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Caterpillar 3406E Engine

Name: Caterpillar 3406E Engine
Brand: Caterpillar

The Caterpillar 3406E is a 14.6 L 6-cylinder ataac engine rated at 2300 rpm, producing up to 597 kW. It powers generator sets from Caterpillar. It holds 34 L (9.0 gal) of oil and 21 L (5.5 gal) of coolant.

Also known as: Caterpillar 3406E

Part of the Caterpillar 3406E engine family — 2 variants share parts & fitment.

14.6 L

Displacement

Cylinders

2300 rpm

Rated speed

597 kW

Gross power

On this pageSpecs Generator sets Maintenance FAQ Service intervals Torque & specs Fluids Fault codes Procedures Wiring

Engine specifications

Oil capacity	34.0 L
Coolant capacity	21.0 L
Displacement	14.6 L
Cylinders	6
Aspiration	ATAAC
Rated speed	2300 rpm
Gross power	597 kW

Generator sets powered by this engine

Caterpillar 3406E

How to read your Caterpillar engine serial & model number →

Troubleshooting

Fault codes

Code	Meaning	Remedy
i01226491	Engine overspeed	Stop the engine by shutting off the fuel supply to the engine and/or shutting off the air supply to the engine.
21	Fault shutdown
22	Fault alarm
105-11	Very High Intake Manifold Air Temperature
110-11	Very High Coolant Temperature
111-11	Very Low Coolant Level
84-00	Vehicle Overspeed Warning
84-14	Quick Stop Occurrence
190-00	Engine Overspeed Warning
3111	0
100-11	Very Low Oil Pressure
55	Diagnostic Code 55

Fault codes and symptom→remedy steps extracted from this engine’s service/owner documentation; verify against the official manual before servicing.

Common problems

Very Low Oil Pressure 100-11
Very Low Coolant Level 111-11
Very High Intake Manifold Air Temperature 105-11
Very High Coolant Temperature 110-11
Vehicle Overspeed Warning 84-00
Quick Stop Occurrence 84-14
Fault shutdown 21
Fault alarm 22
Engine Overspeed Warning 190-00
Engine overspeed i01226491
Fix: Stop the engine by shutting off the fuel supply to the engine and/or shutting off the air supply to the engine.
Diagnostic Code 55 55
0 3111

Compiled from service & troubleshooting documentation across every generator set that uses the Caterpillar 3406E.

Maintenance schedule

Item	Spec	Capacity	Part #	Interval
Oil			—

Pooled from every document that names this exact engine — confirm the interval and part number against your unit's serial number.

Service intervals

Item	Action	Hours	Months	Notes
Zinc rods	Inspect	50 hr		First service — Within 24 hours of initially filling the plumbing with sea water; if no significant corrosion, inspect again after seven days or 50 hours of engine operation
Aftercooler Core	Clean	250 hr		Clean/Test - Every 9500 L (2500 US gal) of Fuel or 250 Service Hours or Yearly
Alternator and Fan Belts	Replace	250 hr		Inspect/Adjust/Replace - Every 19 000 L (5000 US gal) of Fuel or 250 Service Hours
Battery Electrolyte Level	Check	250 hr		Every 19 000 L (5000 US gal) of Fuel or 250 Service Hours
Cooling System Coolant Sample (Level 1)	Test	250 hr		Obtain - Every 250 Service Hours
Cooling System Supplemental Coolant Additive (SCA)	Test	250 hr		Test/Add - Every 19 000 L (5000 US gal) of Fuel or 250 Service Hours
Engine Crankcase Breather	Clean	250 hr		Every 19 000 L (5000 US gal) of Fuel or 250 Service Hours
Engine Protective Devices	Check	250 hr		Every 19 000 L (5000 US gal) of Fuel or 250 Service Hours
Engine Valve Lash	Adjust	250 hr		First service — Inspect/Adjust - First 19 000 L (5000 US gal) of Fuel or 250 Service Hours
Magnetic Pickups	Clean	250 hr		First service — Clean/Inspect - First 19 000 L (5000 US gal) of Fuel or 250 Service Hours
oil	Change	500 hr		3000 Series service intervals increased to 500 hours as standard (3013C, 3024C, 3054, 3056)
Cooling System Coolant Sample (Level 2)	Test	2000 hr	12 mo	Obtain - Every 2000 Service Hours or 1 Year
Engine	Clean	2000 hr	6 mo	Every 2000 Service Hours or 6 Months
Fuel System	Other	2000 hr	6 mo	Prime - Every 2000 Service Hours or 6 Months
Generator	Other	2000 hr	6 mo	Dry - Every 2000 Service Hours or 6 Months
Generator Lead (Round Cable)	Check	2000 hr		Every 2000 Service Hours
Generator Set	Test	2000 hr	6 mo	Every 2000 Service Hours or 6 Months
Rotating Rectifier	Test	2000 hr	6 mo	Every 2000 Service Hours or 6 Months
Severe Service Application	Check	2000 hr	6 mo	Every 2000 Service Hours or 6 Months
Cooling System Coolant Extender (ELC)	Other	6000 hr	36 mo	Add - Every 6000 Service Hours or 3 Years
Insulation	Test	7500 hr	12 mo	Every 7500 Service Hours or 1 Year (Standard and Standby schedule)
Rotating Rectifier	Check	7500 hr	12 mo	Every 7500 Service Hours or 1 Year (Standard and Standby schedule)
Cooling System Coolant (ELC)	Change	12000 hr	72 mo	Every 12 000 Service Hours or 6 Years
minor overhaul	Other	20000 hr		3600 engines designed to run 20 000 hours between minor overhauls using No. 2 fuel
major overhaul	Other	40000 hr		3600 engines designed to run 40 000 hours between major overhauls using No. 2 fuel
cylinder liners and pistons	Other	80000 hr		3600 cylinder liners and pistons designed for 80 000 hours using No. 2 fuel
Bearing (Ball)	Lubricate	2000 hr	12 mo	Every Year (Standby schedule)
Bearing (Spherical Roller)	Lubricate	1000 hr	12 mo	Every Year (Standby schedule)
Fuel System Primary Filter (Water Separator) Element	Replace	500 hr	12 mo	Every Year
Generator Set Vibration	Inspect	2000 hr	12 mo	Every Year (Standby schedule)
Stator Lead	Check	2000 hr	6 mo	Every 6 Months (Standby schedule)

Extracted from the manufacturer documentation linked to this model. Values are copied as printed; confirm against your unit's manual and serial number.

Service specifications

Type	Item	Value	Unit	Condition
Clearance	Bearing bracket step minimum	less than 0.0762	mm
Clearance	Connecting rod bearing clearance (max permissible, used bearings)	0.20	mm (0.008 inch)
Clearance	Connecting rod bearing clearance (new bearings)	0.062 to 0.160	mm (0.0024 to 0.0063 inch)
Clearance	Crankshaft end play (max permissible, used thrust plates)	0.89	mm (0.035 inch)
Clearance	Crankshaft end play (new thrust plates)	0.15 to 0.55	mm (0.006 to 0.022 inch)
Clearance	Crankshaft main bearing clearance (max permissible, used bearings)	0.25	mm (0.010 inch)
Clearance	Crankshaft main bearing clearance (new bearings)	0.091 to 0.186	mm (0.0036 to 0.0073 inch)
Clearance	Damper pilot runout limit	0.10	mm	vibration analysis
Clearance	Dowel protrusion from crankshaft face	4.1 + 0.5	mm (0.16 + 0.02 inch)
Clearance	Maximum dowel length out of crankshaft face	6.4	mm (0.25 inch)
Clearance	Unit injector height (from top of unit injector to machined ledge of fuel injector body)	78.0 ± 0.2	mm
Clearance	Valve guide bore surface diameter	35.00 + 0.50	mm (1.378 + 0.020 inch)
Other	Accelerator pedal position sensor duty cycle at high idle	75 to 90	percent	high idle
Other	Accelerator pedal position sensor duty cycle at low idle	10 to 22	percent	low idle
Other	Belt tension deflection	0.50 to 0.75	inch	110 N (25 lb) force midway between pulleys
Other	Belt tension deflection	13 to 19	mm	110 N (25 lb) force midway between pulleys
Other	Coolant level below filler pipe bottom	13	mm
Other	Cooling system fill rate (maximum)	19	L per minute	to avoid air locks
Other	Engine monitoring derate maximum rate	10	percent per second	warning/derate graph
Other	Engine speed/timing sensor calibration tolerance (primary vs secondary)	3	degrees	0022-11 / 0022-13
Other	Engine valve rotator operation	should turn slightly when valves close
Other	Generator excitation PMG short circuit capability	3 X In for 10 seconds
Other	High idle speed for droop governors	approximately 2% to 5%	above full load speed	governors equipped with droop
Other	Speed droop values commonly used	3% and 0%	%
Other	Turbocharger V-band clamp position	90 ± 10	degrees	outboard from the bottom vertical
Other	Turbocharger compressor housing air outlet position	zero	degrees	from top vertical
Other	Turbocharger weight	34	kg	approximately (75 lb)
Other	Vibration amplitude limit (acceptable engine performance)	4.0	mils	engine vibration measurement
Other	Vibration damper inspection	dented, cracked, leaking, bent or discolored damper must be replaced
Other	Voltage droop for 0.8 power factor load	approximately 5	%	loads with a power factor of 0.8
Pressure	Allowed difference between pressure gauge and Cat ET status screen	35	kPa	engine running
Pressure	Boost pressure with engine OFF	0	kPa	key switch ON, engine OFF
Pressure	Coolant system pressure test - use 9S-8140 Pressurizing Pump	9S-8140
Pressure	Engine oil pressure at low idle	186 to 344	kPa	low idle speed
Pressure	Engine oil pressure default when sensor code active (0100-03 / 0100-04)	600	kPa	engine not running or coolant greater than 38 C
Pressure	Fuel pressure (below which engine will not operate properly)	160	kPa
Pressure	Fuel system primary filter/water separator element change pressure	50 to 70	kPa
Pressure	Maximum air pressure for cleaning	205	kPa	deadheaded nozzle with chip guarding
Pressure	Maximum water pressure for cleaning	275	kPa
Pressure	Minimum recommended oil pressure	103	kPa	600 rpm
Pressure	Minimum recommended oil pressure	15	psi	600 rpm
Pressure	Normal operating engine oil pressure	275 to 600	kPa	engine running at rated engine speed, SAE 10W30 oil, operating oil temperature 104 C (219.2 F), normal engine water temperature
Pressure	Primary filter/water separator change pressure	50 to 70	kPa	15 to 20 inches Hg
Pressure	Typical engine oil pressure at rated rpm with SAE10W30 (turbocharged)	275 to 606	kPa	rated rpm
Pressure	Typical engine oil pressure at rated rpm with SAE10W30 (turbocharged)	40 to 88	psi	rated rpm
Pressure	Unit injector fuel injection pressure	1240	bar (18 000 psi)
Resistance	Exciter Armature (Rotor) (L2) resistance	less than 0.1	ohm	room temperature
Resistance	Exciter Field (Stator) (L1) resistance	3.0 to 6.0	ohms	room temperature
Resistance	Insulation resistance minimum (contaminated generator)	1	megohm
Resistance	Main Armature (Stator) (L4) resistance	less than 0.1	ohm	room temperature
Resistance	Main Field (Rotor) (L3) resistance	0.75 to 2.0	ohms	room temperature
Resistance	Pilot Exciter Armature (L5) resistance	less than 0.1	ohm	room temperature
Resistance	Varistor (CR7) resistance	minimum 15000	ohms
Speed	Actual RPM of overspeed (1500 full load rpm)	1770	rpm	multiply full load RPM by 1.18
Speed	Actual RPM of overspeed (1800 full load rpm)	2124	rpm	multiply full load RPM by 1.18
Speed	Cold mode low idle speed (first 60 seconds)	800	rpm	cold mode active
Speed	Engine speed after 60 seconds of cold mode	600	rpm	cold mode active
Speed	Engine speed limit with 0100-11 Very Low Oil Pressure active	1350	rpm	very low oil pressure active
Speed	Frequency vs RPM - four-pole generator	divide the RPM by 30	Hz
Speed	Frequency vs RPM - six pole generator	divide the RPM by 20	Hz

Extracted from the manufacturer documentation linked to this model. Values are copied as printed; confirm against your unit's manual and serial number.

Recommended fluids

Fluid	Grade	Standard	Ambient	Capacity	Notes
Coolant	Cat DEAC				Diesel; 3,000 Service Hours or Three Years; annual S·O·SSM Level 2 coolant sampling and analysis
Coolant	Cat DEAC Diesel Engine Antifreeze/Coolant	ASTM D4985 or ASTM D5345		58.0 L	Acceptable; 1:1 mixture of water and glycol; service life three years; does not require SCA at initial fill
Coolant	Cat ELC				Diesel; 12,000 Service Hours or Six Years; add Cat ELC Extender at 6,000 service hours or one half of service life; annual S·O·SSM Level 2 coolant sampling and analysis
Coolant	Cat ELC Extended Life Coolant	Caterpillar EC-1		58.0 L	Preferred; 1:1 mixture of water and glycol; service life six years; add ELC Extender once
Coolant	Cat NGEC				Natural Gas; 16,000 Service Hours or Three Years; use interval that occurs first
Coolant	Caterpillar SCA and Water				For stationary applications not requiring boiling/freezing protection; minimum six percent to maximum eight percent SCA concentration; service life two years
Engine oil	Cat NGEO				Natural Gas
Engine oil	SAE 10W30				Referenced as the oil used when normal operating engine oil pressure is specified
Engine oil	Cat Arctic DEO SYN SAE 0W-30		-40°C to 30°C		Engine Crankcase; Industrial Engines
Engine oil	SAE 0W-20	Cat DEO Multigrade API CH-4/API CG-4	-40°C to 10°C
Engine oil	SAE 0W-30	Cat DEO Multigrade API CH-4/API CG-4	-40°C to 30°C
Engine oil	SAE 0W-40	Cat DEO Multigrade API CH-4/API CG-4	-40°C to 40°C
Engine oil	Cat DEO SYN SAE 5W-40		-30°C to 50°C		Engine Crankcase; Industrial Engines
Engine oil	SAE 5W-30	Cat DEO Multigrade API CH-4/API CG-4	-30°C to 30°C
Engine oil	SAE 5W-40	Cat DEO Multigrade API CH-4/API CG-4	-30°C to 50°C
Engine oil	Cat DEO SAE 10W-30		-18°C to 40°C		Engine Crankcase; Industrial Engines
Engine oil	SAE 10W-30	Cat DEO Multigrade API CH-4/API CG-4	-18°C to 40°C
Engine oil	Cat DEO SAE 15W-40		-9°C to 50°C		Engine Crankcase; Industrial Engines
Engine oil	SAE 15W-40	Cat DEO Multigrade API CH-4/API CG-4	-9°C to 50°C
Fuel	No. 1-D or No. 2-D	ASTM D975			Use No. 1 diesel fuel or a blend of No. 1 and No. 2 for cold-weather operation; No. 2 is most commonly used
Fuel	No. 2 fuel				3600 engines designed for 80 000 hours on No. 2 fuel; ratings based on API gravity of 35 at 15 C (60 F), LHV of 42 780 kJ/kg used at 29 C (84 F) with a density of 838.9 g/L
Grease	Cat Generator Set Grease				Part Number 108-8611
Grease	High Speed Ball Bearing Grease				Fan drive bearing grease fitting
Grease	Multipurpose Grease	1P-0808			Fuel control linkage lubrication
Grease	NLGI No. 1.5 Grade				Caterpillar 108-8611 Grease Cartridge for spherical roller bearings; contains Clay thickener; no molybdenum disulfide; viscosity 32 cSt at 40 C, 5 cSt at 100 C
Grease	NLGI No. 2 Grade		-29°C to 177°C		Caterpillar 2S-3230 Bearing Lubricant for ball bearings; contains Polyurea thickener; for extremely low temperatures use NLGI No. 1 Grade or NLGI No. 0 Grade

Extracted from the manufacturer documentation linked to this model. Values are copied as printed; confirm against your unit's manual and serial number.

Fault codes

Code	Name	Meaning	Severity	Action
0001-11	Cylinder #1 Injector current fault	The ECM detects a low current condition (open circuit) in the No. 1 cylinder injector solenoid wiring or a high current condition (short circuit) in the injector solenoid. Flash code 72.	Warning	Perform "Injector Solenoid Circuit - Test"
0002-11	Cylinder #2 Injector current fault	Low current (open circuit) or high current (short circuit) in the No. 2 cylinder injector solenoid. Flash code 72.	Warning	Perform "Injector Solenoid Circuit - Test"
0003-11	Cylinder #3 Injector current fault	Low current (open circuit) or high current (short circuit) in the No. 3 cylinder injector solenoid. Flash code 73.	Warning	Perform "Injector Solenoid Circuit - Test"
0004-11	Cylinder #4 Injector current fault	Low current (open circuit) or high current (short circuit) in the No. 4 cylinder injector solenoid. Flash code 73.	Warning	Perform "Injector Solenoid Circuit - Test"
0005-11	Cylinder #5 Injector current fault	Low current (open circuit) or high current (short circuit) in the No. 5 cylinder injector solenoid. Flash code 74.	Warning	Perform "Injector Solenoid Circuit - Test"
0006-11	Cylinder #6 Injector current fault	Low current (open circuit) or high current (short circuit) in the No. 6 cylinder injector solenoid. Flash code 74.	Warning	Perform "Injector Solenoid Circuit - Test"
0022-11	Primary to Secondary Engine Speed Signal Calibration	A timing calibration has been completed and the primary and secondary speed/timing sensors are off by more than 3 degrees. ECM uses default timing. Flash code 42.	Warning	Check the cluster gear, camshaft backlash and engine speed/timing sensors
0022-13	Engine Speed Signal Calibration Not Performed	A timing calibration has never been performed on a new ECM or the timing is off by more than 3 degrees. ECM uses default timing. Flash code 42.	Warning	Perform "Engine Speed/Timing Sensor - Calibrate"
0030-08	PTO Throttle signal invalid	The PTO Configuration is programmed to Remote Throttle and the ECM is not receiving a valid signal from the PTO throttle. Flash code 29.	Warning	Perform "Remote PTO Accelerator Position Sensor Circuit - Test"
0030-13	PTO Throttle out of calibration	The duty cycle of the PTO throttle signal is less than 5 percent or more than 95 percent for more than two seconds with PTO Configuration programmed to Remote Throttle. Flash code 29.	Warning	Perform "Remote PTO Accelerator Position Sensor Circuit - Test"
0041-03	8 Volt Supply voltage high	The 8 volt supply is more than 8.5 VDC for more than one second. Flash code 21.	Warning	Perform "Accelerator Pedal (Throttle) Position Sensor Circuit - Test"
0041-04	8 Volt Supply voltage low	The 8 volt supply is less than 7.5 VDC for more than one second. Flash code 21.	Warning	Perform "Accelerator Pedal (Throttle) Position Sensor Circuit - Test"
0043-02	Key Switch Fault	The key switch was rapidly cycled at least three times within the last second, indicating an intermittent battery circuit to the key switch or a low battery condition while the engine is running. Flash code 71.	Warning	Perform "Ignition Key Switch Circuit and Battery Supply Circuit - Test"
0052-11	Air Inlet Shutoff Shutdown	The engine was shut down due to an engine overspeed condition; ECM disables the unit injectors and activates the air inlet shutoff relay. Flash code 00.	Shutdown	Talk to the Operator to determine the reason for the engine overspeed; refer to "Air Inlet Shutoff Circuit - Test"
0054-05	Auxiliary Output #06 current low	A low current condition (open circuit) exists in the circuit for the lockout solenoid for more than two seconds with Transmission Style programmed to Eaton Top 2. Flash code 66.	Warning	Perform "Eaton Top 2 Transmission Circuit - Test"
0054-06	Auxiliary Output #06 current high	A high current condition (short circuit) exists in the circuit for the lockout solenoid for more than two seconds with Transmission Style programmed to Eaton Top 2. Flash code 66.	Warning	Perform "Eaton Top 2 Transmission Circuit - Test"
0055-05	Auxiliary Output #07 current low	A low current condition (open circuit) exists in the circuit for the shift solenoid with Transmission Style programmed to Eaton Top 2. Flash code 67.	Warning	Perform "Eaton Top 2 Transmission Circuit - Test"
0055-06	Auxiliary Output #07 current high	A high current condition (short circuit) exists in the circuit for the shift solenoid with Transmission Style programmed to Eaton Top 2. Flash code 67.	Warning	Perform "Eaton Top 2 Transmission Circuit - Test"
0064-12	Secondary Engine Speed loss of signal	The signal for the secondary engine speed/timing sensor is intermittent or lost. Flash code 34.	Warning	Perform "Engine Speed/Timing Sensor Circuit - Test"
0071-00	Idle Shutdown Override	The Allow Idle Shutdown Override parameter is programmed to Yes and the brake or clutch switch status changes within the final 90 seconds of the idle shutdown timer. Flash code 01.	Info	Perform "Idle Shutdown Timer - Test"
0071-01	Idle Shutdown	The idle shutdown timer has expired and the engine has shut down. Flash code 47.	Shutdown	Perform "Idle Shutdown Timer - Test"
0071-14	PTO Shutdown	The timer for the PTO has expired and the engine has shut down with the PTO On/Off switch in the ON position. Flash code 47.	Shutdown	Perform "PTO Shutdown Timer - Test"
0084-00	Vehicle Overspeed Warning	The vehicle speed exceeds the programmed Vehicle Speed Limit by more than 10 MPH (Soft VSL No) or 15 MPH (Soft VSL Yes) for more than 20 seconds. Flash code 41.	Warning	Perform "Vehicle Speed Circuit - Calibrate"
0084-01	Vehicle Speed loss of signal	The vehicle speed signal indicates 0 MPH while engine speed is above VSL Protection minus 100 rpm. Flash code 31.	Warning	Perform "Vehicle Speed and Speedometer Circuit - Test"
0084-02	Vehicle Speed signal invalid	The vehicle speed signal indicates a constant MPH with engine speed greater than 950 rpm. Flash code 36.	Warning	Perform "Vehicle Speed and Speedometer Circuit - Test"
0084-08	Vehicle Speed signal out of range	The vehicle speed signal indicates vehicle speed greater than 127.5 MPH for more than two seconds. Flash code 36.	Warning	Perform "Vehicle Speed and Speedometer Circuit - Test"
0084-10	Vehicle Speed signal rate of change	The vehicle speed signal changes more than 5 MPH on eight consecutive readings in three seconds. Flash code 36.	Warning	Perform "Vehicle Speed and Speedometer Circuit - Test"
0084-14	Quick Stop Occurrence	The vehicle speed slows at a rate that exceeds the programmed Quick Stop Rate with the service brake applied. The ECM records engine speed, vehicle speed, throttle position, cruise status, clutch switch and brake switch.	Info	No electronic system fault; check that the Quick Stop Rate parameter is not set too low
0091-08	Throttle Position Invalid	The signal frequency from the accelerator pedal position sensor is less than 150 Hz or greater than 1050 Hz for more than two seconds. Flash code 32.	Warning	Perform "Accelerator Pedal (Throttle) Position Sensor Circuit - Test"
0091-13	Throttle Position out of calibration	The duty cycle for the accelerator pedal position sensor is less than 5 percent or greater than 95 percent for more than two seconds. Flash code 32.	Warning	Perform "Accelerator Pedal (Throttle) Position Sensor Circuit - Test"
0100-01	Low Oil Pressure Warning	The engine oil pressure is below the trip line for more than eight seconds. Flash code 46.	Warning	Check engine oil level, sensor installation, active diagnostic codes, status screen, 5 volt supply and oil pressure map
0100-03	Oil Pressure voltage high	The signal voltage from the engine oil pressure sensor is greater than 4.8 VDC for more than eight seconds. Flash code 24.	Warning	Perform "Engine Pressure Sensor Open or Short Circuit - Test"
0100-04	Oil Pressure voltage low	The signal voltage from the engine oil pressure sensor is less than 0.2 VDC for more than eight seconds. Flash code 24.	Warning	Perform "Engine Pressure Sensor Open or Short Circuit - Test"
0100-11	Very Low Oil Pressure	The engine oil pressure is below the trip line for more than eight seconds. Engine speed limited to 1350 rpm and vehicle speed limited to 72 km/h (45 mph). Flash code 46.	Warning	Check engine oil level, sensor installation, active diagnostic codes, status screen, 5 volt supply and oil pressure map
0102-00	Excessive Boost Pressure	The actual boost pressure is higher than the desired boost pressure. Boost pressure is set to 0 kPa (0 psi).	Warning	Determine the cause of the excessive boost pressure such as a failed turbocharger wastegate or a pinched wastegate line
0102-03	Boost Pressure voltage high	The signal voltage from the boost pressure sensor is greater than 4.8 VDC for more than two seconds. Flash code 25.	Warning	Perform "Engine Pressure Sensor Open or Short Circuit - Test"
0102-04	Boost Pressure voltage low	The signal voltage from the boost pressure sensor is less than 0.2 VDC for more than one second. Flash code 25.	Warning	Perform "Engine Pressure Sensor Open or Short Circuit - Test"
0105-00	High Intake Manifold Air Temperature Warning	The intake manifold air temperature is greater than 90 C (194.0 F) for more than four seconds. Flash code 64.	Warning	Check the air-to-air aftercooler for debris and/or restriction to the air flow
0105-03	Intake Manifold Air Temperature voltage high	The signal voltage from the intake manifold air temperature sensor is greater than 4.9 VDC for more than eight seconds. Flash code 38.	Warning	Perform "Engine Temperature Sensor Open or Short Circuit - Test"
0105-04	Intake Manifold Air Temperature voltage low	The signal voltage from the intake manifold air temperature sensor is less than 0.2 VDC for more than eight seconds. Flash code 38.	Warning	Perform "Engine Temperature Sensor Open or Short Circuit - Test"
0105-11	Very High Intake Manifold Air Temperature	The intake manifold air temperature is greater than 109 C (228 F) for more than two seconds. Flash code 64.	Warning	Check the air-to-air aftercooler for debris and/or restriction to the air flow
0108-03	Barometric Pressure voltage high	The signal voltage from the atmospheric pressure sensor is greater than 4.9 VDC. Flash code 26.	Warning	Perform "Engine Pressure Sensor Open or Short Circuit - Test"
0108-04	Barometric Pressure voltage low	The signal voltage from the atmospheric pressure sensor is low. Flash code 26.	Warning	Perform "Engine Pressure Sensor Open or Short Circuit - Test"
0110-00	High Coolant Temperature Warning	High coolant temperature warning. Flash code 61.	Warning	Refer to "Engine Temperature Sensor Open or Short Circuit - Test"
0110-03	Coolant Temperature voltage high	The signal voltage from the coolant temperature sensor is high. Flash code 27.	Warning	Perform "Engine Temperature Sensor Open or Short Circuit - Test"
0110-04	Coolant Temperature voltage low	The signal voltage from the coolant temperature sensor is low. Flash code 27.	Warning	Perform "Engine Temperature Sensor Open or Short Circuit - Test"
0110-11	Very High Coolant Temperature	Very high coolant temperature; in Shutdown mode the engine will be shut down. Flash code 61.	Shutdown	Refer to "Engine Temperature Sensor Open or Short Circuit - Test"
0111-01	Low Coolant Level Warning	Low coolant level warning. Flash code 62.	Warning	Check the coolant level sensor and circuit
0111-02	Coolant Level signal invalid	Invalid coolant level signal. Flash code 12.	Warning	Check the coolant level sensor and circuit
0111-03	Coolant Level voltage high	Coolant level voltage high. Flash code 12.	Warning	Check the coolant level sensor and circuit
0111-04	Coolant Level voltage low	Coolant level voltage low. Flash code 12.	Warning	Check the coolant level sensor and circuit
0111-11	Very Low Coolant Level	Very low coolant level; in Shutdown mode the engine will be shut down. Flash code 62.	Shutdown	Check the coolant level sensor and circuit
0121-05	Low/High Retarder current low	Low current condition in the Low/High retarder solenoid circuit. Flash code 14.	Warning	Perform "Retarder (Compression Brake) Solenoid Circuit - Test"
0121-06	Low/High Retarder current high	High current condition in the Low/High retarder solenoid circuit. Flash code 14.	Warning	Perform "Retarder (Compression Brake) Solenoid Circuit - Test"
0122-05	Med/High Retarder current low	Low current condition in the Med/High retarder solenoid circuit. Flash code 14.	Warning	Perform "Retarder (Compression Brake) Solenoid Circuit - Test"
0122-06	Med/High Retarder current high	High current condition in the Med/High retarder solenoid circuit. Flash code 14.	Warning	Perform "Retarder (Compression Brake) Solenoid Circuit - Test"
0168-02	ECM Battery Power Intermittent	Intermittent battery power to the ECM. Flash code 51.	Warning	Perform "Ignition Key Switch Circuit and Battery Supply Circuit - Test"
0171-03	Ambient Air Temperature voltage high	Ambient air temperature sensor voltage high.	Warning	Check the ambient air temperature sensor circuit
0171-04	Ambient Air Temperature voltage low	Ambient air temperature sensor voltage low.	Warning	Check the ambient air temperature sensor circuit
0171-11	Ambient Air Temperature Data Lost	No ambient air temperature data.	Warning	Check the ambient air temperature sensor circuit
0174-00	High Fuel Temperature Warning	High fuel temperature warning. Flash code 65.	Warning	Check the fuel temperature sensor and fuel system
0174-03	Fuel Temperature voltage high	Fuel temperature sensor voltage high. Flash code 13.	Warning	Perform "Engine Temperature Sensor Open or Short Circuit - Test"
0174-04	Fuel Temperature voltage low	Fuel temperature sensor voltage low. Flash code 13.	Warning	Perform "Engine Temperature Sensor Open or Short Circuit - Test"
0190-00	Engine Overspeed Warning	Engine overspeed warning. Flash code 35.	Warning	Check the engine speed/timing sensors
0190-12	Primary Engine Speed loss of signal	The signal for the primary engine speed/timing sensor is lost. Flash code 34.	Warning	Perform "Engine Speed/Timing Sensor Circuit - Test"
0191-07	Transmission Not Responding	Transmission not responding. Flash code 68.	Warning	Check the transmission and data link
0224-11	Theft Deterrent Active	The theft deterrent is active. Flash code 00.	Warning	Enter the theft deterrent password
0224-14	Theft Deterrent Active with Engine Cranking	The theft deterrent is active with the engine cranking. Flash code 00.	Warning	Enter the theft deterrent password
0231-02	J1939 Data Incorrect	Incorrect data on the J1939 data link. Flash code 58.	Warning	Perform "ATA (SAE J1587 / J1708) Data Link Circuit - Test" / check J1939 data link
0231-11	J1939 Data Link Fault	J1939 data link fault. Flash code 58.	Warning	Check the J1939 data link
0231-12	J1939 Device Not Responding	A J1939 device is not responding.	Warning	Check the J1939 data link and device
0232-03	5 Volt Supply voltage high	5 volt supply voltage high. Flash code 21.	Warning	Check the 5 volt supply and sensor circuits
0232-04	5 Volt Supply voltage low	5 volt supply voltage low. Flash code 21.	Warning	Check the 5 volt supply and sensor circuits
0246-11	Brake Pedal Switch #1 Fault	Brake pedal switch #1 fault. Flash code 00.	Warning	Perform "Service Brake Pedal Position (Switch 1) Circuit - Test"
0247-11	Brake Pedal Switch #2 Fault	Brake pedal switch #2 fault. Flash code 00.	Warning	Check the service brake pedal position switch #2 circuit
0249-11	J1922 Data Link Fault	J1922 data link fault. Flash code 58.	Warning	Check the J1922 data link
0252-11	Engine Software Incorrect	Incorrect engine software. Flash code 59.	Warning	Perform "ECM Memory - Test"
0253-02	Check Customer or System Parameters	Customer or system parameters are not programmed. Flash code 56.	Warning	Program FLS, FTS, Vehicle Speed Calibration, Rating Number, Engine Serial Number and Injector Codes Calibration
0253-11	Check Transmission Customer Parameters	Transmission customer parameters must be programmed. Flash code 56.	Warning	Program the transmission customer parameters

Extracted from the manufacturer documentation linked to this model. Values are copied as printed; confirm against your unit's manual and serial number.

Procedures

Engine Oil Level Gauge - Calibrate adjustment

Tools: Marking pen

Operate engine until normal operating temperature is achieved; stop engine; remove a crankcase drain plug and drain oil pan completely.
Remove used engine oil filter; install new filter; install drain plug; tighten to 70 ± 14 N·m (50 ± 10 lb ft).
Add recommended oil: Standard Sump 45.4 L (48 qt); Deep Sump 64 L (68 qt).
Start engine; ensure lubrication system and new filter are filled; inspect for leaks.
Stop engine; allow oil to drain into crankcase approximately five minutes.
Check oil level; use a marking pen to engrave ADD mark (Y).
Add 3.8 L (4 qt) recommended oil; full volume now 49.2 L (52 qt) standard sump or 68.1 L (72 qt) deep sump; allow to drain five minutes.
Check oil level; use a marking pen to engrave FULL mark (X).

Engine Valve Lash - Inspect/Adjust adjustment

⚠ Ensure that the engine can not be started while this maintenance is being performed.

⚠ Hot engine components can cause burns; allow additional time for the engine to cool before measuring/adjusting valve lash clearance.

Initial valve lash adjustment on new, rebuilt, or remanufactured engines is recommended at the first scheduled oil change.
Adjust the electronic unit injector (preload) at the same interval as the valve lash adjustment.
Only qualified service personnel should perform this maintenance.

Fuel Injector - Inspect/Adjust adjustment

⚠ Only qualified service personnel should perform valve lash maintenance.

Tools: 9U-7227 Injector Height Gauge

Inspect the injector mechanism for signs of wear.
Put the No. 1 piston at the top center position on the compression stroke.
Use the 9U-7227 Injector Height Gauge to obtain 78.0 ± 0.2 mm (3.07 ± 0.01 inch) from top of unit injector to machined ledge of fuel injector body.
Turn unit injector adjustment screw clockwise until the correct height is obtained.
Hold adjustment screw and tighten locknut to 100 ± 10 N·m (75 ± 7 lb ft).
For cylinders 1, 2, 3, 7, 8, and 10 remove the timing bolt; turn flywheel 360 degrees counterclockwise (viewed from flywheel end) to put No. 11 piston at top center.
Repeat adjustment steps 3 through 4.
Remove timing bolt from flywheel; reinstall valve mechanism covers.

VR3 Regulator Adjustment Procedure adjustment

⚠ The VR3 regulator is protected by a fuse(s) and a solid-state overcurrent protection. If a fuse becomes open, contact a Caterpillar dealer.

Remove the access panel of the generator.
Loosen the locknut on the voltage droop potentiometer (1).
Remove the protective screw from the voltage level potentiometer (2) and from the voltage gain potentiometer (3).
Turn the voltage droop potentiometer (1) counterclockwise to zero droop. Tighten the locknut.
Turn the voltage gain potentiometer (3) counterclockwise to zero, then to about 1/4 of full range of clockwise travel.
Perform required maintenance on the engine before you start the engine.
Start the engine and allow the engine to warm up.
Increase engine speed to full governed rated speed (high idle).
Set the no-load voltage with the voltage level potentiometer (2) or the voltage adjust rheostat.
Close the load circuit breaker and apply full load gradually. Adjust governor control to nameplate frequency or rated speed.
If the voltmeter reading increases above no-load voltage, turn the voltage gain potentiometer counterclockwise. If it decreases, turn it clockwise.
Remove the load. If necessary, adjust the voltage level potentiometer (2) to obtain desired voltage.
Apply the load. Repeat Steps 10 through 12 until the voltage at no load equals the voltage at full load.
Tighten the locknuts. Install the protective screws and the access panel of the generator.

Generator Set Functional Test diagnostic

⚠ Do not operate the generator set at a speed higher than one-half of the rated speed.

Tools: 6V-7070 Digital Multimeter, 12 VDC battery, Potential Transformer

Stop the generator. Connect the potential transformer's high voltage winding to generator terminals T1 and T2. Connect the voltmeter to the low voltage winding.
Disconnect wires F1+ and F2- from the voltage regulator. Disconnect the generator from the load.
Connect a 12 VDC automotive battery to wires F1+ and F2-.
Operate the generator set at half the rated speed.
Measure the AC voltage across the low voltage terminals corresponding to T1-T2, T2-T3, and T3-T1. Record the voltages.
Monitor the voltage between any two locations, then decrease the generator set speed by 10 percent and increase it by 10 percent.
The measured voltages should be nearly equal and should measure a minimum of 85 VAC.
When speed is decreased by 10 percent the voltages should decrease by 10 percent; when increased by 10 percent the voltages should increase by 10 percent.

Rotating Rectifier - Test diagnostic

Tools: 6V-7070 Digital Multimeter, 146-4080 Digital Multimeter (RS-232)

Touch the red ohmmeter lead to the rectifier terminal marked '+'.
Touch the black ohmmeter lead to terminals AC1, AC2, and AC3; the meter should indicate an open circuit or high resistance.
Touch the black ohmmeter lead to the rectifier terminal marked '+'.
Touch the red ohmmeter lead to terminals AC1, AC2, and AC3; the meter should indicate a good diode or low resistance.
Touch the black ohmmeter lead to the rectifier terminal marked '-'.
Touch the red ohmmeter lead to terminals AC1, AC2, and AC3; the meter should indicate an open circuit or high resistance.
Touch the red ohmmeter lead to the rectifier terminal marked '-'.
Touch the black ohmmeter lead to terminals AC1, AC2, and AC3; the meter should indicate a good diode or low resistance.
If the meter does not indicate the expected result, the rectifier is bad. Replace the rectifier.

Rotating Rectifier - Test (Brushless Exciter) diagnostic

Tools: 6V-7070 Digital Multimeter, 9U-7330 Multimeter, 146-4080 Digital Multimeter (RS-232), 7X-1710 Multimeter Probe Group

Remove the cover from the exciter.
Remove the nut securing the rectifier to the heat sink.
Remove the diode lead and lift the rectifier from the heat sink.
Connect ohmmeter leads across the rectifier and note reading.
Reverse the ohmmeter leads and note reading.
Low resistance one direction and high the other indicates a good rectifier.
Low resistance both directions indicates shorted rectifier.
High resistance both directions indicates open rectifier; replace faulty rectifiers.

Triggering the snapshot with the Cruise Control Set/Resume Switch diagnostic

Toggle the switch quickly from the OFF position (1) to the SET position (2).
Toggle the switch quickly from the SET position (2) to the RESUME position (3).
Toggle the switch quickly from the RESUME position (3) back to the OFF position (1).
The switch must be toggled within a one second time period to take a snapshot. The procedure can also be performed in reverse order.

Varistor - Test diagnostic

Tools: Ohmmeter, Test Light

Using an ohmmeter, place the ohmmeter across the varistor. The resistance should be a minimum of 15000 ohms.
Disconnect either lead of the varistor (CR7).
Place the test light across the varistor.
Observe the results. The lamp should not light.
Reverse the test light.
Observe the results. The lamp should not light.
If the test light illuminates in either direction, there is a short in the varistor. Replace any faulty varistors with comparable operating characteristics.

Connecting Cat ET and the Communication Adapter II installation

⚠ Turn the keyswitch to the OFF/RESET position. If the keyswitch is not placed in the OFF/RESET position, the engine may start.

Tools: 171-4400 Communication Adapter II Gp, 196-0055 Adapter Cable As, 171-4401 Communication Adapter II, 207-6845 Adapter Cable As, 7X-1700 Communication Adapter Gp (may also be used)

Turn the keyswitch to the OFF/RESET position. If not, the engine may start.
Connect cable (2) between the COMPUTER end of communication adapter (3) and the RS232 serial port of PC (1).
Connect cable (4) between the DATA LINK end of communication adapter (3) and the service tool connector.
Turn the keyswitch to the ON position.
If Cat ET and the communication adapter do not communicate with the ECM, refer to Electronic Service Tool Will Not Communicate With ECM.

Flash Programming installation

⚠ Operating the engine with a Personality Module not designed for that engine will damage the engine.

Tools: Caterpillar Electronic Technician (Cat ET), WinFlash

Obtain the part number for the new flash file.
Connect the electronic service tool to the data link connector.
Turn the key switch to the ON position. Do not start the engine.
Select WinFlash from the Utilities menu on the electronic service tool.
Program the flash file into the ECM. Select the engine ECM under Detected ECMs.
Press the Browse button in order to select the part number of the flash file.
Verify that the File Values match the application.
Press the Begin Flash button.
Start the engine and check for proper operation.
Program any parameters that were not programmed if a 253-02 Check Customer Or System Parameters is active.

Battery - Replace maintenance

⚠ Batteries give off combustible gases which can explode.

⚠ Removing cables with cover in place may cause battery explosion.

Turn key start switch to OFF; remove key and all electrical loads.
Turn OFF and disconnect battery charger.
Disconnect NEGATIVE - cable from NEGATIVE - battery terminal.
Disconnect POSITIVE + cable from POSITIVE + battery terminal.
Remove the used battery.
Install the new battery.
Connect cable from starting motor to POSITIVE + terminal.
Connect cable from ground plane to NEGATIVE - terminal.

Extracted from the manufacturer documentation linked to this model. Values are copied as printed; confirm against your unit's manual and serial number.

Voltage reconnection

Voltage	Phase	Connection	Leads	Notes
	3	Delta - 6 lead	6	Winding pitch must be two-thirds or the generator must be derated.
	3	Wye - 10 lead (high voltage)	10	Illustration 13. Only used on 3306B generator sets and 3406C generator sets. Terminal T0 is the neutral lead.
	3	Wye - 10 lead (low voltage)	10	Only used on 3306B and 3406C generator sets. Terminal T0 is the neutral lead.
	3	Wye - 12 lead (high voltage)	12	Terminals T10, T11, and T12 become neutral connections when tied together.
	3	Wye - 12 lead (low voltage)	12	Terminals T10, T11, and T12 become neutral connections when tied together.
	3	Wye - 4 lead	4	Only used on 3306B generator sets and 3406C generator sets. Terminal T0 is the neutral lead.
	3	Wye - 6 lead	6	Terminals T4, T5, and T6 become neutral connections when the terminals are tied together.
	three-phase	10 Lead Wye Configuration - High Voltage	Terminal T0 is the neutral lead	For 3306B and 3406C generator sets only
	three-phase	10 Lead Wye Configuration - Low Voltage	Terminal T0 is the neutral lead	For 3306B and 3406C generator sets only
	three-phase	12 Lead Delta Configuration	Terminals T6 and T9 become the neutral connection when tied together and grounded; T2 and T10 connection is the high phase
	three-phase	12 Lead Wye Configuration - High Voltage	Terminals T10, T11 and T12 become neutral connection when tied together
	three-phase	12 Lead Wye Configuration - Low Voltage	Terminals T10, T11 and T12 become neutral connection when tied together
	three-phase	4 Lead Wye Configuration	Terminal T0 is the neutral lead	For 3306B and 3406C generator sets only
	three-phase	6 Lead Delta Configuration
	three-phase	6 Lead Wye Configuration	Terminals T4, T5 and T6 become neutral connection when tied together
240	3	Delta - 12 lead	12	Terminals T6 and T9 become the neutral connections when tied together and grounded. T2 and T10 connection is the high phase. 240 V, 60 Hz, three-phase: 208 Volts between the high phase and neutral; 240 Volts between either of the low phases and neutral.
240	three-phase	Delta Configuration (60 Hz, 12 Lead)	T6 and T9 neutral when tied together and grounded	208 Volts between high phase and neutral; 240 Volts between either low phase and neutral
480	three-phase	Wye Configuration (typical series Wye, 60 Hz, 12 Lead)	T10, T11, T12 neutral when tied	For 3406E, 3412C and 3500 series generator sets only - high voltage

Extracted from the manufacturer documentation linked to this model. Values are copied as printed; confirm against your unit's manual and serial number.

Aftermarket parts that fit this engine

12.7mm FridayParts $121.08 3N-7758 FridayParts $121.08 218-9901 FridayParts $88.10 171-2212 FridayParts $75.99 225-8758 FridayParts $89.99 201-0950 FridayParts $94.30 3E-6466 FridayParts $73.99 162-2073 FridayParts $73.99 5P-8309 FridayParts $48.90 3E-0156 FridayParts $15.78 118-6606 FridayParts $104.45 247-7133 Amazon eBay $107.00 eBay $41.00 FridayParts $27.50 261-6847 FridayParts $112.35 124-5572 KuduParts $50.00 6T-0988 FridayParts $45.00 2G-1034 FridayParts $13.66 9S-9082 Amazon eBay $24.58 FridayParts $29.81 0508477 FridayParts $29.81 0665815 KuduParts $48.00 120-6659 FridayParts $69.99 135-2151 FridayParts $69.99 7E-3999 FridayParts $69.99 200-2279 FridayParts $74.58 217-8938 FridayParts $63.99 347-7963 FridayParts $61.71 7T-9307 FridayParts $240.68 9Y-2988 FridayParts $40.68 142-5867 eBay $41.66 FridayParts $39.38 6Y-2065 FridayParts $160.14 6K-5528 FridayParts $60.00 124-1855 FridayParts $22.23 197-9322 FridayParts $92.88 210-0848 FridayParts $862.60 109-6406 FridayParts $300.99 279-2591 FridayParts $300.99 109-4367 FridayParts $179.99 261-6848 FridayParts $159.99 490-7200 FridayParts $43.68 4N-2572 FridayParts $262.16 149-8434 FridayParts $159.99 162-7862 FridayParts $68.41 6Y-0859 FridayParts $73.29 155-5619 FridayParts $29.10 1R-0712 KuduParts $39.00 3I-1333 KuduParts $39.00 3I-0752 KuduParts $39.00 1R-0749 Amazon $90.99 Amazon $19.99 eBay $135.88 eBay $135.88 KuduParts $17.00 159-2497 FridayParts $430.10 159-7373 FridayParts $692.63 162-2211 FridayParts $138.99 116-5431 FridayParts $189.00 170-0061 FridayParts $29.99 133-5673 Amazon $47.30 eBay $19.99 eBay $19.99 KuduParts $19.00 513-4490 Amazon eBay $23.43 PartsGeek $48.97 FridayParts $29.99 129-0375 KuduParts $22.00 338-1488 FridayParts $423.23 185-4261 FridayParts $423.23 216-0281 FridayParts $423.23 184-3124 FridayParts $2399.89 187-9090 FridayParts $1159.99

Parts listed by aftermarket suppliers as fitting this engine — leads compiled from supplier catalogs; verify the exact part for your serial number.

Also used in

Case/Case Ih LION — Tractor
Case/Case Ih PANTHER — Tractor
Caterpillar 740 — Dump Truck Articulated
Caterpillar 824C — Dozer Wheeled
Caterpillar 825C — Compactor
Caterpillar 826C — Compactor
Caterpillar AD55 — Mining Equipment
Caterpillar D8R II — Tractor Tracked
Caterpillar PM465 — Planer
Driltech D40K — Drilling Equipment
Ford CL-9000 — Truck
Ford CLT-9000 — Truck

Other equipment known to use this engine, via filter-application cross-reference — useful for sourcing parts even when your exact machine isn't listed elsewhere on this page.

Common questions

What is the oil capacity of the Caterpillar 3406E?

The Caterpillar 3406E engine has an oil capacity of 34.0 liters.

What is the displacement of the Caterpillar 3406E?

The Caterpillar 3406E has a displacement of 14.6 liters with 6 cylinders.

Which generators use the Caterpillar 3406E engine?

The Caterpillar 3406E powers 1 generator set(s), including Caterpillar 3406E.

What is a common problem with the Caterpillar 3406E engine?

A commonly reported issue on generators using the Caterpillar 3406E is: Very Low Oil Pressure.