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John Deere 6090 (9.0 L) Engine

The John Deere 6090 (9.0 L) is a 9 L 6-cylinder engine. It powers generator sets from John Deere, including the 9.0 L Level 14 Electronic Fuel System.

Also known as: John Deere 6090 (9.0 L)

Part of the John Deere 6090 engine family — 27 variants share parts & fitment.

9.0 L

Displacement

Cylinders

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

Engine specifications

Displacement	9.0 L
Cylinders	6

Generator sets powered by this engine

John Deere 9.0 L Level 14 Electronic Fuel System

How to read your John Deere engine serial & model number →

Maintenance schedule

Item	Spec	Part #	Interval
Fuel filter	10-micron filter element	—	500 hr
Coolant	John Deere COOL-GARD II Premix (50% ethylene glycol) preferred	—
Oil	John Deere Break-In or Break-In Plus Engine 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
Engine oil and filter (Break-In Oil)	Change	100 hr		First service — Maximum 100 hours during initial operation of new or rebuilt engine filled with John Deere Break-In Oil
Engine oil and filter (Break-In Plus Oil)	Change	500 hr		First service — Maximum 500 hours during initial operation of new or rebuilt engine filled with John Deere Break-In Plus Oil
Fuel filters and doser elements	Replace	500 hr	12 mo	Replace doser elements at the same 500 hour or 12 month interval as fuel filters; primary and secondary filters must be replaced at the same time
Cooling system	Drain	6000 hr	72 mo	John Deere COOL-GARD II Premix/Concentrate, maintenance free when topped off with COOL-GARD II Premix
Coolant	Test		12 mo	Test coolant solution at intervals of 12 months or less and whenever excessive coolant is lost through leaks or overheating

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
Other	Fuel transfer pump PWM signal frequency	133	Hz
Other	Suction Control Valve reference length (9L pump)	27.6 +/- 1	mm (1.09 +/- 0.040 in.)
Pressure	Air bleed/check valve opening pressure	14	kPa (2 psi)
Pressure	Fuel supply pressure fault threshold	-5	kPa	likely clogged filter
Pressure	Low pressure fuel system pressure at secondary filter outlet	20	kPa (2.9 psi)	engine running, gauge
Speed	Engine synchronization minimum rpm	975	rpm
Speed	Fuel transfer pump speed range	1600 - 4200	rpm	engine running
Temperature	EGR cooler exhaust gas inlet temperature	450-750	°C
Temperature	EGR cooler exhaust gas outlet temperature	170-250	°C
Temperature	EGR valve begins to open coolant temperature	79	°C (175°F)
Temperature	Fuel temperature (transfer pump internal) high threshold	125	°C (257°F)
Temperature	Radiator shutters fully open coolant temperature	93	°C (200°F)
Torque	2 Harness Brackets-to-Rocker Cover	15 ± 3	N·m (11 lb-ft)
Torque	4 Harness Brackets	20 ± 4	N·m (15 lb-ft)
Torque	Air Bleed/Check Valve Halves	14	N·m (10 lb-ft) (124 lb-in)
Torque	Air Bleed/Check Valve to Filter Head	14	N·m (10 lb-ft) (124 lb-in)
Torque	Air Bleed/Check Valve to Fuel Line	25	N·m (18 lb-ft)
Torque	Air Temperature Sensor to Air Inlet Hose	17	N·m (13 lb-ft)
Torque	Camshaft Timing Sensor to Cylinder Block	13.5	N·m (10 lb-ft)
Torque	Captured Nuts Securing Wire Harness Leads	2.25	N·m (1.7 lb-ft) (20 lb-in.)
Torque	Charge Air Cooler Outlet Air Temperature Sensor	17	N·m (13 lb-ft)
Torque	Common Rail Leak-Off Line	15 ± 3	N·m (12 ± 2 lb-ft)
Torque	Coolant Temperature Sensor to Thermostat Housing	15	N·m (11 lb-ft)
Torque	Coupling Ring to Tab Housing	5	N·m (3.5 lb-ft) (44 lb-in.)
Torque	Crankshaft Position Sensor to Cylinder Block	13.5	N·m (11 lb-ft)
Torque	ECU hanger plate cap screws (3x)	35 ± 7	N·m (26 lb-ft)
Torque	ECU mounting strap cap screws (2x)	35 ± 7	N·m (26 lb-ft)
Torque	EGR Temperature Sensor to EGR Cooler	60 ± 12	N·m (44 lb-ft)
Torque	EGR Valve Screws — Final	15	N·m (11 lb-ft)
Torque	EGR Valve Screws — Initial	5	N·m (4 lb-ft)
Torque	Filter Assembly Bracket Cap Screws	68 ± 13	N·m (50 ± 10 lb-ft)
Torque	Flow Damper	176	N·m (130 lb-ft)
Torque	Fuel Doser Bracket to Engine — Lower 2 Cap Screws	350	N·m (260 lb-ft)
Torque	Fuel Doser Bracket to Engine — Upper 2 Cap Screws	37	N·m (27 lb-ft)
Torque	Fuel Inlet Line Fittings	40 ± 4	N·m (30 ± 3 lb-ft)
Torque	Fuel Leak-Off Line	12 ± 2	N·m (9 ± 1 lb-ft)
Torque	Fuel Line Clamp Screw	8.5	N·m (75 lb-in or 6 lb-ft)
Torque	Fuel Line Clamp-to-Intake Manifold Screw	30 ± 6	N·m (22 ± 4 lb-ft)
Torque	Fuel Line Fittings	20 ± 4	N·m (15 ± 3 lb-ft)
Torque	Fuel Line Nut	40 ± 4	N·m (30 ± 3 lb-ft)
Torque	Fuel Line — Primary Fuel Filter to Dosing Element	37	N·m (27 lb-ft)
Torque	Fuel Pump Leak-Off Line	12 ± 2	N·m (9 ± 1 lb-ft)
Torque	Fuel Rail Pressure Sensor	98	N·m (72 lb-ft)
Torque	Fuel Supply Line	24 ± 5	N·m (18 ± 4 lb-ft)
Torque	Fuel Transfer Pump Cap Screws	35 ± 7	N·m (26 ± 5 lb-ft)
Torque	Harness Bracket-to-ECU Bracket	20 ± 4	N·m (15 lb-ft)
Torque	Harness Bracket-to-Front Rocker Cover	20 ± 4	N·m (15 lb-ft)
Torque	Harness Bracket-to-Front of Intake Manifold	20 ± 4	N·m (15 lb-ft)
Torque	Harness Bracket-to-Fuel Rail	70 ± 14	N·m (52 lb-ft)
Torque	Harness Bracket/Shield-to-Intake Manifold	35 ± 7	N·m (26 lb-ft)
Torque	High Pressure Common Rail Capscrews	70 ± 14	N·m (52 ± 10 lb-ft)
Torque	High Pressure Common Rail Leak-off Line Fittings	15 ± 3	N·m (11 ± 2 lb-ft)
Torque	High Pressure Fuel Line	40 ± 4	N·m (32 ± 3 lb-ft)
Torque	Inlet Connector Nut	65 ± 5	N·m (48 ± 4 lb-ft)
Torque	Low Pressure Fuel Pressure Sensor	14	N·m (10 lb-ft) (124 lb-in)
Torque	Manifold Air Pressure Sensor to Intake Manifold	17	N·m (13 lb-ft)
Torque	Manifold Air Temperature Sensor to Intake Manifold	17	N·m (13 lb-ft)
Torque	New Injector Clamp Screw (engines beginning 6090L017988)	37 ± 5	N·m (27 ± 4 lb-ft)
Torque	Oil Pressure Sensor to Cylinder Block	9	N·m (80 lb-in)
Torque	Old Injector Clamp Screw (engines prior to 6090L017987)	47 ± 5	N·m (35 ± 4 lb-ft)

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	Notes
Coolant	50% ethylene glycol (John Deere COOL-GARD II Premix)	John Deere COOL-GARD II Premix (preferred); COOL-GARD II Concentrate 40-60%; COOL-GARD Premix; COOL-GARD Concentrate 40-60%; COOL-GARD PG Premix (55% propylene glycol)	above -37°C	Freeze protection to -37°C (-34°F); do not mix ethylene glycol and propylene glycol; do not use automotive-type coolants (ASTM D3306); water quality required
Engine oil	10W-30	John Deere Break-In or Break-In Plus Engine Oil; API CE/CD/CC; ACEA E2/E1 (alternate during first 100 hours)		Break-in oil; change at 100 hours max (Break-In Oil) or 500 hours max (Break-In Plus Oil)
Engine oil	SAE 15W-40; SAE 10W-40; SAE 10W-30; SAE 0W-40; SAE 5W-30	John Deere Plus-50 II (preferred); John Deere Plus-50; API CJ-4, CI-4 PLUS, CI-4; ACEA E9, E7, E6, E5, E4; John Deere Torq-Gard Supreme		Use oil viscosity based on expected air temperature range; multi-viscosity diesel engine oils are preferred
Fuel	Diesel fuel; No. 1-D winter grade below 0°C (32°F)	EN 590 or ASTM D975; cetane 43 minimum (47 preferred); sulfur max 0.0015% (15 mg/kg) ULSD for Interim Tier 4/Stage IIIB; lubricity max scar 0.45 mm per ASTM D6079 or ISO 12156-1		Biodiesel B5 preferred up to B20 (ASTM D6751/EN 14214); up to B100 with EN 14214; expect 2% power / 3% fuel economy reduction at B20
Grease	NLGI GC-LB	John Deere SD POLYUREA GREASE (preferred); John Deere HD LITHIUM COMPLEX GREASE; John Deere HD WATER RESISTANT GREASE; John Deere GREASE-GARD		Base grease on NLGI consistency numbers and expected air temperature range; consult supplier before mixing thickener types

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
000028.03	Digital Throttle Signal Out of Range High
000028.04	Digital Throttle Signal Out of Range Low
000029.03	Secondary Analog Throttle Signal Out of Range High
000029.04	Secondary Analog Throttle Signal Out of Range Low
000091.03	Primary Analog Throttle Signal Out of Range High
000091.04	Primary Analog Throttle Signal Out of Range Low
000094.03	Low Pressure Fuel Signal Out of Range High
000094.04	Low Pressure Fuel Signal Out of Range Low
000094.17	Low Pressure Fuel Signal Slightly Low
000097.00	Water in Fuel Detected Most Severe Level
000097.03	Water In Fuel Signal Out of Range High
000097.04	Water In Fuel Signal Out of Range Low
000097.16	Water in Fuel Detected
000100.01	Engine Oil Pressure Signal Extremely Low
000100.04	Engine Oil Pressure Signal Out of Range Low
000100.18	Engine Oil Pressure Signal Moderately Low
000100.31	Engine Oil Pressure Detected with Engine Stopped
000102.02	Manifold Air Pressure Signal Invalid
000102.03	Manifold Air Pressure Signal Out of Range High
000102.04	Manifold Air Pressure Signal Out of Range Low
000103.00	Turbo Speed Extremely High
000103.05	Turbo Speed Signal Circuit Has High Resistance
000103.08	Turbo Speed Signal Incorrect
000103.31	Turbo Speed Signal Missing
000105.00	Manifold Air Temperature Signal Extremely High
000105.03	Manifold Air Temperature Signal Out of Range High
000105.04	Manifold Air Temperature Signal Out of Range Low
000105.15	Manifold Air Temperature Signal Slightly High
000105.16	Manifold Air Temperature Signal Moderately High
000107.00	Air Filter Restriction Switch Activated
000107.31	Air Filter Restriction Switch Activated
000108.02	Barometric Pressure Signal Invalid
000110.00	Coolant Temperature Signal Extremely High
000110.03	Coolant Temperature Signal Out of Range High
000110.04	Coolant Temperature Signal Out of Range Low
000110.15	Coolant Temperature Signal Slightly High
000110.16	Coolant Temperature Signal Moderately High
000110.17	Coolant Temperature Signal Slightly Low
000111.01	Coolant Level Extremely Low
000157.03	Fuel Rail Pressure Signal Out of Range High
000157.04	Fuel Rail Pressure Signal Out of Range Low
000157.10	Fuel Rail Pressure Loss Detected
000157.17	Fuel Rail Pressure Not Developed
000158.17	ECU Power Down Error
000171.03	Ambient Air Temperature Signal Out of Range High
000171.04	Ambient Air Temperature Signal Out of Range Low
000174.00	Fuel Temperature Signal Extremely High
000174.03	Fuel Temperature Signal Out of Range High
000174.04	Fuel Temperature Signal Out of Range Low
000174.16	Fuel Temperature Signal Moderately High
000189.00	Engine Speed Derate Condition Exists
000190.00	Engine Speed Extremely High
000190.01	Engine Overload Severe
000190.16	Engine Speed Moderately High
000190.18	Engine Overload Moderate
000237.02	VIN Security Data Invalid
000237.13	VIN Option Code Security Data Conflict
000237.31	VIN Security Data Missing
000412.00	EGR Temperature Signal Extremely High
000412.03	EGR Temperature Signal Out of Range High
000412.04	EGR Temperature Signal Out of Range Low
000412.15	EGR Temperature Signal Slightly High
000412.16	EGR Temperature Signal Moderately High
000611.03	Injector Shorted to Voltage Source
000611.04	Injector Shorted to Ground
000627.01	All Injector Circuits Have High Resistance
000627.18	Injector Power Supply Voltage Moderately Low
000629.12	ECU EEPROM Error
000629.13	ECU Boot Block Error
000636.02	Camshaft Position Signal Invalid
000636.05	Camshaft Position Circuit Has High Resistance
000636.06	Camshaft Position Circuit Has Low Resistance
000636.08	Camshaft Position Signal Missing
000636.10	Camshaft Position Signal Rate of Change Abnormal
000637.02	Crankshaft Position Signal Invalid
000637.05	Crank Sensor Circuit Has High Resistance
000637.06	Crankshaft Position Circuit Has Low Resistance
000637.07	Crankshaft and Camshaft Position Signals Out of Sync
000637.08	Crankshaft Position Signal Missing
000637.10	Crankshaft Position Signal Rate of Change Abnormal

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

Procedures

Clean Electronic Injectors (In Engine) maintenance

Tools: SW10015JD Fuel Injector Flush Kit

Change engine primary and secondary fuel filters.
Prime fuel system and start engine; run until normal operating temperature.
Disconnect fuel supply to primary filter; connect red supply hose to SW10015JD kit reservoir.
Disconnect fuel return-to-tank; connect black return hose through kit filter to reservoir.
Fill reservoir with TY26688 Diesel Fuel System Clean-Up solution; open valve.
Key-on engine to check for leaks and verify return fuel flow.
Start engine and run at 1100 rpm for 20-40 minutes; do not let engine run out of fuel.
Remove and inspect kit return filter element (SW10967P1) for debris; repeat if badly contaminated.
Close reservoir valve; disconnect hoses; reconnect fuel supply and return lines.
Start engine and run 10-15 minutes to purge cleaner solution.

Relieve Fuel System Pressure maintenance

⚠ Escaping diesel fuel under pressure can penetrate skin causing serious injury

⚠ High-pressure fuel is dangerous

Stop engine and wait minimum 15 minutes (5 minutes minimum specified for rail) before disconnecting high-pressure lines.
Open first high-pressure line slowly to verify pressure has been relieved.

Remove and Install Primary Fuel Filter Element maintenance

⚠ Do not pre-fill filter with fuel; may introduce debris

Clean filter header and surrounding area.
Connect drain line to drain valve; drain all fuel from canister.
Disconnect water-in-fuel sensor connector.
Turn canister counter-clockwise to remove.
Pull filter element down to remove from header.
Inspect sealing surfaces; clean as required.
Place new packing on canister; coat with thin film of fuel.
Place filter element in canister with tangs down.
Install filter onto header until snug.
Turn filter additional 3/4 turn after seal contact.
Connect water-in-fuel sensor connector.

Remove and Install Secondary (Final) Fuel Filter maintenance

⚠ Do not pre-fill filter with fuel

Clean filter header and surrounding area.
Connect drain line to drain valve; drain fuel.
Turn filter counter-clockwise to remove.
Inspect header sealing surface; clean as required.
Install new filter drain valve and tighten to specification.
Place new packing on filter; coat with thin film of fuel.
Install filter onto header until snug.
Turn filter additional 3/4 turn after seal contact.
Prime fuel system by turning ignition ON for 60 seconds before starting.

Remove & Install EGR Valve repair

Tools: JDG10194 EGR Valve removal tool

Disconnect wiring lead and remove 2 screws securing EGR valve to intake manifold.
Place JDG10194 EGR Valve removal tool at base of valve and install forcing screws.
Carefully remove valve by alternately turning forcing screws clockwise.
Remove gasket and clean mating surfaces; vacuum debris from intake manifold.
Replace O-rings each time valve is removed.
Inspect valve lands for wear and damage.
Lubricate O-rings with clean engine oil; install new gasket and EGR valve.
Install 2 attaching screws to initial specification.
Tighten EGR valve attaching screws to final specification.
Reconnect wiring lead; recalibrate if new or reused EGR valve using Service Advisor.

Remove and Install Electronic Injectors (EIs) repair

⚠ Complete the injector calibration procedure

⚠ Do not twist the top of the injector

⚠ Inlet connector and O-ring must be replaced whenever the inlet connector nut is loosened

Tools: JDG10263 Feed Tube Torque Tool, JDG820 Flywheel Turning Tool, JDG1949 Wiring Harness Nut Socket

Remove rocker arm cover with vent tube; disconnect wiring harness connectors.
Remove clamp-to-intake manifold screw of the fuel delivery line set.
Remove fuel line nuts of the delivery line set (hold inlet connector flats).
Record QR code/serial number of each injector and note cylinder.
Remove inlet connector nut; remove and discard inlet connector.
Loosen terminal nuts; remove harness carrier screws; lift out harness carrier.
Remove injector clamp screw and clamp; hand-pull or pry injector from head.
On install, install new O-ring and combustion sealing washer; lubricate O-ring.
Position injector and clamp; tighten clamp screw then loosen slightly.
Place O-ring on inlet connector; install inlet connector and nut; tighten to specification.
Tighten injector clamp screw to specification (old or new clamp).
Install and finger-start fuel lines; assemble clamps with new clamp screws.
Tighten line clamp screw to specification.
Tighten fuel delivery line nuts; install rocker arm cover with new gasket.

Remove and Install Engine Control Unit (ECU) repair

⚠ Do not pressure wash the ECU

⚠ Before welding on engines with ECU, remove ECU from engine

DO NOT OPEN the Engine Control Unit.
Install hanger plate to the 3 mounting pads with rubber isolation pads facing outwards.
Tighten 3 cap screws to specification.
Orient ECU with air vent to rear of engine and connectors facing downwards.
Place strap assembly over ECU with rubber isolators against ECU.
Tighten 2 cap screws to specification.
Power to ECU is fused with a 20 Amp fuse; power and ground from battery.

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

Parts cataloged across the John Deere 6090 family

Part #	Description	Category
AT387574	ALTERNATOR	Alternator
RE500226	ALTERNATOR	Alternator
RE551447	ALTERNATOR	Alternator
RE551448	ALTERNATOR	Alternator
RE558676	ALTERNATOR	Alternator
RE65414	ALTERNATOR	Alternator
SE501838	ALTERNATOR (REMAN FOR AT387574) (24V, 100A) (3152)	Alternator
SE502563	ALTERNATOR	Alternator
4UA10	15 Relay I/O Board	Battery
DZ118761	FAN BELT	Belt
DZ118995	FAN BELT	Belt
R519476	FAN BELT	Belt
SE501759	CONNECTING ROD (REMAN FOR DZ122131)	Connecting rod
SE502800	CONTROLLER	Controller
SE501747	CYLINDER HEAD	Cylinder head
PFF51674	Secondary Fuel Element (OEM: RE506428)	Fuel filter
PFF5551	Primary & Secondary Fuel Kit (OEM: RE525523, RE527961)	Fuel filter
RE520906	PRIMARY FUEL FILTER	Fuel filter
RE525523	Fuel filter	Fuel filter
RE527961	FUEL FILTER	Fuel filter
SE501947	FUEL INJECTION NOZZLE (REMAN FOR DZ100221)	Fuel injection nozzle
SE501948	FUEL INJECTION NOZZLE	Injector
RE509672	OIL FILTER	Oil filter
RE530346	OCV FILTER	Oil filter
APM303	Control Panel	Service part / kit
CB125100-200	Coolant heater, 2500W, 120V	Service part / kit
CB125110-200	Coolant heater, HotStart, 2500W, 120V	Service part / kit
D-292865	Battery charger, 120/240V, 5.1/3A	Service part / kit
DZ121193	SHORT BLOCK ASSEMBLY	Service part / kit
GM106699-S	Battery (Kohler)	Service part / kit
M3227	Canopy	Service part / kit
R518277	CRANKSHAFT PULLEY	Service part / kit
RE520465	TORSIONAL DAMPER	Service part / kit
RE537960	TORSIONAL DAMPER	Service part / kit
RE57604	TORSIONAL DAMPER	Service part / kit
SE501748	CONNECTING ROD (REMAN FOR DZ122131)	Service part / kit
SE502847	COMPLETE BLOCK ASSEMBLY	Service part / kit
SE501228	WATER PUMP (REMAN FOR RE530194)	Pump
SE501922	FUEL INJECTION PUMP (REMAN FOR RE571640)	Pump
RE506103	STARTER	Starter
RE529661	STARTER	Starter
RE556999	STARTER	Starter
RE564633	STARTER	Starter
SE501866	STARTER (REMAN FOR RE506103) (24 V)	Starter
SE502374	TURBOCHARGER	Turbocharger

Parts cataloged across all variants of this engine family — verify the exact part fits your specific variant and serial number before ordering.

Also used in

John Deere 250DII — Haul Truck
John Deere 300DII — Haul Truck
John Deere 7230R — Tractor
John Deere 7260R — Tractor
John Deere 7280R — Tractor
John Deere 8100 — Harvester
John Deere 8200 — Harvester
John Deere 8310RT — Tractor Tracked
John Deere 8335RT — Tractor Tracked
John Deere 8360RT — Tractor Tracked
John Deere 9360R — Tractor
John Deere R4045 — Sprayer

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 displacement of the John Deere 6090 (9.0 L)?

The John Deere 6090 (9.0 L) has a displacement of 9.0 liters with 6 cylinders.

Which generators use the John Deere 6090 (9.0 L) engine?

The John Deere 6090 (9.0 L) powers 1 generator set(s), including John Deere 9.0 L Level 14 Electronic Fuel System.