HomeCummins/OnanCummins/Onan E

Cummins/Onan E Generator Set

The Cummins/Onan E is a 35 kW Natural Gas, Propane, Gasoline standby generator set powered by a Onan Modified Ford In-line 6 CSG-649 engine. It is available at 12 V, 3-phase and 60 Hz. It holds about 7 L (1.8 gal) of oil and 19 L (5.0 gal) of coolant. Starting uses group-60 battery rated 660 CCA at 12 V.

35 kW
Standby
7.0 L
Oil capacity
4
Document types

How to read your Cummins/Onan serial & model number →

Compare with other 35–40 kW Bi-Fuel (NG/LP) generators →

Specifications

FuelNatural Gas, Propane, Gasoline
Frequency60.0 Hz
Standby power35 kW
Prime power30 kW
Oil capacity7.0 L
Voltage options12 V
Phase3-Phase
Power factor0.8
Battery group60
Battery cranking660 CCA
Battery voltage12 V
Coolant capacity19 L

Engine

Onan Modified Ford In-line 6 CSG-649
Oil capacity7.0 L
Coolant capacity19.0 L

Maintenance & consumables

for the Onan Modified Ford In-line 6 CSG-649
ItemSpecCapacityPart #Interval
Air filter400 hr find
Fuel filter200 hr find
Oil filter2000 hr find
Belt2500 hr find
Coolant36500 hr
Coolant filter find
Hydraulic filter find
Oil1000 hr

Common questions

What is the power rating of the Cummins/Onan E?

The Cummins/Onan E is rated 35 kW standby.

What engine does the Cummins/Onan E use?

The Cummins/Onan E is powered by the Onan Modified Ford In-line 6 CSG-649 engine.

What fuel does the Cummins/Onan E use?

The Cummins/Onan E runs on Natural Gas, Propane, Gasoline.

What is the oil capacity of the Cummins/Onan E?

The Onan Modified Ford In-line 6 CSG-649 engine in the Cummins/Onan E has an oil capacity of 7.0 liters.

Troubleshooting

40

Fault codes

CodeMeaningCauseRemedy
LO ENG TEMP lamp lightsSet is in standby mode but is not operating.Lamp lights when engine coolant temperature is 70° F (21° C) or lower. Since the lamp goes out after the engine warms up, there should be no cause for alarm even during initial generator set operation.
LO ENG TEMPIndicates engine coolant heater is not operating or is not circulating coolant.A. Coolant heater not connected to power supply. Check for blown fuse or disconnected heater cord and correct as required. b. Check for low coolant level and replenish if required. Look for possible coolant leakage points and repair as required. c. Contact an authorized service center if none of the above.
FAULT 1 or FAULT 2Engine shuts down immediately, engine runs for several seconds and then shuts down, or engine continues to run.

Symptoms & remedies

SymptomCauseRemedy
PRE HI ENGINE TEMP lamp lights. Engine continues to operate.Indicates engine has begun to overheat and engine temperature has risen to approximately 205° F (97° C).A. Reduce load if possible by turning off non-critical loads. b. Check air inlets and outlets and remove any obstructions to airflow. If engine can be stopped, follow procedure in step 3.
HI ENG TEMP lamp lights. Engine shuts down.Indicates engine has overheated (engine temperature has risen above 215° F/102° C) or coolant level is low (sets with coolant level sensor).A. Check coolant level and replenish if low. Look for possible coolant leakage points and repair if necessary. b. Check for obstructions to cooling airflow and correct as necessary. c. Check for a slipping fan belt and tighten if loose. d. Reset control and restart after locating and correcting problem. Contact an authorized service center if none of the above.
PRE LO OIL PRES lamp lights. Engine continues to operate.Indicates engine oil pressure has dropped to 20 psi (138 kPa).If generator is powering critical loads and cannot be shut down, wait until next shutdown period and then follow step 5 procedure. If engine can be stopped, follow procedures in step 5.
LO OIL PRES lamp lights. Engine shuts down.Indicates engine oil pressure has dropped to 14 psi (97 kPa).Check oil level and filters. If oil system is OK but oil level is low, replenish. Reset control and restart. Contact an authorized service center if oil pressure is not in the range of 35 to 60psi (241 to 414 kPa).
OVERCRANK lamp lights and engine stops cranking.Indicates possible fuel or ignition system problem.A. Check for empty fuel tank, fuel leaks, or plugged fuel lines and correct as required. b. Check for dirty fuel filter and replace if necessary (see MAINTENANCE section). c. Check for dirty or plugged air filter and replace if necessary (see MAINTENANCE section). d. Check ignition system (see MAINTENANCE). e. Reset the control and restart after correcting the problem. Contact an authorized service center for service if none of the above.
Engine runs and then shuts down, OVERSPEED lamp lights.Contact an authorized service center for service.
SWITCH OFF lamp flashes.Move the Run/Stop/Remote switch to the Remote position for automatic starting.
LO FUEL lamp lights. Engine continues to run.Indicates gasoline fuel supply is running low. Check fuel supply and replenish as required.
LO FUEL LAMP lights. Engine shuts down and LO OIL PRES lamp lights.Indicates engine has run
Out of fuelCheck fuel level and replenish as required.
Fault lamp lights but no fault exists. Engine gauges show oil pressure, engine temperature, and frequency (speed) are within normal limits.The monitor board or a sensor may be at fault. Contact an authorized service center for service.
Engine starts from generator control panel but will not start automatically or from a remote panel.Remote circuit breaker is tripped. Reset breaker and restart. Contact an authorized service center if breaker trips after resetting.
Engine will not crank.A. Fault lamp on. Correct fault and reset control. b. Poor battery cable connections. Clean the battery cable terminals and tighten all connections. c. Discharged or defective battery. Recharge or replace the battery. d. Contact an authorized service center for assistance if none of the above.
No AC output voltage.Field breaker is tripped. Reset breaker. Contact an authorized service center if voltage buildup causes breaker to trip.
Green RUN lamp does not light following engine startup.Indicates possible Start/Disconnect relay failure. Contact an authorized service center for assistance.
Engine does not run after a second attempt starting.Refer to the Troubleshooting section.
The green RUN lamp lights following engine startup.1. All engine systems are operating normally. 2. The red SWITCH OFF lamp is flashing, if provided. 3. Push the control panel switch to REMOTE when placing the set in service under remote, automatic control.
The engine might not start.Plug in or service the engine coolant heater, if provided. Install an engine coolant heater, if necessary.
The engine does not crank.If a red fault lamp is on, service the fault, and reset the engine control. Service the battery, terminals and cables as necessary. See Maintenance.
The engine cranks, but does not start and the fault lamp lights (OVERCRANK if provided).Check the fuel supply. Turn the FUEL SELECTOR SWITCH (if provided) to select the fuel that is available. Service the battery if the engine cranks too slowly to start, refill with engine oil of suitable viscosity and plug in or service the engine coolant heater, if provided. Install an engine coolant heater if necessary. See Maintenance. Service the carburetor, choke or ignition system as necessary. See Maintenance. Reset the engine control.
The amber PRE-HI TEMP lamp lights, if provided and the engine coolant temperature gauge indicates 215° F (102° C) or more while the engine is running.Shut down the set if possible. Service the cooling system as necessary. See Maintenance. If the set must not be shut down, disconnect as many non-critical loads as possible so that the engine will run cooler and service as soon as possible.
The engine shuts down because of high engine temperature and the fault lamp lights (HI ENG TEMP, if provided).Fill coolant, if necessary, after the engine has cooled down and fix the leaks. Observe the warning about hot coolant at the beginning of this section. Service the cooling system as necessary. See Maintenance. Reset the engine control.
The amber PRE-LO OIL PRES lamp lights, if provided and the engine oil pressure gauge indicates 20 psi or less.Shut down the set if possible. Fill oil, if necessary. If the set must not be shut down, disconnect as many non-critical loads as possible so that the engine will run cooler and service as soon as possible.
The engine shuts down because of low oil pressure and the fault lamp lights (LO OIL PRES, if provided).Fill oil, if necessary. See Maintenance. Reset the engine control.
The engine shuts down because of overspeed and the fault lamp lights (OVERSPEED, if provided).Check the governor and throttle linkage. Reset the engine control.
A control panel circuit breaker has tripped.Reset the circuit breaker.
A control panel warning lamp does not light when the panel switch is pushed to LAMP TEST.Replace the defective lamp.
There is no output because the line circuit breaker (if provided) has tripped.Determine the cause (overload or short circuit) and service as necessary. Reset the circuit breaker.
Engine runs but current does not build upPoor brush contact. Open circuit, Short circuit, or ground in generator.See that brushes seat well, are free in holders, are not worn too short, and have good spring tension. See GENERATOR, replace part necessary.
Current steady but engine not misfiringSpeed too low. Poor commutation or brush contact. Loose connections. Fluctuating load.Adjust governor to correct speed. Tighten connections. Correct any abnormal load condition causing trouble.
Engine overheatingOverloaded.Reduce load.
Voltage drops under heavy loadEngine lacks power. Poor compression. Faulty carburetion. Restricted air cleaner. Excessive choking. Carbon in cylinders. Restricted exhaust line.See remedies for engine missing under heavy load. Tighten cylinder head and spark plugs. If still not corrected, grind the valves. Replace piston rings, if necessary. Check the fuel system. Clean, adjust or replace parts necessary. Clean and refill. See that choke opens properly. Remove carbon. Clean or increase the size.
Engine misfires at light loadCarburetor idle adjustment set wrong or clogged. Spark plug gaps too narrow. Intake air leak. Faulty ignition. Uneven compression.Adjust to correct gap. Tighten or replace gaskets. Clean, adjust, or replace breaker points, plugs, condenser, coils, etc., or retime ignition. Tighten cylinder head and spark plugs. If still not corrected, grind valves. Replace piston rings, if necessary. Worn intake valve stems. Replace valves.
Engine misfires at heavy loadSpark plugs defective. Faulty ignition.Replace. Clean, adjust, or replace breaker points, plugs, condenser, coil, etc., or retime ignition.
Engine backfires at carburetorLean fuel mixture. Clogged fuel screen. Intake air leak.Clean carburetor. Clean screen. Replace flange gaskets, tighten carburet. Poor fuel. Refill with good, fresh fuel. Spark too late. Retime ignition. Spark plug wires crossed. Install wires correctly. Intake valves leaking. Grind or replace.
Excessive oil consumption, light blue smoky exhaustPoor compression, usually due to leaking valves.Tighten cylinder head and plugs. If still not corrected, grind or replace valves. Oil leaks from engine or connections. This does not cause smoky exhaust. Tighten screws and connections. Oil too light or diluted. Drain, refill with correct oil. Too large bearing clearance. Replace. Oil pressure too high. Refer to symptoms of high oil pressure for remedies. Engine misfires. Refer to symptoms of engine misfires. Faulty ignition. Clean, adjust, or replace breaker points, plugs, condenser, coil, etc., or retime ignition. Unit operated at light or no load for long periods. No remedy needed. Too much oil. Drain excess oil.
Black, smoky exhaust, excessive fuel consumption, fouling of spark plugs with black soot. Possible lack of power under heavy loadFuel mixture too rich.Adjust choke. Install needed carburetor parts, adjust float level. Choke not open. See that choke opens properly. Dirty air cleaner. Clean, refill to proper level.

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

Parts

96
Part #DescriptionQtySystem
018102000/18 10 Micron1Filter elements PartsGeek
018302000/18 30 Micron (standard)1Filter elements PartsGeek
01860S2000/18 60 Micron, stainless steel1Filter elements PartsGeek
10-256MALE ADAPTER Male Flare x Male NPTF 1/4” x 1/4”1Air filter PartsGeek
10-257MALE ADAPTER Male Flare x Male NPTF 1/4” x 3/8”1Oil filter PartsGeek
10-258MALE ADAPTER Male Flare x Male NPTF 1/4” x 1/2”1Fuel filter PartsGeek
10-259MALE ADAPTER Male Flare x Male NPTF 5/16” x 1/8”1Coolant filter PartsGeek
129698-77190BRACKET3Bracket PartsGeek
142-367Air Filter1Air filter PartsGeek
142-389Oil Filter1Oil filter PartsGeek
142-567Fuel Filter1Fuel filter PartsGeek
142-765Belt1Belt PartsGeek
142-890Coolant Filter1Coolant filter PartsGeek
142-987Spark Plug1Spark plug PartsGeek
1552267G-C21Connector PartsGeek
1552269G-C71Connector PartsGeek
280BHAND WHEEL1Handle PartsGeek
411294FOBall or Tapered Roller Bearing6Bearing PartsGeek
434198FOBall or Tapered Roller Bearing1Bearing PartsGeek
437425FOBall or Tapered Roller Bearing1Bearing PartsGeek
453.16Seal Pack – identified ‘E’Gasket PartsGeek
5395259Crankshaft Rear Oil Seal Installation KitSeal PartsGeek
5395330Crankshaft Rear Oil Seal Removal KitSeal PartsGeek
786ASPACER1Spacer PartsGeek
AA519RFUEL SCREEN IN SEDIMENT BOWLFuel filter PartsGeek
AB1-19-1Diaphragm ass'y, primary1Diaphragm PartsGeek
AB1-20Screw, 12-24 x 7/8" SEMS (7)1Screw PartsGeek
AC1-22-2Cover ass'y1Cover PartsGeek
AD1-14-1Diaphragm ass'y, secondary, Hydrin2Diaphragm PartsGeek
AD1-14-2Diaphragm ass'y, secondary, Hydrin (not available in silicone)Diaphragm PartsGeek
AD1-23Diaphragm ass'y, secondary, Hydrin4Diaphragm PartsGeek
AD1-23-2Diaphragm ass'y, secondary, VMQ E1Diaphragm PartsGeek
AD1-23-3Diaphragm ass'y, secondary, VMQ PE1Diaphragm PartsGeek
AD1-23-4Diaphragm ass'y, secondary, FVMQ PE1Diaphragm PartsGeek
AL1-86Lever, secondary1Lever PartsGeek
AN500T0007STARTER MOTOR (w/ pad terminal)Starter PartsGeek
AR26350OIL FILTEROil filter PartsGeek FridayParts $18.99
C072754Sensors, C18 & C13Sensor PartsGeek
F3-1Sponge1Sponge PartsGeek
G1-30079Cover, heat exchanger1Cover PartsGeek
G1-37Cover, primary diaphragm1Cover PartsGeek
G1-84Gasket, spring housingGasket PartsGeek
H1-5Model PE-7-31Model PartsGeek
H3-3Housing spring1Spring PartsGeek
LS1169sFILTER GASKET1Oil filter PartsGeek
P0005255Fuel level gaugeFuel filter PartsGeek
P1-11Screw, 10-24 x 3/8" SEMS (2)1Screw PartsGeek
S1-101Screw, 6-32 x 1/4" SEMS (4)4Screw PartsGeek
S1-3Cover, diaphragm2Cover PartsGeek
S1-59Screw, 8-32 x 5/8" SEMS (4)4Screw PartsGeek
S1-86Spring, valve1Spring PartsGeek
S12/PAuto / Manual Transfer, Source 2-1 / 1-2Transfer PartsGeek
S13/PCommit / No Commit Transfer to Source 2Commit transfer PartsGeek
S2-13Pin, secondary lever fulcrum1Pin PartsGeek
S2-22Spring, secondary regulator (blue), standard1Spring PartsGeek
S2-23Spring, secondary regulator (orange), optional1Spring PartsGeek
S2-37Spring, secondary1Spring PartsGeek
S4-37Seat, secondary (new)1Seat PartsGeek
S4-7Seat, primary1Seat PartsGeek
0-15OV........... Transformer, Variable 2 Amp1Service part / kit PartsGeek
0-1OVand 0-15OV and50Service part / kit PartsGeek
11-92Date:4Service part / kit PartsGeek
201-29852984Service part / kit PartsGeek
220-36863691Service part / kit PartsGeek
26100BPan, 24 hr. containment1Service part / kit PartsGeek
26460BPan, 36 hour containment1Service part / kit PartsGeek
315-0386................. .Transformer, Input1Service part / kit PartsGeek
3E3361J-C31Service part / kit PartsGeek
437-4129J-C141Service part / kit PartsGeek
4389-4758-4679Static Rotor Amp Draw Test Results - Model A, B, C, D, E, F, G, HService part / kit PartsGeek
4390-4760Static Rotor Amp Draw Test Results - Model A, B, C, D, E, F, G, HService part / kit PartsGeek
4456-4759Static Rotor Amp Draw Test Results - Model A, B, C, D, E, F, G, HService part / kit PartsGeek
453.08Inlet Manifold Assembly – identified ‘B’Service part / kit PartsGeek
928-0502BService part / kit PartsGeek
928-0506Service part / kit PartsGeek
960-0135Service part / kit PartsGeek
960-0504AService part / kit PartsGeek
960-0505Service part / kit PartsGeek
960-12Service part / kit PartsGeek
981-06241Service part / kit PartsGeek
981-0625Generator Set7Service part / kit PartsGeek
9X0481J-C51Service part / kit PartsGeek
9X0841J-C131Service part / kit PartsGeek
FPS-KIT-06Replacement Memory Pack1Service part / kit PartsGeek
FPS210S02220V@50Hz w/ fuel conditioner w/ metal heat deflector1Service part / kit PartsGeek
FPS210S06Reverso 220V@50Hz Separ w/ metal heat deflector1Service part / kit PartsGeek
FPS210S36220V@50Hz w/ fuel conditioner1Service part / kit PartsGeek
FPS210S38Reverso 220V@50Hz Separ1Service part / kit PartsGeek
L21-4L21-11Service part / kit PartsGeek
P0001006EVC menu displayService part / kit PartsGeek
P0001315Fault handling displayService part / kit PartsGeek
S7-1Screen, atmospheric vent1Service part / kit PartsGeek
T3-T617-T 104Service part / kit PartsGeek
TB21-& 2 from1Service part / kit PartsGeek
VR21-10VR21-24Service part / kit PartsGeek
VR21-4VR21-69Service part / kit PartsGeek

Service, wear & replacement parts referenced for this model and its engine — confirm the exact part for your serial number. See the full parts catalog to search and cross-reference.

Fuel consumption

RatingLoadL/hgal/h
Prime
Standby

Available documents

Engine spec — 1206F-E70TTAG4 ElectropaK PN3068 (Cummins/Onan)Reference — LP-VaporizerParts manual — 0932-0112 Onan Post-Sale Literature Index (07-1998) (Cummins/Onan)Parts manual — 904-0011 Onan EL series (spec A-K) Genset Parts manual (Cummins/Onan)Parts manual — EK Gensets 0928-0220 I3 201001 (Cummins/Onan)Service manual — 900-0335 Onan 20KW ES Generator Controls Service manual 07-1982 (Cummins/Onan)Service manual — 903-0000 Onan 6GO-F 5GO-F Genset Instruction & Parts manual (09-1949) (Cummins/Onan)Service manual — 904-0000 Onan 10EL Genset Instruction & Parts manual (10-1948) (Cummins/Onan)Service manual — 904-0008 Onan 10 EL (spec G-K) Genset Instruction manual (Cummins/Onan)Service manual — 926-0003 Onan ED (Spec A-E) Genset Instruction manual (Cummins/Onan)Service manual — 928-0120 Onan EK EM Genset Operator's manual (12-1995) (Cummins/Onan)Service manual — 928-0122 Onan ES Genset Operators manual (07-1991) (Cummins/Onan)Service manual — 928-0602 Onan EK EM Genset Installation Manual (12-1995) (Cummins/Onan)Service manual — 960-0510B Onan DGBB thru DGFC Series Service Manual (10-1998) (Cummins/Onan)