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Cummins/Onan VTA-28-GI Engine

The Cummins/Onan VTA-28-GI is an engine rated at 1800 rpm. It powers generator sets from Cummins/Onan, including the 450 DM and 500 DM. It holds 84 L (88.8 US qt) of oil and 166 L (43.9 gal) of coolant.

Also known as: Cummins VTA-28-GI

Part of the Cummins/Onan VTA28 engine family — 8 variants share parts & fitment.

1800 rpm

Rated speed

84.0 L

Oil capacity

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

Engine specifications

Oil capacity	84 L (88.8 US qt)
Coolant capacity	166.0 L
Rated speed	1800 rpm

Generator sets powered by this engine

Cummins/Onan 450 DM Cummins/Onan 500 DM

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

Common problems

Engine will not crank
Cause: Fault lamp on
Fix: Correct fault and reset control.
The FAULT 1 or FAULT 2 fault lamp lights. Engine shuts down immediately, engine runs for several seconds and then shuts down, or engine continues to run FAULT 1
Cause: The standard undesignated fault functions are programmed to shut down the set when a fault is sensed. Fault 1 is timed delayed while Fault 2 is immediate. The nature of the fault is an optional selection that is determined when the set installation is designed. The undesignated fault functions may also be programmed for non-shutdown or non-time delay.
SWITCH OFF lamp flashes
Cause: Run/Stop/Remote switch is in the Stop position which will prevent automatic starting if an automatic transfer switch is used
Fix: Move the Run/Stop/Remote switch to the Remote position for automatic starting.
Starter has been locked out because of excessive cranking time. OVERCRANK
PRE LO OIL PRES lamp lights. Engine continues to operate
Cause: Engine oil pressure has dropped to 20 psi (138 kPa)
Fix: 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.
PRE HI ENGINE TEMP lamp lights. Engine continues to operate
Cause: Engine has begun to overheat and engine temperature has risen to approximately 205°F (97°C)
Fix: If generator is powering non-critical and critical loads and cannot be shutdown, use the following: Reduce load if possible by turning off non-critical loads; Check air inlets and outlets and remove any obstructions to airflow; Open doors or windows in generator area to increase ventilation. If engine can be stopped, follow procedure in step 3.
OVERCRANK lamp lights and engine stops cranking, or Engine runs, shuts down, and LO OIL PRES lamp lights
Cause: Possible fuel system problem
Fix: Check for empty fuel tank, fuel leaks, or plugged fuel lines and correct as required; Check for dirty fuel filter and replace if necessary (see MAINTENANCE section); Check for dirty or plugged air filter and replace if necessary (see MAINTENANCE section); Refer to Step 5; Reset the control and restart after correcting the problem. Contact an Onan Dealer or Distributor for service if none of the above.
No AC output voltage
Cause: Field breaker is tripped
Fix: Reset breaker. Contact an Onan Dealer or Distributor if voltage build up causes breaker to trip.
LO OIL PRES lamp lights. Engine shuts down
Cause: Engine oil pressure has dropped to 14 psi (97 kPa)
Fix: Check oil level, lines and filters. If oil system is okay but oil level is low, replenish. Reset control and restart. Contact an Onan Dealer or Distributor if oil pressure is not in the range of 50 to 70 psi (345 to 483 kPa).
LO FUEL lamp lights. Engine shuts down and LO OIL PRES lamp lights
Cause: Engine has run out of fuel
Fix: Check fuel level and replenish as required.
LO FUEL lamp lights. Engine continues to run
Cause: Diesel fuel supply is running low
Fix: Check fuel supply and replenish as required.
LO ENG TEMP lamp lights. Set 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.)
Cause: Engine coolant heater is not operating or is not circulating coolant
Fix: Check for the following conditions: Coolant heater not connected to power supply. Check for blown fuse or disconnected heater cord and correct as required; Check for low coolant level and replenish if required. Look for possible coolant leakage points and repair as required; Contact an Onan Dealer or Distributor if none of the above.
HI ENG TEMP lamp lights. Engine shuts down
Cause: Engine has overheated (engine temperature has risen above 215°F/102°C) or coolant level is low (sets with coolant level sensor)
Fix: Allow engine to cool down completely before proceeding with the following checks: Check coolant level and replenish if low. Look for possible coolant leakage points and repair if necessary; Check for obstructions to cooling airflow and correct as necessary; Check for a slipping fan belt and tighten if loose; Reset control and restart after locating and correcting problem. Contact an Onan Dealer or Distributor if none of the above.
Green RUN lamp lights following engine start-up
Fix: Indicates all engine systems are normal. No corrective action required.
Green RUN lamp does not light following engine start-up
Cause: Possible Start/Disconnect relay failure
Fix: Contact an Onan Dealer or Distributor for assistance.

Compiled from service & troubleshooting documentation across every generator set that uses the Cummins/Onan VTA-28-GI.

Maintenance schedule

Item	Spec	Part #	Interval
Air filter	pleated paper cartridge	—	4000 hr
Fuel filter		—	100 hr
Oil filter		—	100 hr
Battery	clean and reconnect the battery cables if loose	—
Belt		—
Coolant filter		—
Oil	prime and fill with oil of recommended classification and viscosity	—
Spark plug		—	2800 hr

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
Crankcase oil (new generator sets)	Drain	50 hr		First service — Drain and replace the crankcase oil after the first 50 hours of operation on new generator sets
Generator bearing	Inspect	1000 hr		Have bearing inspected for wear every 1000 hours by an Onan Distributor
Generator bearing (prime power)	Replace	10000 hr		For prime power, replace at least every 10,000 hours or after two years
Generator bearing (standby power)	Replace		60 mo	For standby power, replace at least every five years

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	Air cleaner nozzle distance from element	1	inch	25 mm minimum
Pressure	Air cleaner cleaning air pressure	30	psi	207 kPa; DFW, DFY and DFZ
Pressure	Crankcase breather drying air pressure	30	psi	maximum (OSHA)
Pressure	Low oil pressure shutdown setpoint	14	psi	97 kPa; time delayed about 10 seconds following starter disconnect
Pressure	Normal engine oil pressure range	50 to 70	psi	345 to 483 kPa
Pressure	Pre-low oil pressure alarm (optional 12-lamp system)	20	psi	137 kPa or less
Pressure	Radiator air discharge static pressure	0.25	inch H2O	0.018 inch Hg; 450 DM, 500 DM, 600 DFY, 750 DFZ
Pressure	Radiator air discharge static pressure	0.5	inch H2O	0.037 inch Hg; 450 DFW
Resistance	Battery specific gravity (recharge below)	1.260	specific gravity	use a hydrometer
Speed	Cycle cranking option	15	seconds	three 15-second cranking cycles with two 15-second rest periods
Speed	Fine speed adjustment range (SPEED ADJUST potentiometer)	±100	RPM	less than
Speed	Frequency meter speed relation	30	r/min	each hertz equals 30 r/min
Speed	No-load governed speed, 50 Hz 3% droop	1545	RPM	51.5 Hz
Speed	No-load governed speed, 50 Hz 5% droop	1575	RPM	52.5 Hz
Speed	No-load governed speed, 50 Hz isochronous	1500	RPM	50.0 Hz
Speed	No-load governed speed, 60 Hz 3% droop	1854	RPM	61.8 Hz
Speed	No-load governed speed, 60 Hz 5% droop	1890	RPM	63.0 Hz
Speed	No-load governed speed, 60 Hz isochronous	1800	RPM	60.0 Hz
Speed	Overcrank cranking limit (standard control)	75	seconds	starter disengages after 75 seconds of cranking
Speed	Overspeed shutdown, 50 Hz units	1850 ± 50	r/min
Speed	Overspeed shutdown, 60 Hz units	2100 ± 90	r/min
Speed	Starter disconnect speed	450 to 570	r/min
Temperature	High engine temperature shutdown	215	°F	102°C; time delayed about 10 seconds following starter disconnect
Temperature	LO ENG TEMP lamp setpoint	70	°F	21°C or lower engine water jacket temperature
Temperature	Pre-high engine temperature alarm	205	°F	97°C; optional 12-lamp system
Torque	Oil drain plug	60-70	ft.lb	also 81-95 N·m
Voltage	Electrical system starting voltage	24	Volts DC
Voltage	Random voltage variation	±1	%	constant loads
Voltage	Rating condition, ambient temperature	77	°F	25°C; also altitude 300 feet (92 m)
Voltage	Voltage adjust rheostat range	±5	%	optional; of rated output voltage
Voltage	Voltage regulation, VRAS-2 regulator	±2	%	from no load to full load

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	Water or water/antifreeze mixture with DCA precharge	Water clean, low in mineral content, free of chloride, sulphate, or acid; permanent type antifreeze		New engines shipped with precharge water filter; precharge water filter compatible with plain water and all permanent antifreezes except methoxy propanol base; do not use antifreeze with anti-leak additives; capacities (standard radiator): 44 gallons (166 litres) 450 DM, 500 DM, 600 DFY; 42.5 gallons (161 litres) 450 DFW; 55 gallons (208 litres) 750 DFZ
Engine oil	SAE 5W synthetic	API class CC/CD; sulphated ash not exceeding 1.85 percent; pour point 9°F (5°C) below lowest expected temperature; viscosity 10,000 mPa*s max at -31°F (-35°C) and 4.1 mm2/s min at 212°F (100°C)	below -25°C	For ambient temperatures consistently below -13°F (-25°C) with no provision to keep engine warm; do not use petroleum base 5W grade oil
Engine oil	SAE 10W-30	API Class CC/CD, maximum sulphated ash 1.85 percent	-25°C to 35°C	-13°F to 95°F; capacities: 22.3 Gallons (84 litres) 450 DM, 500 DM, 600 DFY; 27 Gallons (102 litres) 450 DFW; 34 Gallons (129 litres) 750 DFZ (filters, lines and crankcase)
Engine oil	SAE 15W-40	API Class CC/CD	above -10°C	14°F (-10°C) and above
Engine oil	SAE 20W-40	API Class CC/CD	above 0°C	32°F (0°C) and above
Fuel	No. 2 diesel			Engine primarily designed for No. 2 diesel fuels; will also operate on No. 1 fuel or similar if specifications met; filter or strain fuel as tank is filled
Grease	non-conductive grease			Light coating on battery terminals to retard corrosion
Other	anti-seize compound			Use when reassembling threaded aluminum parts (coolant heater)

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

Procedures

Governor Gain Adjustment adjustment

Close main line circuit breaker and apply approximately 1/4 of rated load.
Make sure engine speed is constant.
Turn GAIN potentiometer clockwise slowly until engine speed is not constant.
Turn potentiometer counterclockwise until a constant speed is achieved.
Turn counterclockwise an additional 1/2 division.
Use SPEED ADJUST potentiometer for fine speed adjustments of less than ±100 RPM.

Governor Preliminary Adjustments adjustment

Turn idle speed potentiometer counterclockwise to its stop, then clockwise 10 turns.
Turn run speed potentiometer counterclockwise to its stop, then clockwise 10 turns.
Turn gain potentiometer fully counterclockwise.
Turn droop potentiometer fully counterclockwise for isochronous operation.
Turn droop screw to approximately 40 for 3 percent droop.
Turn droop screw to approximately 80 for 5 percent droop.

Air Cleaner Service (DFW, DFY) maintenance

⚠ Filters should be handled with care to prevent damage.

Tools: compressed air

Loosen the eight attaching bolts and lift off the air cleaner head.
Remove the air filter element from the filter housing.
Blow low pressure compressed air (30 psi/207 kPa) through element from the clean side.
Hold nozzle at least 1 inch (25 mm) away to avoid damaging the element.

Air Cleaner Service (DFZ) maintenance

Tools: compressed air

Unsnap four latches holding head, lift off head and remove filter element.
Remove and discard precleaner cartridge.
Blow low pressure compressed air through pleated paper cartridge from the inside.
Hold nozzle at least 1 inch (25 mm) away to avoid damaging the element.
Replace pleated paper cartridge at every fourth cleaning.

Coolant Filter Service maintenance

⚠ Do not use antifreeze with an anti-leak formula; the stop leak element can prevent or retard coolant flow through the filter.

Close the shutoff valve.
Unscrew the coolant filter and discard.
Apply a light coat of lubricating oil to the gasket surface.
Install new filter and tighten by hand until seal just touches filter head.
Tighten an additional one-half to three-fourths turn.
Open the shutoff valve.

Coolant Heater Service maintenance

⚠ Failure to remove AC power presents a shock hazard and can cause serious personal injury or death.

⚠ Contact with hot coolant can result in severe burns.

Remove AC power from coolant heater.
Allow heater to cool before proceeding.
Remove the head and valve assembly.
Clean any scale deposits out of the tank.
Remove heating element and scrape off any accumulated scale.
Restore AC power to heater after system has been filled with coolant.

Cooling System Flushing maintenance

⚠ Excessive air pressure while starting the water flow could split the radiator core. Apply air pressure gradually.

Tools: flushing gun, compressed air

Open upper and lower radiator hose connections and install the radiator cap.
Attach flushing gun nozzle to lower radiator hose connection and fill radiator with water.
Gradually apply air pressure to avoid damaging the core.
Shut off air and allow radiator to refill; repeat until water runs clean.
Remove thermostat to flush block; attach flushing gun to upper radiator hose.
Restrict lower hose opening until block fills; apply air pressure and force water out.
Replace thermostat and all hoses and refill cooling system.

Crankcase Breather Service (DFW, DFY) maintenance

Tools: compressed air

Remove wing nut, flat washer and rubber washer; lift cover away from filter assembly.
Lift out breather element, vapor element and gasket.
Clean all parts with approved solvent; dry with compressed air (30 psi maximum OSHA).
Inspect all parts, replace if necessary.
Reassemble filter assembly, replace cover and secure.

Engine Oil Change maintenance

⚠ Crankcase pressure can blow out hot oil and cause serious burns. Do NOT check oil while the generator set is operating.

Tools: drain pan, torque wrench

Bring engine up to operating temperature and then shut it off.
Remove oil drain plug or open drain valve and collect oil in a pan.
Replace drain plug or close drain valve; torque to 60-70 ft.lb (81-95 N·m).
Fill crankcase to full mark on dipstick; allow for oil filters when drained.
Start engine and check for oil leaks.
Shut off engine, wait 15 minutes, check oil level, add oil if required.

Fuel Filter Replacement maintenance

⚠ Do not permit any flame, cigarette, or other ignition source near the fuel system.

Remove both spin-off type fuel filters and discard.
Fill new filters with diesel fuel and coat sealing gasket lightly with fuel.
Install and tighten by hand until gasket just touches the filter head.
Tighten an additional one-half to three-fourths of a turn.

Oil Filter Change maintenance

⚠ Always allow 15 minutes after engine shutdown before checking oil level.

Unscrew and discard filters (DFW, DFY; DFZ see Figure 6).
Fill filters with lubricating oil and lightly coat gasket sealing surface.
Position filter on adapter and hand tighten until seal contacts filter head.
Advance one-half to three-quarters turn; do not overtighten.
Fill crankcase to H mark, run engine to verify no leaks, add oil as necessary.

Starting at Control Panel operation

Move Run-Stop-Remote switch on the DC panel to the RUN position.
Starter begins cranking; engine should start after a few seconds.
Starter disconnects when engine reaches 450 to 570 r/min.
If engine does not start, control indicates an overcrank fault after up to 75 seconds.
To clear overcrank fault, place switch in STOP and momentarily depress Reset.
Wait two minutes for starter motor to cool, then repeat starting procedure.

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 Cummins/Onan VTA28 family

119

Part #	Description	Category
140-2301	Cleaner, Air (Includes Replacement Elements) 140−2465	Air filter
140-3288-02	Cleaner, Air	Air filter
140-3349-02	Bracket, Air Cleaner	Air filter
M-1627	BOLT DIAGRAM	Battery
130-3839-01	Guard, Belt − Right Side	Belt
130-3839-02	Guard, Belt − Left Side	Belt
130-3840	Guard, Belt − Top	Belt
130-3841	Guard, Belt − Bottom	Belt
130-3842	Guard, Belt − Front	Belt
130-3843	Guard, Belt − Right Side	Belt
130-3844	Guard, Belt − Bottom Back	Belt
130-3845	Guard, Belt − Top Back	Belt
130-3846	Guard, Belt − Left Side	Belt
511-0105	Belt−V	Belt
M-1761	AIR CLEANERS	Cleaner
EXS-1583-3	CONTROL HEATER	Control heater
960-0630C	PCC2100 PowerCommand Control	Controller
CS-1075-1	COOLANT FILTERS	Coolant filter
CS-1367-2	TYPICAL COOLANT HEATER	Coolant heater
0300-4623-18	DFGB (600V)	Current transformer
0300-4623-34	DFGB BR (0-480V)	Current transformer
ES-1779-1	VOLTAGE REGULATOR AND EXCITATION SWITCH	Excitation switch
FS1304	FILTER	Filter
130-4552	Cover, Coolant Heater	Fluid
333-0407-05	Heater, Oil (300 Watt, 480 Volt)	Fluid
502-1337	Adapter, Coolant Heater	Fluid
FF202	Fuel, Spin-On	Fuel filter
FS1216	Fuel/Water Sep Spin-On	Fuel filter
130-1193	Gasket, Outlet Adapter	Gasket
130-4354	Radiator (Includes Cap, Sight Gauge And Overflow Hose) (Also Includes Cover Plates, Gaskets, Screws And Lock Washers For All Water Outlets)	Gasket
330-0141-04	Gasket, Cover	Gasket
330-0142	Box, Terminal (Includes Cover and Gasket − Ref No. 19 and 20)	Gasket
128-0108	Insulation, Hose – Bulk (Order By The Foot – 12 Feet Required)	Hose
130-3874	Base, Mounting * − Parts Used On Heat Exchanger Installations With Automatic Water Regulator + − Parts Used On Heat Exchanger Installations Without Automatic Water Regulator # − Cut Off And Discard Swivel Connector End Of Hose So That 1/8 NPT Connector End Measures Length As Indicated Above	Hose
130-3875	Tube, Outlet	Hose
130-4576	Tube	Hose
130-4577	Tube	Hose
130-4581	Tube	Hose
416-0680	Cable, Battery (10")	Hose
501-0537-22	Hose, Oil (86”)	Hose
501-0537-23	Hose, Oil (22”)	Hose
501-0744-01	Hose, Coolant	Hose
501-0744-05	Hose, Coolant	Hose
502-0313	Elbow, Hose − 90° (1/8” Pipe to 1/4” Hose)	Hose
502-0395	Connector, Hose	Hose
502-0971	Connector, Hose	Hose
502-1530	Union, Hose (1”) − Nylon	Hose
502-1531	Connector, Hose	Hose
503-0189	Clamp, Hose	Hose
503-0249	Hose − Bulk (Order by the Foot − 3 Feet Required)	Hose
503-0569	Hose (3−1/2” ID) Bulk (Order By The Foot − 2 Feet Required)	Hose
503-0685	Clamp, Hose	Hose
503-0856	Hose, Radiator − Lower (3−1/2” ID x 5−1/2”)	Hose
503-1418	Hose − Bulk (1/4” ID) (Order By The Foot − 18 Feet Required)	Hose
503-1620	Hose – Bulk (3/8" ID) (Order by the Foot)	Hose
503-1634	Hose, Silicon Rubber	Hose
503-1634-01	Hose, Rubber (3/4” ID x 4”)	Hose
503-1728	Hose (3” ID x 5–1/2”)	Hose
503-1779	Hose − Bulk (1” ID) (Order By The Foot − 1 Foot Required)	Hose
503-1870-07	Clamp, Hose	Hose
503-1870-11	Clamp, Hose	Hose
503-1870-12	Clamp, Hose	Hose
503-1870-14	Clamp, Hose	Hose
503-1872-01	Clamp, Hose	Hose
503-1872-05	Clamp, Hose	Hose
503-1872-07	Clamp, Hose	Hose
503-2157-01	Clamp, Hose	Hose
503-2276	Elbow, Hose	Hose
503-2350-04	Hose, Coolant (1” x 5‘)	Hose
503-2350-05	Hose, Coolant (1” x 8‘)	Hose
505-0759	Adapter − Pipe to Hose (1” x 1”)	Hose
518-0548-20	Clamp, Hose	Hose
518-0548-24	Clamp, Hose	Hose
122-0702	Head, Oil Filter	Oil filter
122-0777	Filter, Lube Oil	Oil filter
098-7954	Label, Information − Element Replacement	Service part / kit
102-1335	Plug, Oil Drain	Service part / kit
130-1430	Exchanger, Heat	Service part / kit
130-1515	Tank, Water	Service part / kit
130-4582	Bracket, Mounting	Service part / kit
130-5666-02	Tube, Water Heater	Service part / kit
130-5852-02	Tube, Water Heater	Service part / kit
140-1260	Fitting, Safety Filter	Service part / kit
140-1260-01	Fitting, Safety Filter	Service part / kit
193-0128	Gauge, Fuel Pressure (0-200 Lbs)	Service part / kit
307-2621-02	Relay, Start Solenoid (K4)	Service part / kit
307-2859	Relay, Power - 24VDC (K11)	Service part / kit
323-1491	* Pin, Contact (Used With Inline G)	Service part / kit
323-1492	* Socket, Contact (Used In Stations 18, 19)	Service part / kit
323-1718	* Pin, Contact (Used In Station 17)	Service part / kit
332-2634	Clamp, Hose	Service part / kit
333-0639-01	Heater, Coolant (4990 Watt)	Service part / kit
333-0639-02	Heater, Coolant (6420 Watt)	Service part / kit
416-0446	Cable, Battery - Jumper	Service part / kit
504-0171	Valve, Shutoff	Service part / kit
505-0100	Nipple, Pipe - Close (1/2”)	Service part / kit
505-1071	Coupling, Flexible (For 2" Pipe)	Service part / kit
505-1072	Valve, Water	Service part / kit
518-0548-42	Clamp, Retainer 4 Prior To December 1996 Production (Mounted On Top And Side Of Control Box Wrapper)	Service part / kit
870-0257	Nut, Locking (5/16−18) * − Parts Used On Heat Exchanger Installations With Automatic Water Regulator # − Cut Off And Discard Swivel Connector End Of Hose So That 1/8 NPT Connector End Measures Length As Indicated Above + − Parts Used On Heat Exchanger Installations Without Automatic Water Regulator	Service part / kit
898-1254-25	Sleeving – Heater Leads (59”)	Service part / kit
EXS-1036-1	RAIN CAP	Service part / kit
M-1808-4	TYPICAL INSTALLATION	Service part / kit
M-CK4911685P	Cylinder Kit	Service part / kit
MCB4911685	Piston Kit	Service part / kit
M-1759	INJECTION PUMP	Pump
323-1445	* Seal, Cable (Used With Station 17)	Seal
508-0292	Washer, Sealing - Copper	Seal
151-0411	Pickup, Magnetic	Sensor
193-0432	Sender, Oil Temperature (S2 Engine Block, E4 Oil Pan)	Sensor
193-0444	Sender, Oil Pressure (S1)	Sensor
193-0468	Sender, Low Coolant	Sensor
193-0481	Sender Assembly - Low Coolant Level	Sensor
193-0529-01	Sender, Oil Temperature	Sensor
309-0269	Sender, Temperature-Lo Engine	Sensor
M-1760	PRE-HIGH AND HIGH COOLANT TEMPERATURE SENSOR	Sensor
960-0504	PCC Control Service Manual	Service manual
960-0507	Detector Control Service Manual	Service manual
309-0649	Thermostat (Includes Connector Socket) (S11)	Thermostat

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

Common questions

What is the oil capacity of the Cummins/Onan VTA-28-GI?

The Cummins/Onan VTA-28-GI engine has an oil capacity of 84 L (88.8 US qt).

Which generators use the Cummins/Onan VTA-28-GI engine?

The Cummins/Onan VTA-28-GI powers 2 generator set(s), including Cummins/Onan 450 DM, Cummins/Onan 500 DM.

What is a common problem with the Cummins/Onan VTA-28-GI engine?

A commonly reported issue on generators using the Cummins/Onan VTA-28-GI is: Engine will not crank. Cause: Fault lamp on. Fix: Correct fault and reset control..