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Home›Engines›Cummins/Onan VTA28

Cummins/Onan VTA28 Engine Engine

The Cummins/Onan VTA28 is a 28 L turbo charged and after-cooled engine. It powers generator sets from AKSA and Cummins/Onan, including the AC710, DFGB and DFGE. It holds 84 L (22.2 gal) of oil.

Also known as: CUMMINS VTA28

Part of the Cummins/Onan VTA28 engine family — 5 variants share parts & fitment.

28.0 L
Displacement
84.0 L
Oil capacity

Engine specifications

Oil capacity84.0 L
Displacement28.0 L
Aspirationturbo Charged and after-cooled

Generator sets powered by this engine

4

Shared across brands: AKSA, Cummins/Onan

AKSA AC710Cummins/Onan DFGBCummins/Onan DFGECummins/Onan VTA28

Common problems

15
  • Over Current 1471
  • Low Coolant Level 197
  • Weak Battery 1442
  • Under Frequency 1448
  • Too Long in Idle 2342
  • The generator set produces low voltage output. 402
    Cause: Possible causes include: dirty or clogged air filter, malfunctioning alternator, or a faulty voltage regulator.
    Fix: Clean the air filter and check for any blockages. Inspect the alternator for signs of damage or wear. Test the voltage regulator to ensure it is functioning correctly.
  • The generator set produces high temperature warnings. 403
    Cause: Possible causes include: insufficient coolant, malfunctioning thermostat, or a clogged radiator.
    Fix: Check the coolant level and top up if necessary. Inspect the thermostat for any signs of failure. Clean the radiator to ensure proper airflow.
  • The generator set produces excessive noise during operation.
    Cause: Possible causes include: loose or damaged engine components, worn-out bearings, or a malfunctioning muffler.
    Fix: Inspect the engine for any loose parts and tighten as necessary. Check the bearings for wear and replace if needed. Test the muffler to ensure it is functioning properly.
  • The generator set does not start. 401
    Cause: Possible causes include: low fuel level, faulty starter motor, or a malfunctioning ignition system.
    Fix: Check the fuel level and refill if necessary. Test the starter motor for functionality. Inspect the ignition system for any issues.
  • Status Indicators are not functioning properly.
    Fix: Check the status indicators for any visible damage or loose connections. If the issue persists, refer to the troubleshooting table.
  • Speed/Hz Match 1469
  • Speed Signal Lost 121
  • Shutdown After Battle Short will be displayed for this type of shutdown. 1123
    Fix: Battle Short is suspended and a shutdown occurs immediately if any of the following critical shutdown faults occur: Overspeed − Fault code 234, Emergency Stop − Fault code 1433, Remote Emergency Stop − Fault code 1434, Speed Signal Lost − Fault code 121, Excitation Fault − Fault code 2335. Moving the customer installed Battle Short switch to OFF with an active but overridden shutdown fault or a shutdown fault that was overridden at any time.
  • Short Circuit 1445
  • Remote Emergency Stop 1434

Compiled from service & troubleshooting documentation across every generator set that uses the Cummins/Onan VTA28.

Maintenance schedule

ItemSpecCapacityPart #Interval
Air filter— find
Fuel filter— find
Oil filter— find
Belt— find
Coolant filter— find
Oil—

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

Parts cataloged across the Cummins/Onan VTA28 family

132
Part #DescriptionCategory
140-1545Cap, Air Cleanerair_filter
140-1647Element, Primary - Air Cleaner [AF891M]air_filter
140-1649Element, Secondary - Air Cleaner [AF890]air_filter
140-1650Element, Air Cleaner [AF928M]air_filter
140-2301Cleaner, Air (Includes Replacement Elements) 140−2465air_filter
140-3288-02Cleaner, Airair_filter
140-3349-02Bracket, Air Cleanerair_filter
309-0269Air Cleaner (Includes Element) - Standardair_filter
191-1846-01Alternator (35 Amp, 24 VDC)alternator
130-3839-01Guard, Belt − Right Sidebelt
130-3839-02Guard, Belt − Left Sidebelt
130-3840Guard, Belt − Topbelt
130-3841Guard, Belt − Bottombelt
130-3842Guard, Belt − Frontbelt
130-3843Guard, Belt − Right Sidebelt
130-3844Guard, Belt − Bottom Backbelt
130-3845Guard, Belt − Top Backbelt
130-3846Guard, Belt − Left Sidebelt
511-0105Belt−Vbelt
511-0163Belt, Drivebelt
511-0165Belt, Drive (Fan)belt
EXS-1583-3CONTROL HEATERcontrol_heater
309-0570Filter, Water - W/Corrosion Inhibiting Chemical DCA4coolant_filter
CS-1075-1COOLANT FILTERScoolant_filter
CS-1367-2TYPICAL COOLANT HEATERcoolant_heater
130-4552Cover, Coolant Heaterfluid
333-0407-05Heater, Oil (300 Watt, 480 Volt)fluid
502-1337Adapter, Coolant Heaterfluid
309-0565-01Filter, Fuel [FF202]fuel_filter
FF202Fuel, Spin-Onfuel_filter
FS1216Fuel/Water Sep Spin-Onfuel_filter
130-1193Gasket, Outlet Adaptergasket
130-4354Radiator (Includes Cap, Sight Gauge And Overflow Hose) (Also Includes Cover Plates, Gaskets, Screws And Lock Washers For All Water Outlets)gasket
330-0141-04Gasket, Covergasket
330-0142Box, Terminal (Includes Cover and Gasket − Ref No. 19 and 20)gasket
128-0108Insulation, Hose – Bulk (Order By The Foot – 12 Feet Required)hose
130-3874Base, 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 Abovehose
130-3875Tube, Outlethose
130-4576Tubehose
130-4577Tubehose
130-4581Tubehose
416-0680Cable, Battery (10")hose
501-0537-22Hose, Oil (86”)hose
501-0537-23Hose, Oil (22”)hose
501-0744-01Hose, Coolanthose
501-0744-05Hose, Coolanthose
502-0313Elbow, Hose − 90° (1/8” Pipe to 1/4” Hose)hose
502-0395Connector, Hosehose
502-0971Connector, Hosehose
502-1043-01Tube, Water - Heaterhose
502-1046Coupling, Hose - Elbowhose
502-1530Union, Hose (1”) − Nylonhose
502-1531Connector, Hosehose
503-0189Clamp, Hosehose
503-0249Hose − Bulk (Order by the Foot − 3 Feet Required)hose
503-0569Hose (3−1/2” ID) Bulk (Order By The Foot − 2 Feet Required)hose
503-0685Clamp, Hosehose
503-0856Hose, Radiator − Lower (3−1/2” ID x 5−1/2”)hose
503-1418Hose − Bulk (1/4” ID) (Order By The Foot − 18 Feet Required)hose
503-1602Hose, Rubberhose
503-1620Hose – Bulk (3/8" ID) (Order by the Foot)hose
503-1634Hose, Silicon Rubberhose
503-1634-01Hose, Rubber (3/4” ID x 4”)hose
503-1728Hose (3” ID x 5–1/2”)hose
503-1779Hose − Bulk (1” ID) (Order By The Foot − 1 Foot Required)hose
503-1870-07Clamp, Hosehose
503-1870-11Clamp, Hosehose
503-1870-12Clamp, Hosehose
503-1870-14Clamp, Hosehose
503-1872-01Clamp, Hosehose
503-1872-05Clamp, Hosehose
503-1872-07Clamp, Hosehose
503-2157-01Clamp, Hosehose
503-2276Elbow, Hosehose
503-2350-04Hose, Coolant (1” x 5‘)hose
503-2350-05Hose, Coolant (1” x 8‘)hose
505-0759Adapter − Pipe to Hose (1” x 1”)hose
518-0548-20Clamp, Hosehose
870-0257Nut, 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 Regulatorhose
122-0702Head, Oil Filteroil_filter
122-0777Filter, Lube Oiloil_filter
302-1854Filter, Oil - Bypass [LF777]oil_filter
309-0579-03Filter, Oil [LF670]oil_filter
098-7954Label, Information − Element Replacementother_service
102-1335Plug, Oil Drainother_service
130-0523Cooling System - Radiatorother_service
130-1430Exchanger, Heatother_service
130-1515Tank, Waterother_service
130-3317-01Pulley, Driveother_service
130-3320-04Cap, Radiator 10 PSIother_service
130-3320-05Cap, Radiatorother_service
130-3339Heater, Electrical - Engine Coolant (4000 Watt, 208 VAC)other_service
130-3340Heater, Electrical - Engine Coolant (4000 Watt, 240 VAC)other_service
130-4582Bracket, Mountingother_service
130-5666-02Tube, Water Heaterother_service
130-5852-02Tube, Water Heaterother_service
140-1260Fitting, Safety Filterother_service
140-1260-01Fitting, Safety Filterother_service
193-0128. Gauge, Pressure (Includesother_service
307-2859Relay, Power - 24VDC (K11)other_service
323-1491* Pin, Contact (Used With Inline G)other_service
323-1492* Socket, Contact (Used In Stations 18, 19)other_service
323-1718* Pin, Contact (Used In Station 17)other_service
332-2634Clamp, Retainer 4 Prior To December 1996 Production (Mounted On Top And Side Of Control Box Wrapper)other_service
333-0639-01Heater, Coolant (4990 Watt)other_service
333-0639-02Heater, Coolant (6420 Watt)other_service
338-2334Harness, Wiring - Engineother_service
416-0446Cable, Battery (#2/0) 12-1/2" (Jumper)other_service
503-1603Elbow, Pipe - Male, 90 DEGother_service
504-0171Valve, Shutoffother_service
505-0100Nipple, Pipe - Close (1/2”)other_service
505-1071Coupling, Flexible (For 2" Pipe)other_service
505-1072Valve, Waterother_service
898-1254-25Sleeving – Heater Leads (59”)other_service
EXS-1036-1RAIN CAPother_service
M-1808-4TYPICAL INSTALLATIONother_service
307-2621-02Relay, Start Solenoid (K4)relay
323-1445* Seal, Cable (Used With Station 17)seal
140-2226Part - Reference 1sensor
151-0411Pickup, Magneticsensor
193-0432Sender, Oil Temperature (S2 Engine Block, E4 Oil Pan)sensor
193-0444Sender, Oil Pressure (S1)sensor
193-0468Sender, Low Coolant Level (S7)sensor
193-0481Sender Assembly - Low Coolant Levelsensor
193-0529-01Sender, Oil Temperaturesensor
302-1853Transducer (Sender), Pressure - Oilsensor
302-1855Transducer (Sender), Temperature - Engine Coolantsensor
302-1857-01Switch, Temperature - Engine Coolantsensor
309-0566Switch, Low Coolant Levelsensor
191-1588Starter, 24 VDCstarter
309-0649Thermostatthermostat
508-0292Washer, Sealing - Copperwasher

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 VTA28?

The Cummins/Onan VTA28 engine has an oil capacity of 84.0 liters.

What is the displacement of the Cummins/Onan VTA28?

The Cummins/Onan VTA28 has a displacement of 28.0 liters.

Which generators use the Cummins/Onan VTA28 engine?

The Cummins/Onan VTA28 powers 4 generator set(s), including AKSA AC710, Cummins/Onan DFGB, Cummins/Onan DFGE, Cummins/Onan VTA28.

What is a common problem with the Cummins/Onan VTA28 engine?

A commonly reported issue on generators using the Cummins/Onan VTA28 is: Over Current.