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Cummins/Onan KTA50-G22 Engine

The Cummins/Onan KTA50-G22 is a 50.3 L 16-cylinder turbocharged-aftercooled engine rated at 1500 rpm, producing up to 1567 kW. It powers generator sets from Cummins/Onan, including the C1800 D5P. It holds 177 L (46.8 gal) of oil and 530 L (140.0 gal) of coolant.

Also known as: Cummins KTA50-G22

Part of the Cummins/Onan KTA50 engine family — 13 variants share parts & fitment.

50.3 L
Displacement
16
Cylinders
1500 rpm
Rated speed
1567 kW
Gross power
On this pageSpecsGenerator setsFAQFluids

Engine specifications

Oil capacity177.0 L
Coolant capacity530.0 L
Displacement50.3 L
Cylinders16
AspirationTurbocharged-Aftercooled
Rated speed1500 rpm
Gross power1567 kW

Generator sets powered by this engine

1
Cummins/Onan C1800 D5P

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

Recommended fluids

FluidGradeStandardAmbientCapacityNotes
FuelIS:1460Fuel consumption data is based on diesel having specific gravity of 0.85 and conforming to IS:1460; fuel consumption tolerance is +5%

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 KTA50 family

298
Part #DescriptionCategory
140-2096Element, Primary (Outer)air_filter
140-2097Cleaner, Air (Includes Elements)air_filter
140-2467Element, Safety (Inner)air_filter
140-2501Cleaner, Air (Disposable)air_filter
140-2502Band, Mountingair_filter
140-2503Bracket, Mountingair_filter
140-3163Cleaner, Air (No Replaceable Element)air_filter
140-3230Cleaner, Air (Includes Elements - See Ref. No. 25 and 26)air_filter
309-0272Regulator, Voltage - 24 VDC (Used on 35 A MP Alternator)alternator
503-1743-01Alternator & Orive Components Group Pulley, Alternator - Multi Groove (Use with 35 AMP Alternator)alternator
206587CAP, MAIN BEARINGbearing_cap
206588CAP, MAIN BEARINGbearing_cap
98-5347Decal - Caution Fan Drive & Lube Components Group Belt.belt
106069SCREW, HEXAGON HEAD CAPbolt
205584SCREW, TWELVE POINT CAPbolt
206028SCREW, SOCKET HEAD CAPbolt
3032633SCREW, TWELVE POINT CAPbolt
3177945SCREW, HEX FLANGE HEAD CAPbolt
3628452SCREW, HEXAGON HEAD CAPbolt
S-112SCREW, HEXAGON HEAD CAPbolt
205684BRACKET, LIFTINGbracket_lifting
205230BUSSINGbushing
0300-4623-29DFLB (600V)current_transformer
0300-4623-30DFLC (600V)current_transformer
0300-4623-52DFLB BR (0-480V)current_transformer
0300-4623-54DFLC BR (0-480V)current_transformer
3178803CYLINDER BLOCK OPTION BP6089cylinder_block
3178910CYLINDER BLOCKcylinder_block
148582DOE, PINdowel_pin
70662DOE, PINdowel_pin
3629497DRAINCOCKdraincock
206224PLUG, EXPANSIONexpansion_plug
206742PLUG, EXPANSIONexpansion_plug
3629168PLUG, EXPANSIONexpansion_plug
122-0757Filter. Water - W/Corosion Inhibiting Chemicalfilter
159-1445Reservoir, Fuelfluid
FS1216Fuel/Water Sep Spin-Onfuel_filter
121-0113Gasket, Pumpgasket
121-0117Gasket, Hand Holegasket
205059WASHER, PLAINgasket
3002993DOE, RINGgasket
3025485WASHER, PLAINgasket
3176857DOE, RINGgasket
3178450WASHER, PLAINgasket
3178457WASHER, PLAINgasket
M-4352581Upper Gasket Setgasket
S-604WASHER, LOCKgasket
S-610WASHER, LOCKgasket
338-2278Harness. Wiring - AC (Includes Terminal Block & Cable Ties) [Used only with meters]harness
338-2529Harness. Wiringharness
128-0108Insulation, Hose - Bulk (7/8º ID) (Order By The Foot - 10 Feet Required)hose
130-5588-02Tube, Water Heaterhose
130-5589-02Tube, Water Heaterhose
130-5590-02Tube, Water Heaterhose
130-5591-02Tube, Water Heaterhose
338-2925Hose, Radiatorhose
501-0704Line, Flexible Fuel - Fuel Outhose
501-0707Line, Flexible Fuel - Fuel Inhose
502-1162Connector, Hose (3/8")hose
503-0183Clamp, Hosehose
503-0685Clamp, Hosehose
503-0868Clamp, Hose - T-Bolt Type (3.5" NON)hose
503-1140Hose, Rubberhose
503-1484Elbow, Hose (45 Deg) (7" ID)hose
503-1620Hose – Bulk (3/8" ID) (Order by the Foot)hose
503-1727Hose, Radiator (3” ID x 10”)hose
503-1728Hose (3” ID x 5–1/2”)hose
503-1870-11Clamp, Hosehose
503-1870-12Clamp, Hosehose
505-0324Hose. Bulk (Sold by the Foot) Two Feet Required Nipple, Pipe - Half (3/4 NPT x 2"LG)hose
98-5759Drive - Multi Groove Hose, Flexible - Lube (Grease)hose
98-5842Clamp, Hose - T-Bolt Type (3.5" NON)hose
3822575Injector and valve adjustment kitinjector
3011884INSERT, LINERinsert_liner
3019150INSERT, LINERinsert_liner
3021148INSERT, LINERinsert_liner
206580BEARING, MAINmain_bearing
206581BEARING, MAIN A/R No.2,3,4,5,6,7,&8, Uppermain_bearing
206582BEARING, MAIN A/R No.2,3,4,5,6,7,&8, Uppermain_bearing
206583BEARING, MAIN A/R No.2,3,4,5,6,7,&8, Uppermain_bearing
206584BEARING, MAIN A/R No.2,3,4,5,6,7,&8, Uppermain_bearing
206590BEARING, MAINmain_bearing
206591BEARING, MAIN A/R No.2,3,4,5,6,7,&8, Lowermain_bearing
206592BEARING, MAIN A/R No.2,3,4,5,6,7,&8, Lowermain_bearing
206593BEARING, MAIN A/R No.2,3,4,5,6,7,&8, Lowermain_bearing
206594BEARING, MAIN A/R No.2,3,4,5,6,7,&8, Lowermain_bearing
206600BEARING, MAINmain_bearing
206601BEARING, MAIN A/R No.1&9, Uppermain_bearing
206602BEARING, MAIN A/R No.1&9, Uppermain_bearing
206603BEARING, MAIN A/R No.1&9, Uppermain_bearing
206604BEARING, MAIN A/R No.1&9, Uppermain_bearing
206610BEARING, MAINmain_bearing
206611BEARING, MAIN A/R No.1&9, Lowermain_bearing
206612BEARING, MAIN A/R No.1&9, Lowermain_bearing
206613BEARING, MAIN A/R No.1&9, Lowermain_bearing
206614BEARING, MAIN A/R No.1&9, Lowermain_bearing
3018210SET, MAIN BEARING STANDARDmain_bearing_set
3018211SET, MAIN BEARING A/R .010 Inch O/Smain_bearing_set
3018212SET, MAIN BEARING A/R .020 Inch O/Smain_bearing_set
3018213SET, MAIN BEARING A/R .030 Inch O/Smain_bearing_set
309-0561Alternator & Drive Components Group Pulley. Alternator - Multi Groove (Use with 35 A MP Alternator)oil_filter
LF3325Lube, Full-Flow Spin-Onoil_filter
016-40820Harness, Wiring (Includes Cable Ties and Terminals)other_service
102-1335Plug, Oil Drainother_service
121-0116Cover, Hydraulic Holeother_service
130-2981Cap. Radiator - 7#PSIother_service
130-3538Chemical DCA4 Service Pre-Charging Complete Systemother_service
130-3576Decal - Groundother_service
130-3758Radiator (includes Cap)other_service
140-1260Fitting, Safety Filterother_service
140-1548Indicator, Serviceother_service
140-2098Hood, Air Inlet (Includes Mounting Clamp)other_service
140-2099Bandother_service
140-2395Tube, Air Inletother_service
140-2504-01Bracket - Right Sideother_service
140-2504-02Bracket - Left Sideother_service
140-2508Tube, Air Inletother_service
140-2509Tube, Air Inletother_service
140-2515Bracket, Mountingother_service
140-2519Tube, Air Inletother_service
140-2521Tube, Air Inletother_service
140-2528Shieldother_service
191-1926-02other_service
300-2856Board Assy, Printed Circuitother_service
300-2863Board Assy, Printed Circuit - Relay Assembly- (A14)other_service
3007525Liner Kit STDother_service
301-9054-01Decal - Panel Front Markings (Control With Meters)other_service
301-9054-02Clip - Fastenerother_service
301-9054-03Clip - Fastenerother_service
3012611Liner Kit +.010" UPFother_service
3012612Liner Kit +.020" UPFother_service
302-1720Meter, Frequency (M23)other_service
302-1753Ammeter (M22) See Current Transformer & Ammeter Installation Figure for Parts)other_service
302-1800Ammeter (M22) Scale in Amps as Indicated 0-2000/0-4000 (600 VAC Application) 0-3000/0-6000 (120-480 VAC Application)other_service
302-1908Screw. Cap - Hex Head (M8-1.25 x 35MM)other_service
305-0818-02EOOO-21002other_service
307-1056Relay. 24 VDCother_service
307-1987Clip. Relayother_service
308-0882Decal - Panel Front Markings (Control Without Meters)other_service
309-0436Switch, Thermostatic - High Water Temperature (PRE-ALARM)(216"F) Switch. Thermostatic - High Water Temperature (SHUTDOWN)other_service
309-0437(222"F)other_service
309-0635-02Valve, Checkother_service
3096680Piston STC 13.8:1 Ratioother_service
3096681Piston KT Series 15.5:1 Ratioother_service
3096682Piston KTA Series 14.5:1 Ratioother_service
3096683Piston 13.5:1 Ratioother_service
3096684Piston KTA 15.7:1 Ratioother_service
3096685Piston STC 13.9:1 Ratioother_service
319-0447Bracket. Mounting - Relayother_service
319-0754Tie. Cableother_service
322-0363Component 322-0363other_service
323-0804Screw. Machine - Round Head with IT Lock Washer (#6-32 x 1/2")other_service
323-1200# Socket, Contact (Used in J1, J2)other_service
323-1304tiotming, Umectorother_service
323-1306Genset component (SJB series)other_service
3318201Battery Cable Groupother_service
332-0052Clamp, Loopother_service
332-0607Block, Terminal (T81)other_service
332-1279Terminal. Lug - Ring (3/8other_service
332-1292Terminal Board (Includes Parts Marked #)other_service
332-1445Tie. Cableother_service
332-1673Terminal, Wire - Spadeother_service
332-2634Clamp, Retainer 4 Prior To December 1996 Production (Mounted On Top And Side Of Control Box Wrapper)other_service
332-2723Strip. Markerother_service
333-0677-01Heater, Coolant - 4990 Wattother_service
333-0677-02Heater, Coolant - 6420 Wattother_service
338-1835Harness, Wiring (A13 to A l l )other_service
338-1836Harness, Wiring (A14 to A l l )other_service
338-1904Harness. Wiring (A15 to All)other_service
338-2532Terminal. Lug - Forked (No. 6 Screw)other_service
355-0093Voltmeter (M21) Dual Scale 0-300/0-600V Single Scale 0-750Vother_service
3628731Piston STC Kitother_service
3630913Piston KTA-50-G7other_service
3631241Piston Kit STC 13.9:1 Ratioother_service
3631242Piston Kit 13.5:1 Ratioother_service
3631243Piston Kit KTA 15.7:1 Ratioother_service
3631244Piston Kit KTA Series 14.5:1 Ratioother_service
3631245Piston Kit KT Series 15.5:1 Ratioother_service
3631246Piston Kit STC 13.8:1 Ratioother_service
3801268Liner Kit +.030" UPFother_service
3803530Piston Assembly STCother_service
3804747Piston Kit KTA-50-G7other_service
3804885Piston KTA-50-G8/G9other_service
406-0333Component 406-0333other_service
406-0334Clip, Retaining - Turnbutton Fastenerother_service
4089847Piston Kit GTA38/19other_service
4090013Piston Kit KTA-38-M2other_service
4090029Piston Kit QSK19CEother_service
4090181Piston GTA38/19other_service
4097889Piston KTA-38-M2other_service
4910463Piston QSK19R/Mother_service
4910465Piston QSK Seriesother_service
4916177Piston GTA/GQSK19other_service
4918058Piston QSK19CEother_service
4922319Piston QSK19Cother_service
4955233Piston Kit QSK19R/Mother_service
4955235Piston Kit QSK Seriesother_service
4955236Piston Kit QSK19Cother_service
4955238Piston Kit GTA/GQSK19other_service
501-0520Screw, Cap - Hex Head (3/8-24 x 5/8")other_service
501-0524Washer, Lock - EIT (3/8")other_service
501-0558Line. Flexible - Bypassother_service
503-1717Elbow, Reducer (45 Deg) (7" ID to 6" ID)other_service
503-1720Insert, Reducer (6" OD to 5-1/2" ID)other_service
503-1730other_service
504-0028Valve, Radiator Drainother_service
505-0007Belt. Drive - Multi Groove (Used with 35 A MP Alternator * Pulley, Alternator - Multi Groove (Use with 75 A MP Alternator)other_service
505-0017Bushing, Pipe – Reducer (3/8" to 1/4")other_service
505-0021Bushing, Pipe - Reducer (3/4º to 1/2º)other_service
505-0100Nipple, Pipe - Close (1/2”)other_service
505-0102Filter. Water - W/Corosion Inhibitingother_service
505-0117Bushing, Reducer - Flush, Brass (1/2' NPT x3/8° NPT)other_service
505-0132Nipple, Pipe - Close (3/4 NPT x l-3/8"LG) Elbow. Pipe - 90* (3/4 NPT)other_service
505-0376Elbow – 45 Deg (3/8")other_service
508-0015Washer, Insulating - Fiber (#8)other_service
511-0161-02.*other_service
517-0131Capacitor (Used across Voltmeter Terminals on some Sets)other_service
518-0548-24Clamp, Retainer Begin December 1996 Production (Mounted On Top And Side Of Control Box Wrapper On The Side Towards The Control Box Cover)other_service
518-0548-42Clamp, Retainer 4 Prior To December 1996 Production (Mounted On Top And Side Of Control Box Wrapper)other_service
526-0030Washer, Flat (3/8")other_service
800-0055Screw, Cap – Hex Head (3/8–16 x 2-1/4")other_service
800-0062Nut, Insulatedother_service
800-0094Screw, Cap – Hex Head (1/2–13 x 2")other_service
800-0270DCA4 Service Pre-Charging Complete Systemother_service
800-2060Screw, Cap - Hex Head (M8x 1.25 x35)other_service
809-0035Screw, Machine - Thread Cutting, Round Head (#8 X 3/4')other_service
812-0063Screw, Machine - Round Headother_service
812-0065Screw, Machine - Round Head (#6 - 32 x 5/8')other_service
812-0084Screw, Machine - Round Head (#8-32 x 1)other_service
815-0388Bracket. Mounting - Relay Lead(s), Electrical Wire, Electrical - 20 AW G, Insulated Terminal, Wire - Forked, 18-20 Gaugeother_service
815-0544Screw, Machine - Round Head IT Washer (#6 - 32 x 1/2')other_service
821-0004Screw, Self-Locking - Hexother_service
821-0029Screw, Self–Locking – Hex Washer Head (3/8–16 x 3/4")other_service
821-0033Screw, Self–Locking – Hex Washer Head (7/16–14 x 3/4")other_service
821-5004-03Screw, Self-Locking – Hex Washer Head (3/8–16 x 1")other_service
850-0050Washer, Lock - Spring (3/8”)other_service
853-0003Washer, Lock - ET (#6)other_service
856-0008Washer, Lock - EIT (5/16'1)other_service
856-0010Washer, Lock - EIT (3/8')other_service
870-0131Nut. Hex - with ET (#10-32)other_service
870-0196Nut, Insulating (#8)other_service
870-0281Nut, Self-Locking – Hex Washer Head (3/8–16)other_service
900-0181PCC Control Service Manualother_service
960-0602other_service
960-0606other_service
960-0608other_service
98-2235other_service
98-4732Cautionother_service
98-4798Decal - Caution "7# PSI HOT WATER SYSTEM"other_service
98-5298Decal - Panel Rear Markings (All Control Panels)other_service
98-5299Decal - Panel Rear Markings (All Control Panels)other_service
98-5316Decal - Panel Rear Markings (All Control Panels)other_service
98-5387Nut, Self-Locking - with ET Lockwasher (#10-32)other_service
98-5393Screw, Tapping - Round Head (#8 x 3/4")other_service
98-5822Bushing, Reducer - Flush (1/2 NPT x 3/8 NPT)other_service
98-6108-03Decal - Model Identificationother_service
98-6111-03ONAN GEN SET CUMMINS GEN SETother_service
98-6139-03CUNMINS ONAN GEN SETother_service
98-6169Terminal Assembly (Includes Replaceable Items 26 thru 29)other_service
F-2375A single line drawing of the prime power systemother_service
M-3804747Piston Kitother_service
68445PIN, GROOVEpin
3628605PLUG, PIPEpipe_plug
3628607PLUG, PIPEpipe_plug
3178464PLATE, COVERplate_cover
121-0111Drive, Pumppump
159-1451Pump, Fuel Transferpump
3011076SEAL, D RINGseal
3014668SEAL, D RINGseal
3081489SEAL, OILseal
3177556SEAL, RECTANGULAR RINGseal
509-0283-01Sealseal
509-0336Seal, O-Ringseal
509-0337Seal, O-Ringseal
149-2232Indicator, Air Restriction (Includes Fitting)sensor
193-0244Sender, Pressure - 0i1sensor
193-0375# Sender, Water Temperaturesensor
309-0269Switch, Low Engine Temperature (S4)sensor
960-0181service_manual
960-0302service_manual
960-0504PCC Control Service Manualservice_manual
960-0507Detector Control Service Manualservice_manual
3033853SHAFT, IDLERshaft_idler
3175281SHAFT, IDLERshaft_idler
205741SHIM, A/R .007 Inch O/Sshim
205742SHIM, A/R .008 Inch O/Sshim
205743SHIM, A/R .009 Inch O/Sshim
205744SHIM, A/R .020 Inch O/Sshim
205745SHIM, A/R .031 Inch O/Sshim
3000138SUPPORT, BEARINGsupport_bearing
309-0649Thermostatthermostat
3000139BEARING, THRUSTthrust_bearing
3001708BEARING, THRUST A/R .010 Inch O/Sthrust_bearing
3001709BEARING, THRUST A/R .020 Inch O/Sthrust_bearing
3001710BEARING, THRUST A/R .030 Inch O/Sthrust_bearing
3001711BEARING, THRUST A/R .040 Inch O/Sthrust_bearing
3179664VALVE, PISTON COOLINGvalve_piston_cooling
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 KTA50-G22?

The Cummins/Onan KTA50-G22 engine has an oil capacity of 177.0 liters.

What is the displacement of the Cummins/Onan KTA50-G22?

The Cummins/Onan KTA50-G22 has a displacement of 50.3 liters with 16 cylinders.

Which generators use the Cummins/Onan KTA50-G22 engine?

The Cummins/Onan KTA50-G22 powers 1 generator set(s), including Cummins/Onan C1800 D5P.