The Cummins/Onan 6CTA8.3 engine line groups 9 variant designations. Parts and fitment are pooled here so a cross-reference found on one variant surfaces for the whole family.
| Part # | Description | Category |
|---|---|---|
| 140-2241 | Element, Air Cleaner | Air filter |
| 140-2251 | Element, Air Cleaner Secondary (Inner) | Air filter |
| 140-2252 | Element, Air Cleaner - Secondary (Inner) | Air filter |
| 3833680 | Bracket, Air Cleaner | Air filter |
| 3837348 | Cleaner, Air | Air filter |
| 3919520 | Bracket, Air Cleaner | Air filter |
| AC9055-01 | Air Cleaner | Air filter |
| AF4669 | Air Cleaner | Air filter |
| 3016627 | Alternator | Alternator |
| 3016628 | Alternator | Alternator |
| 309-0561 | Alternator & Drive Components Group Pulley. Alternator - Multi Groove (Use with 35 A MP Alternator) | Alternator |
| 130-3216 | V-belt | Belt |
| 3897933 | Bracket, Belt Guard | Belt |
| 3897934 | Bracket, Belt Guard | Belt |
| 3897937 | Bracket, Belt Guard | Belt |
| 3911562 | Belt | Belt |
| 3921633 | Guard, Belt | Belt |
| 3922900 | Tensioner, Belt | Belt |
| 3925697 | Bracket, Belt Tensioner | Belt |
| 405-5832 | Door, Housing | Door |
| 3377363 | Lube Oil, Cummins Premium Blue 15W40 (one-gallon jugs) | Fluid |
| 3843760 | Fuel Filter (Fleetguard FS1251 equivalent) | Fuel filter |
| 102-1356 | Gasket, Oil Drain | Gasket |
| 3519762 | Gasket, Turbocharger | Gasket |
| 3914303 | Gasket, Gear Housing (Front-Gear-Cover group BP9733-04) | Gasket |
| 3914311 | Gasket, Int Manifold Cover | Gasket |
| 3916300 | Gasket, Turbocharger | Gasket |
| 3917779 | Gasket, Gear Cover (Front-Gear-Cover group BP9733-04) | Gasket |
| 3918779 | Gasket, Connection | Gasket |
| 3921691 | Gasket, Exh Out Connection | Gasket |
| 3931350 | Gasket, Oil Drain | Gasket |
| 3931608 | Gasket, Acc Drive Cover | Gasket |
| 406-0831 | Hinge, Door | Hinge |
| 106334 | Hose, Plain | Hose |
| 210753 | Clamp, Hose | Hose |
| 3025152 | Hose, Plain | Hose |
| 3283227 | Coupling, Plain Hose | Hose |
| 3905084 | Hose, Flexible | Hose |
| 3907167 | Coupling, Plain Hose | Hose |
| 3911875 | Hose, Flexible | Hose |
| 3911880 | Coupling, Elbow Hose | Hose |
| 3912183 | Hose, Plain | Hose |
| 3913724 | Hose, Plain | Hose |
| 3913751 | Hose, Plain | Hose |
| 3916529 | Hose, Plain | Hose |
| 3918163 | Clamp, Hose | Hose |
| 3918521 | Clamp, Hose | Hose |
| 3918607 | Hose, Elbow | Hose |
| 3918611 | Hose, Plain | Hose |
| 3920762 | Hose, Elbow | Hose |
| 3925025 | Hose, Molded | Hose |
| 3931970 | Hose, Plain | Hose |
| 501-0441 | Line, Fuel - Flex (Fuel In) | Hose |
| 503-0197 | Clip, Hose | Hose |
| 503-0365 | Clamp, Hose | Hose |
| 503-0446 | Clamp, Hose | Hose |
| 503-0465 | Clamp, Hose | Hose |
| 503-0685 | Clamp, Hose | Hose |
| 503-1595 | Hose | Hose |
| 503-1599 | Hose, Radiator | Hose |
| 155-3150-04 | Muffler, Critical | Muffler |
| 502-0047 | Nipple, Pipe (1/4) | Nipple |
| 3318853 | Combination Full-Flow/Bypass Lubricating Oil Filter | Oil filter |
| 102-1237 | Adapter, Drain-Oil | Service part / kit |
| 102483 | End, Control Rod | Service part / kit |
| 108722 | Clip | Service part / kit |
| 127007 | Screw, Pan Head Cap | Service part / kit |
| 130-3212 | Advanced Efficiency Hydraulic/Transmission Filter | Service part / kit |
| 140-1260 | Fitting, Safety Filter | Service part / kit |
| 140-1548 | Indicator, Service | Service part / kit |
| 140-2240 | Cleaner, Air (Incl Element) | Service part / kit |
| 140332 | Clamp, T Bolt | Service part / kit |
| 146159 | Washer, Plain | Service part / kit |
| 146160 | Washer, Plain | Service part / kit |
| 155-2307 | Silencer | Service part / kit |
| 180371 | Clip | Service part / kit |
| 203555 | Connection, Exhaust Outlet | Service part / kit |
| 204991 | Washer, Plain | Service part / kit |
| 213365 | Screw, Hexagon Head Cap | Service part / kit |
| 3007636 | Plug, Expansion | Service part / kit |
| 3008468 | Plug, Pipe 1/2 NPT | Service part / kit |
| 3010596 | Screw, Captive Washer Cap | Service part / kit |
| 3018006 | Screw, Hexagon Head Cap | Service part / kit |
| 3026910 | Cable | Service part / kit |
| 3028870 | Connection, Tur Oil Inlet | Service part / kit |
| 3030871 | Gauge, Pressure | Service part / kit |
| 3030872 | Gauge, Temperature | Service part / kit |
| 3031348 | Flange, Power Takeoff | Service part / kit |
| 3031643 | Rectifier | Service part / kit |
| 3032105 | Bearing, Ball | Service part / kit |
| 3033379 | Control, Vernier | Service part / kit |
| 3033800 | Washer, Plain | Service part / kit |
| 3035083 | Isolator, Vibration | Service part / kit |
| 3035084 | Isolator, Vibration | Service part / kit |
| 3039554 | Switch, Push Button | Service part / kit |
| 3039570 | Ammeter | Service part / kit |
| 3049554 | Hourmeter & Tachometer | Service part / kit |
| 3050323 | Speed Switch, Electronic | Service part / kit |
| 309-0553 | Switch, Temperature-Pre Water | Service part / kit |
| 309-0554 | SWITCH WATER | Service part / kit |
| 3175239 | Nut, Lock | Service part / kit |
| 3284244 | Connector, Female | Service part / kit |
| 332-1473 | Lug, Solderless | Service part / kit |
| 3393823 | Bolt, Carriage | Service part / kit |
| 3885910 | Red Paint, Spray can | Service part / kit |
| 3900629 | Screw, Hex Flange Head Cap | Service part / kit |
| 3900630 | Screw, Hex Flange Head Cap | Service part / kit |
| 3900631 | Screw, Hex Flange Head Cap | Service part / kit |
| 3900632 | Screw, Hex Flange Head Cap | Service part / kit |
| 3900633 | Screw, Hex Flange Head Cap | Service part / kit |
| 3901249 | Screw, Hex Flange Head Cap | Service part / kit |
| 3901757 | Screw, Hex Flange Head Cap | Service part / kit |
| 3902115 | Screw, Hex Flange Head Cap M12 x 1.75 x 65 | Service part / kit |
| 3902468 | Cap, Filler | Service part / kit |
| 3902662 | Nut, Hexagon Flange | Service part / kit |
| 3903463 | Cover, Access Hole | Service part / kit |
| 3903990 | Screw, Hex Flange Head Cap | Service part / kit |
| 3904971 | Connection Water Transfer | Service part / kit |
| 3905156 | Shim A/R 1.00 mm Thick | Service part / kit |
| 3905157 | Shim A/R 1.04 mm Thick | Service part / kit |
| 3905158 | Shim A/R 1.08 mm Thick | Service part / kit |
| 3905159 | Shim A/R 1.10 mm Thick | Service part / kit |
| 3905160 | Shim A/R 1.14 mm Thick | Service part / kit |
| 3905161 | Shim A/R 1.18 mm Thick | Service part / kit |
| 3905162 | Shim A/R 1.20 mm Thick | Service part / kit |
| 3905163 | Shim A/R 1.24 mm Thick | Service part / kit |
| 3905164 | Shim A/R 1.28 mm Thick | Service part / kit |
| 3905165 | Shim A/R 1.30 mm Thick | Service part / kit |
| 3905166 | Shim A/R 1.34 mm Thick | Service part / kit |
| 3905167 | Shim A/R 1.38 mm Thick | Service part / kit |
| 3905168 | Shim A/R 1.40 mm Thick | Service part / kit |
| 3905169 | Shim A/R 1.44 mm Thick | Service part / kit |
| 3905170 | Shim A/R 1.48 mm Thick | Service part / kit |
| 3905171 | Shim A/R 1.50 mm Thick | Service part / kit |
| 3905172 | Shim A/R 1.54 mm Thick | Service part / kit |
| 3905173 | Shim A/R 1.58 mm Thick | Service part / kit |
| 3905174 | Shim A/R 1.60 mm Thick | Service part / kit |
| 3905175 | Shim A/R 1.64 mm Thick | Service part / kit |
| 3905176 | Shim A/R 1.68 mm Thick | Service part / kit |
| 3905177 | Shim A/R 1.70 mm Thick | Service part / kit |
| 3905178 | Shim A/R 1.74 mm Thick | Service part / kit |
| 3905180 | Shim A/R 1.78 mm Thick | Service part / kit |
| 3905181 | Shim A/R 1.80 mm Thick | Service part / kit |
| 3905182 | Shim A/R 1.84 mm Thick | Service part / kit |
| 3905183 | Shim A/R 1.88 mm Thick | Service part / kit |
| 3905184 | Shim A/R 1.90 mm Thick | Service part / kit |
| 3905185 | Shim A/R 1.94 mm Thick | Service part / kit |
| 3905186 | Shim A/R 1.98 mm Thick | Service part / kit |
| 3906436 | Tube, Water Inlet | Service part / kit |
| 3906439 | Plate, Clamping | Service part / kit |
| 3906619 | Plug, Pipe | Service part / kit |
| 3906715 | Screw, Hex Flange Head Cap | Service part / kit |
| 3906733 | Screw, Hex Flange Head Cap | Service part / kit |
| 3907978 | Stud M10 x 1.50(Both Ends) x 50 | Service part / kit |
| 3908402 | Tube, Water Outlet | Service part / kit |
| 3910901 | Screw, Hex Flange Head Cap | Service part / kit |
| 3911670 | Manifold, Exhaust | Service part / kit |
| 3912151 | Plate, Clamping | Service part / kit |
| 3912159 | Connection, Water Outlet | Service part / kit |
| 3914502 | Aftercooler | Service part / kit |
| 3914868 | Plate, Cover | Service part / kit |
| 3915772 | Seal, Rectangular Ring (Front-Gear-Cover group BP9733-04) | Service part / kit |
| 3916326 | Connection, Exhaust Outlet | Service part / kit |
| 3916518 | Screw, Hex Flange Head Cap M10 x 1.50 x 125 | Service part / kit |
| 3916585 | Screw, Hexagon Head Cap | Service part / kit |
| 3917394 | Connection, Water Transfer | Service part / kit |
| 3918109 | Screw, Hex Flange Head Cap M8 x 1.25 x 25 | Service part / kit |
| 3918192 | Washer, Sealing | Service part / kit |
| 3918498 | Screw, Hex Flange Head Cap M10 x 1.50 x 145 | Service part / kit |
| 3918500 | Tube, Air | Service part / kit |
| 3918542 | Spacer, Mounting | Service part / kit |
| 3918927 | Connection Water Transfer | Service part / kit |
| 3919461 | Block, Terminal | Service part / kit |
| 3919462 | Harness, Wiring | Service part / kit |
| 3919465 | Cabinet, Instrument | Service part / kit |
| 3919467 | Decal | Service part / kit |
| 3919563 | Tube, Water Transfer | Service part / kit |
| 3919577 | Heater, Engine | Service part / kit |
| 3919578 | Panel, Instrument | Service part / kit |
| 3919585 | Panel, Eng Instrumentation | Service part / kit |
| 3919687 | Connector, Female | Service part / kit |
| 3919748 | Dataplate | Service part / kit |
| 3919750 | Brace, Exh Out Connection | Service part / kit |
| 3919751 | Shield, Heat | Service part / kit |
| 3919814 | Connection, Tur Oil Drain | Service part / kit |
| 3919815 | Tube, Tur Oil Drain | Service part / kit |
| 3919871 | Bracket, Cable | Service part / kit |
| 3921533 | Shield, Dust | Service part / kit |
| 3921724 | Tag, Identification | Service part / kit |
| 3923360 | Plate, Clamping | Service part / kit |
| 3924389 | Washer, Sealing | Service part / kit |
| 3924798 | Shaft, Idler | Service part / kit |
| 3925186 | Screw, Flat Head Cap | Service part / kit |
| 3925568 | Damper, Vibration | Service part / kit |
| 3925749 | Connector, Banjo | Service part / kit |
| 3925883 | Screw, Hex Flange Head Cap | Service part / kit |
| 3926125 | Screw, Hexagon Head Cap | Service part / kit |
| 3926901 | Pulley, Idler | Service part / kit |
| 3930678 | Tube, Vent | Service part / kit |
| 3930903 | Cover, Valve | Service part / kit |
| 3931827 | Tube, Tur Oil Drain | Service part / kit |
| 402-0030 | Part 402-0030 | Service part / kit |
| 41320-D | Shaft, Stub | Service part / kit |
| 416-0444 | Cable, Battery - Negative | Service part / kit |
| 416-0619 | Cable, Battery | Service part / kit |
| 501-0480 | Line, Fuel - Flex (Fuel Out) | Service part / kit |
| 504-0011 | Valve, Shutoff (1/2”) | Service part / kit |
| 505-0021 | Bushing, Pipe - Reducer (3/4º to 1/2º) | Service part / kit |
| 505-0050 | Elbow, Street (1/2' x 90 ° ) | Service part / kit |
| 505-0185 | Nipple, Half (1/2' x 1.5' lg) | Service part / kit |
| 508-0015 | Washer, Insulating - Fiber (#8) | Service part / kit |
| 508-0231 | Bumper Switch, Selector | Service part / kit |
| 526-0003 | #Washer, Flat (#8) | Service part / kit |
| 526-0008 | 148-036’? | Service part / kit |
| 526-0219 | Washer, Flat (1/2) | Service part / kit |
| 526-2140 | Washer, Flat (M12) | Service part / kit |
| 554802 | Washer, Plain | Service part / kit |
| 5818824 | Nut, Hexagon Flange M10 x 1.50 | Service part / kit |
| 62399-N | Key, Square | Service part / kit |
| 70208 | Screw, Pan Head | Service part / kit |
| 800-0008 | Screw, Cap - Hex Head (1/'4-2Ox 1-1/4') | Service part / kit |
| 800-0026 | Screw, Cap - Hex Head (5/16-18 X 3/4') | Service part / kit |
| 800-0091 | Part 800-0091 | Service part / kit |
| 800-0520 | Screw, Cap - Hex Head - Self Locking 3/4-10 x 1" | Service part / kit |
| 800-2058 | Screw, Cap - Hex Head (M8 x 1.25 x 25) | Service part / kit |
| 800-2088 | Screw, Cap - Hex Head | Service part / kit |
| 800-2110 | Hood, Inlet - Air Molded | Service part / kit |
| 800-2111 | Screw, Cap - Hex Head (M12 x 1.25 x 25mm) | Service part / kit |
| 809-0035 | Screw, Machine - Thread Cutting, Round Head (#8 X 3/4') | Service part / kit |
| 815-0172 | Cover, Adapter Outlet | Service part / kit |
| 818-0150 | Rivet | Service part / kit |
| 821-0014 | 2 821-0018 1 3 526-0018 2 4 856-0006 1 5 870-0212 1 6 NOTE 1 REF 7 NOTE 1 REF 8 NOTE 1 | Service part / kit |
| 821-0018 | Screw, Self-locking - Hex Washer Head ( 1'4.20 x 5 8') | Service part / kit |
| 821-0029 | Screw, Self–Locking – Hex Washer Head (3/8–16 x 3/4") | Service part / kit |
| 821-6003-02 | Screw, Cap - Hex Head (M8 x 1.25 x 25mm) | Service part / kit |
| 850-0030 | Washer, Lock - Spring (#10) | Service part / kit |
| 850-0060 | Screw, Cap - Hex Head (5/16-18 X 7-1/2" ) | Service part / kit |
| 850-2005 | Washer, Lock - Spring (M5) | Service part / kit |
| 850-2008 | Washer, Lock (M8) | Service part / kit |
| 850-2010 | Lock | Service part / kit |
| 850-2012 | Washer, Lock - Spring (M12) | Service part / kit |
| 856-0008 | Washer, Lock - EIT (5/16'1) | Service part / kit |
| 856-0013 | Washer, Lock - W/EIT (1/2) | Service part / kit |
| 860-2006 | Genset component (SJB series) | Service part / kit |
| 862-0004 | 4 ttNut, Hex - Set Mounting - Key 2 HARDWARE SET, SET MOUNTING | Service part / kit |
| 862-0016 | Nut, Hex | Service part / kit |
| 863-0002 | Cleaner, Air (Includes Element) | Service part / kit |
| 870-0048 | Nut, Self-locking - Hex (5/16-18) | Service part / kit |
| 870-0053 | Nut, Hex (s10-32) | Service part / kit |
| 870-0196 | Nut, Insulating (#8) | Service part / kit |
| 870-0212 | Nut, Locking (1/4-20) | 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 |
| 870-0281 | Nut, Self-Locking – Hex Washer Head (3/8–16) | Service part / kit |
| 871-0010 | Nut, Hex - Srass (#10-32) Washer, Lock - EIT (#10) Washer, Lock - IT (#10) | Service part / kit |
| S-1008-1 | Connector, Female | Service part / kit |
| S-103-D | Screw, Hexagon Head Cap | Service part / kit |
| S-114 | Screw, Hexagon Head Cap 1/4 - 20 X 3/4 Inch. | Service part / kit |
| S-115 | Screw, Hexagon Head Cap | Service part / kit |
| S-118 | Screw, Hexagon Head Cap | Service part / kit |
| S-118-A | Screw, Hexagon Head Cap | Service part / kit |
| S-168-C | Screw, Hexagon Head Cap | Service part / kit |
| S-224 | Nut, Heavy Hexagon | Service part / kit |
| S-225 | Nut, Heavy Hexagon Jam | Service part / kit |
| S-257 | Nut, Regular Hexagon | Service part / kit |
| S-511 | Pin, Cotter | Service part / kit |
| S-600 | Washer, Lock 1/4 inch | Service part / kit |
| S-608 | Washer, Lock | Service part / kit |
| S-622 | Washer, Plain 3/8 inch | Service part / kit |
| S-907-B | Union, Plain Female | Service part / kit |
| S-920 | Nipple, Plain Pipe | Service part / kit |
| S-960 | Tee, Female Pipe | Service part / kit |
| S-962-E | Draincock | Service part / kit |
| 405-5908 | Panel, Side - Radiator Housing | Panel |
| 405-5917 | Panel, End - Roof | Panel |
| 155-3164-01 | Pipe, Exhaust | Pipe |
| 405-5744 | Post, Housing - Center | Post |
| 405-5916 | Post, Corner - Housing | Post |
| 3802975 | Pump, Water | Pump |
| 3929614 | Pump, Water | Pump |
| 145530 | Seal, O Ring | Seal |
| 3819725 | Clamp, Hose | Seal |
| 3902089 | Seal, O Ring | Seal |
| 3902466 | Seal, Rectangular Ring | Seal |
| 3903475 | Seal, Rectangular Ring | Seal |
| 3905449 | Seal, Rocker Lever Cover | Seal |
| 3907177 | Seal, Rectangular Ring (Cylinder-Block group BP97003) | Seal |
| 3908139 | Front Seal Service Kit, includes installation tools (Front-Gear-Cover group BP9733-04) | Seal |
| 3910824 | Seal, O Ring | Seal |
| 3913994 | Seal, O Ring (Front-Gear-Cover group BP9733-04) | Seal |
| 3931824 | Seal, O Ring | Seal |
| 193-0244 | Sender, Pressure - 0i1 | Sensor |
| 193-0353 | Sender, Temperature - Oil | Sensor |
| 193-0375 | # Sender, Water Temperature | Sensor |
| 309-0269 | Sender, Temperature-Lo Engine | Sensor |
| 3921402 | Motor, Starting | Starter |
| 3921403 | Starter 24V | Starter |
| 3926534 | Housing, Thermostat | Thermostat |
| 3928639 | Thermostat | Thermostat |
| 526-0451 | Washer, Flat - Stainless Steel (M8) | Washer |
| 319-2653 | Window, Control (If Equipped) | Window |
Parts cataloged across all variants of this engine family — verify the exact part fits your specific variant and serial number before ordering.