Cummins 6BTA5.9-G engine is a 6-cylinder diesel engine widely used for generator sets, industrial power units, standby power systems, and continuous power applications. Below is a common and extended spare parts list with part numbers and quantity per engine. This list is suitable for website product pages, spare parts catalogs, and quotation reference.
Common Maintenance Parts
Filters and Service Parts
| Part Name |
Part Number |
Qty Per Engine |
| Oil Filter |
LF3349 / 3908615 |
1 |
| Fuel Filter |
FF5052 / 3931063 |
1 |
| Fuel Water Separator |
FS1280 |
1 |
| Air Filter |
AF25270 / 3939578 |
1 |
| Water Filter |
WF2075 |
1 |
| Fan Belt |
3288790 / 3911563 |
1 |
Engine Overhaul Parts
Piston, Ring and Bearing Parts
| Part Name |
Part Number |
Qty Per Engine |
| Piston |
3907163 / 3802757 |
6 |
| Piston Ring Set |
3802421 / 4089810 |
6 Sets |
| Piston Pin |
3901793 |
6 |
| Piston Pin Retainer |
3900552 |
12 |
| Cylinder Liner |
3904166 |
6 |
| Connecting Rod Bearing |
3901170 |
6 Sets |
| Main Bearing Set |
3802070 |
1 Set |
| Thrust Bearing |
3900068 |
1 Set |
| Connecting Rod |
3901569 |
6 |
Gasket and Seal Parts
Engine Gaskets
| Part Name |
Part Number |
Qty Per Engine |
| Cylinder Head Gasket |
3283333 / 3921394 |
1 |
| Upper Gasket Kit |
3802375 |
1 Set |
| Lower Gasket Kit |
3802376 |
1 Set |
| Full Gasket Kit |
3804896 |
1 Set |
| Valve Cover Gasket |
3902666 |
1 |
| Oil Pan Gasket |
3900632 |
1 |
| Front Crankshaft Oil Seal |
3900709 |
1 |
| Rear Crankshaft Oil Seal |
3906080 |
1 |
Fuel System Parts
Fuel Injection Parts
| Part Name |
Part Number |
Qty Per Engine |
| Fuel Injection Pump |
3917530 / 3973228 |
1 |
| Fuel Injector |
3919350 / 3802677 |
6 |
| Fuel Transfer Pump |
3936316 |
1 |
| Fuel Shutoff Solenoid |
3930234 |
1 |
| High Pressure Fuel Pipe |
3918886 |
6 |
| Fuel Return Pipe |
3905860 |
1 |
| Fuel Pump Gasket |
3908998 |
1 |
Cooling System Parts
Water Pump, Thermostat and Cooling Parts
| Part Name |
Part Number |
Qty Per Engine |
| Water Pump |
3285410 / 3802970 |
1 |
| Thermostat |
3917324 / 4930315 |
1 |
| Thermostat Seal |
3906698 |
1 |
| Fan Hub |
3910739 |
1 |
| Cooling Fan |
3911328 |
1 |
| Radiator Hose |
3918612 |
1 |
| Water Inlet Connection |
3914407 |
1 |
Lubrication System Parts
Oil Pump and Oil Cooler Parts
| Part Name |
Part Number |
Qty Per Engine |
| Oil Pump |
3937404 / 3906415 |
1 |
| Oil Cooler Core |
3906296 |
1 |
| Oil Cooler Cover Gasket |
3900630 |
1 |
| Oil Pan |
3901049 |
1 |
| Oil Dipstick |
3907482 |
1 |
| Oil Pressure Sensor |
3967251 |
1 |
| Oil Filler Cap |
3901895 |
1 |
Air Intake and Exhaust System Parts
Turbocharger and Manifold Parts
| Part Name |
Part Number |
Qty Per Engine |
| Turbocharger |
3529040 / 3802290 |
1 |
| Turbocharger Gasket |
3901356 |
1 |
| Exhaust Manifold |
3901635 |
1 |
| Exhaust Manifold Gasket |
3905443 |
6 |
| Intake Manifold Gasket |
3905443 |
1 Set |
| Air Intake Hose |
3918612 |
1 |
| Turbocharger Oil Pipe |
3909409 |
1 |
Cylinder Head and Valve Train Parts
Valve Components
| Part Name |
Part Number |
Qty Per Engine |
| Cylinder Head |
3966454 / 3917287 |
1 |
| Intake Valve |
3901117 |
6 |
| Exhaust Valve |
3901607 |
6 |
| Valve Spring |
3916691 |
12 |
| Valve Guide |
3904408 |
12 |
| Valve Stem Seal |
3900250 |
12 |
| Push Rod |
3904679 |
12 |
| Rocker Arm |
3934920 |
12 |
Electrical Parts
Starting and Charging Parts
| Part Name |
Part Number |
Qty Per Engine |
| Starter Motor |
3930177 / 4948058 |
1 |
| Alternator |
3972730 / 4936879 |
1 |
| Oil Pressure Switch |
3967251 |
1 |
| Water Temperature Sensor |
3915329 |
1 |
| Speed Sensor |
3034572 |
1 |
| Stop Solenoid |
3930234 |
1 |
Structural and External Engine Parts
Block, Crankshaft and Flywheel Parts
| Part Name |
Part Number |
Qty Per Engine |
| Cylinder Block |
3903920 |
1 |
| Crankshaft |
3907803 / 3929036 |
1 |
| Camshaft |
3906894 |
1 |
| Flywheel |
3913058 |
1 |
| Flywheel Housing |
3903282 |
1 |
| Vibration Damper |
3914454 |
1 |
| Gear Housing |
3907998 |
1 |
| Gear Cover |
3901969 |
1 |
Recommended Spare Parts for One Cummins 6BTA5.9-G Engine
Fast Moving Parts for Stock
| Part Name |
Part Number |
Recommended Qty |
| Oil Filter |
LF3349 / 3908615 |
2-4 |
| Fuel Filter |
FF5052 / 3931063 |
2-4 |
| Air Filter |
AF25270 / 3939578 |
1-2 |
| Fan Belt |
3288790 / 3911563 |
1-2 |
| Water Pump |
3285410 / 3802970 |
1 |
| Thermostat |
3917324 / 4930315 |
1 |
| Fuel Injector |
3919350 / 3802677 |
6 |
| Full Gasket Kit |
3804896 |
1 Set |
| Turbocharger |
3529040 / 3802290 |
1 |
| Starter Motor |
3930177 / 4948058 |
1 |
Buying Notes
How to Confirm Correct 6BTA5.9-G Parts
Before ordering Cummins 6BTA5.9-G engine parts, customers should confirm the engine serial number, CPL number, engine arrangement number, generator set model, fuel pump type, alternator configuration, and production year. Some parts may vary according to different power ratings, emission standards, cooling systems, and governor types.
Applications
Cummins 6BTA5.9-G engine spare parts are commonly used for diesel generator sets, standby power systems, industrial power units, commercial buildings, construction projects, factories, farms, telecom power stations, and emergency backup power applications.
Conclusion
The Cummins 6BTA5.9-G engine has a reliable structure, mature parts supply system, and convenient maintenance. Common spare parts include filters, gasket kits, piston kits, bearings, injectors, water pumps, oil pumps, turbochargers, sensors, starter motors, and alternators. To ensure accurate quotation and fast delivery, customers are advised to provide the engine nameplate, engine serial number, and required quantity before ordering.
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