Service parts for the 6BTAA5.9-G7
Grouped by system, with how many of each the parts manual calls for.
Electrical
1 requiredPrices captured from merchant listings; some links are affiliate links. Confirm against your serial number before ordering.
Specifications
| Standby power | 160 kW |
|---|---|
| Standby kVA | 147 |
| Prime power | 145 kW |
| Oil capacity | 16.4 L |
| Coolant capacity | 21.4 L |
| Max ambient | 50 °C |
| Dimensions (L×W×H) | 1723×896×1380 mm |
| Dry weight | 718 kg |
Engine
| Oil capacity | 14.2 L |
|---|---|
| Coolant capacity | 15.1 L |
| Displacement | 5.9 L |
| Aspiration | Turbocharged and after-cooled |
| Rated speed | 2100 rpm |
Maintenance & consumables
for the Cummins/Onan B5.9 Series| Item | Spec | Capacity | Part # | Interval | |
|---|---|---|---|---|---|
| Air filter | Cummins Filtration AF26125 | — | |||
| Fuel filter | Recommended fuel filter - primary, secondary | — | |||
| Oil filter | Recommended lube oil filter | — | |||
| Battery | 12V-DC | 12V-DC | Amazon Amazon eBay eBay $69.95 FridayParts $11.85 | ||
| Belt | Battery cable size - minimum of 2/0 AWG and maximum cable length not to exceed 6 ft. (1.5 m) | — | |||
| Coolant filter | N/A | — | |||
| Oil | Oil capacity of pan (high - low) | 15.0 qt | — | ||
| Spark plug | — |
Common questions
What is the power rating of the Cummins/Onan 6BTAA5.9-G7?
The Cummins/Onan 6BTAA5.9-G7 is rated 160 kW standby (147.0 kVA).
What engine is in the Cummins/Onan 6BTAA5.9-G7?
The Cummins/Onan 6BTAA5.9-G7 is powered by the Cummins/Onan B5.9 Series engine.
How much oil does the Cummins/Onan 6BTAA5.9-G7 take?
The Cummins/Onan B5.9 Series engine in the Cummins/Onan 6BTAA5.9-G7 has an oil capacity of 14.2 liters.
Parts
37| Part # | Description | Qty | System | |
|---|---|---|---|---|
| 07200008 | Lubricating Oil and Filters - Drain Plug | Oil filter | eBay | |
| 07800018 | Lubricating Oil and Filters - Drain Plug | Oil filter | eBay | |
| 07900232 | Lubricating Oil and Filters - Drain Plug | Oil filter | eBay | |
| 15800004 | Cooling Fan Belt Tensioner - Tensioner | Belt | eBay | |
| 3288689 | Belt | As needed | Belt | Amazon $27.10 eBay $17.47 FridayParts $35.44 |
| 3375049 | Oil Filter Wrench | 1 | Oil filter | Amazon eBay |
| 3376807 | Engine coolant and fuel filter wrench | 1 | Fuel filter | Amazon eBay |
| 3971603 | Starter 12V | As needed | Starter | Amazon eBay $186.96 |
| 4988274 | Alternator | As needed | Alternator | Amazon eBay FridayParts $145.60 |
| CC2602 | Fleetguard DCA4 test kit | Test kit | Amazon eBay | |
| Coolant-008 | Coolant | 1 | Coolant filter | eBay |
| FS1251/FF42000 | Fuel Filter | 1 | Fuel filter | buy |
| LF3959 | Lube Filter | 1 | Lube filter | Amazon $32.10 eBay $16.99 |
| RU5045 | Air Cleaner | 1 | Air filter | Amazon eBay $26.95 |
| V70509 | Lube Oil | 4 Gal. | Fluid | Amazon eBay |
| 12.001-3678-000 | Lubricating Oil Pressure Gauge | 1 | Service part / kit | buy |
| 13.001-3901-000 | Battery A/B Switch | 1 | Service part / kit | buy |
| 14.001-3912-000 | ON/OFF Switch (AUTO/MANUAL) | 1 | Service part / kit | buy |
| 3305062 | Heater, 240V | As needed | Service part / kit | Amazon eBay |
| 3315032 | Heater, 120V | As needed | Service part / kit | Amazon eBay |
| 3375045 | Torque wrench (0 to 175 ft-lb) | 1 | Service part / kit | eBay |
| 3377161 | Digital multimeter | 1 | Service part / kit | Amazon eBay |
| 3824556 | Charge air cooler (CAC) pressure kit | 1 | Service part / kit | eBay |
| 3824591 | Engine barring gear | 1 | Service part / kit | Amazon eBay FridayParts $18.60 |
| 3824783 | Torque wrench (0 to 300 in-lb) | 1 | Service part / kit | eBay |
| 3824842 | M10 Compucheck® fitting | 1 | Service part / kit | eBay |
| 3885910 | Red Paint, Spray can | 3 | Service part / kit | Amazon eBay |
| 5.001-2674-000 | True Warning Light | 1 | Service part / kit | buy |
| 6.001-3789-000 | Low Oil Pressure Warning Light | 1 | Service part / kit | buy |
| 7.001-3890-000 | Circuit Breaker | 1 | Service part / kit | buy |
| 8210G003-12VDC | 3/4" 12V solenoid | As needed | Service part / kit | Amazon eBay |
| 8210G3-24VDC | 3/4" 24V solenoid | As needed | Service part / kit | Amazon eBay |
| QSK19 | Fuel System | Service part / kit | Amazon eBay $327.95 FridayParts $9.94 | |
| QST30 | QST30 | Service part / kit | Amazon eBay FridayParts $10.28 | |
| QSX15 | QSZ13* | Service part / kit | Amazon eBay FridayParts $8.65 | |
| QSX45 | QSX45 | Service part / kit | Amazon eBay | |
| V903 | V903 (525-675 hp) | Service part / kit | Amazon eBay FridayParts $11.24 |
Service, wear & replacement parts referenced for this model and its engine — confirm the exact part for your serial number. See the full parts catalog to search and cross-reference.
Fuel consumption
| Rating | Load | L/h | gal/h |
|---|---|---|---|
| Base | 100% | 16.0 | 4.3 |
| Continuous | 100% | 26.0 | 6.9 |
| Prime | 25% | 19.0 | 5.0 |
| Prime | 50% | 26.0 | 6.9 |
| Prime | 75% | 29.0 | 7.5 |
| Prime | 100% | 37.0 | 9.8 |
| Standby | 25% | 9.0 | 2.5 |
| Standby | 50% | 19.0 | 5.0 |
| Standby | 75% | 29.0 | 7.5 |
| Standby | 100% | 41.0 | 10.9 |
Available documents
Spec sheet — 0070818 (Cummins/Onan)Spec sheet — 6BTAA5.9G7 (Cummins/Onan)