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 | 136 kW |
|---|---|
| Standby kVA | 147 |
| Prime power | 109 kW |
| Oil capacity | 16.4 L |
| Coolant capacity | 22.1 L |
| Max ambient | 50 °C |
| Dimensions (L×W×H) | 1723×896×1380 mm |
| Dry weight | 718 kg |
Filters for the Cummins/Onan 6B5.9
3Engine-mounted filters the filter manufacturers list for this engine family. These come from the engine, not from this generator set’s own parts list, so confirm against your serial number before ordering.
| System | Filter | Description | Cross-references | |
|---|---|---|---|---|
| Oil filter | P558615 | Lube Filter, Spin-On Full Flow | CUMMINS 10521, CUMMINS 3865405, NAPA 1607, NAPA 61607 | buy |
| Fuel filter | P550440 | Fuel Filter, Spin-On Secondary | CUMMINS 3831063, CUMMINS 3890707, NAPA 3358, BALDWIN BF788 | FridayParts $356.80 |
| Fuel / water separator | P551329 | Fuel Filter, Water Separator Spin-On Twist&Drain | CUMMINS 11E170210, CUMMINS 3890063, NAPA 3357, BALDWIN BF1280 | FridayParts $151.00 |
Maintenance & consumables
for the Cummins/Onan 6B5.9| Item | Spec | Capacity | Part # | Interval | |
|---|---|---|---|---|---|
| Air filter | Cummins Filtration AF26125 | — | |||
| Fuel filter | Recommended fuel filter - primary, secondary | — | 500 hr | ||
| Oil filter | Recommended lube oil filter | — | 250 hr | ||
| Battery | 12V-DC | 12V-DC | Amazon Amazon eBay eBay $69.95 FridayParts $11.85 SinoCMP $65.00 | ||
| Belt | Battery cable size - minimum of 2/0 AWG and maximum cable length not to exceed 6 ft. (1.5 m) | — | |||
| Coolant | 50-percent water and 50-percent ethylene glycol or propylene glycol-base antifreeze; low-silicate meeting ASTM 4985 (GM6038M) | — | 6000 hr | ||
| Coolant filter | N/A | — | |||
| Oil | Oil capacity of pan (high - low) | 15.0 qt | — | 250 hr | |
| Spark plug | — |
Common questions
What is the power rating of the Cummins/Onan 6BTAA5.9-G7?
The Cummins/Onan 6BTAA5.9-G7 is rated 136 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 6B5.9 engine.
How much coolant does the Cummins/Onan 6BTAA5.9-G7 hold?
The Cummins/Onan 6BTAA5.9-G7 cooling system holds 22.1 liters (5.8 US gallons) for the radiator system including the engine, per the manufacturer specification sheet.
What is the oil capacity of the Cummins/Onan 6BTAA5.9-G7?
The Cummins/Onan 6BTAA5.9-G7 has an engine oil capacity of 16.4 liters (17.3 US quarts), per the manufacturer specification sheet.
What is the prime power rating of the Cummins/Onan 6BTAA5.9-G7?
The Cummins/Onan 6BTAA5.9-G7 is rated 109 kW prime (124 kVA), against 136 kW standby.
How much does the Cummins/Onan 6BTAA5.9-G7 weigh?
The Cummins/Onan 6BTAA5.9-G7 has a dry weight of 718 kg (1582 lb).
Parts
23| Part # | Description | Qty | System | |
|---|---|---|---|---|
| 3288689 | Belt | As needed | Belt | Amazon eBay $17.47 NAPA $27.11 FridayParts $35.44 KuduParts $54.00 |
| 3822509 | Injection Pump Bore Brush Service Tool | 1 | Injector | Amazon eBay |
| 3971603 | Starter 12V | As needed | Starter | Amazon eBay $186.96 NAPA $253.51 |
| 4988274 | Alternator | As needed | Alternator | Amazon eBay FridayParts $145.60 |
| FS1251/FF42000 | Fuel Filter | 1 | Fuel filter | buy |
| LF3959 | Lube Filter | 1 | Lube filter | Amazon eBay $16.99 NAPA $15.10 |
| RU5045 | Air Cleaner | 1 | Air filter | Amazon eBay $26.95 NAPA $101.05 |
| 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 |
| 3823494 | Lubricating oil filter | Service part / kit | Amazon eBay | |
| 3824591 | Barring tool Rotate the engine | 1 | Service part / kit | Amazon eBay FridayParts $18.60 |
| 3885910 | Red Paint, Spray can | 1 | 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 |
| C2800 | Fleetguard® refractometer | 1 | Service part / kit | Amazon eBay NAPA $393.59 |
| CC2800 | Fleetguard refractometer | Service part / kit | Amazon eBay |
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
This page was generated from the 2 manufacturer documents above by automated extraction; every figure shown is copied from one of them. How the data is compiled.