Service parts for the QSB 6.7
Grouped by system, with how many of each the parts manual calls for.
Air intake
1 requiredElectrical
1 requiredPrices captured from merchant listings; some links are affiliate links. Confirm against your serial number before ordering.
Specifications
| Prime power | 169 kW |
|---|---|
| Emissions | EPA Tier 4 Final/EU Stage IV |
| Oil capacity | 14.2 L |
| Dimensions (L×W×H) | 1074×991×857 mm |
| Dry weight | 634 kg |
Engine
| Oil capacity | 14.2 L |
|---|---|
| Coolant capacity | 14.2 L |
| Displacement | 6.7 L |
| Aspiration | Turbocharged and Charge-Air Cooled |
| Rated speed | 1470 rpm |
Filters for the Cummins/Onan QSB6.7
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 | P550428 | Lube Filter, Spin-On Full Flow | CUMMINS 3937144, CUMMINS 3937736, NAPA 7182, TEREX 0704970120 | KuduParts $61.00 FridayParts $62.99 |
| Fuel filter | P550880 | Fuel Filter, Spin-On | CUMMINS 4897897, CUMMINS 4934845, NAPA 3682, LINDE 0009830544 | buy |
| Fuel / water separator | P550848 | Fuel Filter, Water Separator Spin-On Twist&Drain | CUMMINS 3973233, CUMMINS 4931955, NAPA 3732, LINDE 0019830505 | FridayParts $50.99 |
Same engine, other brands
1 brandThe Cummins/Onan QSB6.7 in this set also powers 1 generator set sold under 1 other brand. Service parts and maintenance intervals for the engine are shared; enclosure, alternator, controller and ratings are not.
| Brand | Models |
|---|---|
| Komatsu | HX20 |
Maintenance & consumables
for the Cummins/Onan QSB6.7| Item | Spec | Capacity | Part # | Interval | |
|---|---|---|---|---|---|
| Air filter | Cummins Filtration AH1196 (standard) and AF26124/AF26125 (heavy duty) | AF26124 | Amazon eBay $60.00 NAPA $150.81 KuduParts $107.00 | ||
| Fuel filter | Cummins Filtration FF5612 (primary) and FS1212 (secondary) | — | |||
| Oil filter | Full-flow with by-pass valve | — | |||
| Battery | 12V-DC, 1500 watts | 12V-DC | Amazon Amazon eBay eBay $69.95 FridayParts $11.85 SinoCMP $65.00 | ||
| Belt | Belt guard | — | |||
| Coolant | Tube and shell type, 60 PSI with NPTF connections | 14.2 L | — | ||
| Coolant filter | Tube and shell type, 60 PSI with NPTF connections | — | |||
| Oil | Oil pressure range at rated: 40-70 PSI (276-483 kPa) | — | |||
| Spark plug | Engine only - cold cranking amperes: 1400 CCA*; Engine only - reserve capacity: 430 minutes* | — |
Service intervals
6| Item | Action | Hours | Months | Notes |
|---|---|---|---|---|
| Lubricating oil | Test | 250 hr | 6 mo | First service — For high horsepower engines with Eliminator™ oil filter option: take oil samples every 250 hours and analyze per Cummins Engine Oil Recommendations Bulletin 3810340; repeat for at least three oil change intervals. |
| filters | Change | 1000 hr | with CENTINEL, depending on load factors | |
| ELIMINATOR self cleaning filter core | Other | 1500 hr | Requires servicing only every 1,500 hours. Saves up to 90% of lube system maintenance costs and increases productivity. | |
| Overhead valve set | Adjust | 5000 hr | QSM, QSX and QSK19 | |
| fuel filter | Change | 1500 hr | Fleetguard NanoNet media | |
| engine oil | Change | 4500 hr | with CENTINEL, railway applications |
Extracted from the manufacturer documentation linked to this model. Values are copied as printed; confirm against your unit's manual and serial number.
Recommended fluids
| Fluid | Grade | Standard | Ambient | Capacity | Notes |
|---|---|---|---|---|---|
| Engine oil | Cummins Engine Oil Recommendations Bulletin 3810340 | Used to analyze oil samples for high horsepower engines with Eliminator™ oil filter option. | |||
| Fuel | B100 biodiesel | ASTM D6751 | Must conform prior to blending; revised to include a cold soak test; stability requirement still in effect. | ||
| Fuel | B20 biodiesel blend | ASTM D7467 | Applies to biodiesel blends B6–B20; includes oxidation stability requirement; replaces Cummins' previous EMA B20 specification requirement. Must be purchased from a BQ9000 Certified Marketer; B100 must be sourced from a BQ9000 Accredited Producer. | ||
| Fuel | B5 biodiesel | All Cummins automotive and industrial engines are compatible with B5 biodiesel. | |||
| Fuel | biodiesel (Europe) | EN 14214 | Published by CEN, European Committee for Standardization. Equivalent biodiesel specifications required internationally. |
Extracted from the manufacturer documentation linked to this model. Values are copied as printed; confirm against your unit's manual and serial number.
Procedures
2Oil sampling for high horsepower engines with Eliminator™ oil filter option maintenance
- Take oil samples every 250 hours of operation.
- Analyze samples according to Cummins Engine Oil Recommendations Bulletin 3810340.
- Repeat for at least three oil change intervals to ensure consistent oil behavior.
Switching from petrodiesel to B20 on used engines maintenance
⚠ B20 has a solvent nature and may clean the vehicle fuel tank and lines.
- Install new fuel filters when switching to B20.
- Replace fuel filters at half the standard interval for the next two fuel filter changes.
- After the initial period, revert to intervals specified in the O & M manual.
- For EPA 2007 on-highway midrange engines, sample oil for the first 6 months to monitor fuel dilution.
Extracted from the manufacturer documentation linked to this model. Values are copied as printed; confirm against your unit's manual and serial number.
Common questions
What engine does the Cummins/Onan QSB 6.7 use?
The Cummins/Onan QSB 6.7 is powered by the Cummins/Onan QSB6.7 engine.
What is the oil capacity of the Cummins/Onan QSB 6.7?
The Cummins/Onan QSB6.7 engine in the Cummins/Onan QSB 6.7 has an oil capacity of 14.2 liters.
What is the cooling system capacity of the Cummins/Onan QSB 6.7?
The Cummins/Onan QSB 6.7 cooling system holds 14.2 liters (3.8 US gallons) for the engine, per the manufacturer specification sheet.
What is the dry weight of the Cummins/Onan QSB 6.7?
The Cummins/Onan QSB 6.7 has a dry weight of 634 kg (1397 lb).
Which air filter part number does the Cummins/Onan QSB 6.7 take?
The Cummins/Onan QSB 6.7 uses air filter part number AF26124.
Parts
1| Part # | Description | Qty | System | |
|---|---|---|---|---|
| 9851268101e | LinkOne parts catalogue, CD | Service part / kit | Amazon |
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 |
|---|---|---|---|
| Continuous | 349.0 | 92.3 | |
| Heavy duty | 469.0 | 123.8 | |
| Medium continuous | 494.0 | 130.7 | |
| Prime | 28.1 | 7.4 | |
| Standby | 47.3 | 12.5 |
Available documents
This page was generated from the 18 manufacturer documents above by automated extraction; every figure shown is copied from one of them. How the data is compiled.