Service parts for the HDCAB
Grouped by system, with how many of each the parts manual calls for.
Air intake
1 requiredFuel system
1 requiredOil system
1 requiredBelts
1 requiredCooling system
1 requiredPrices captured from merchant listings; some links are affiliate links. Confirm against your serial number before ordering.
Specifications
| Fuel | Diesel |
|---|---|
| Frequency | 60.0 Hz |
| Controller | Integrated Microprocessor Based Engine and Generator Controller |
| Oil capacity | 6.3 L |
| Voltage options | 120 V, 240 V |
| Phase | 1 |
| Rated current | 50 A |
| Circuit breaker | 50 A |
| Battery cranking | 650 CCA |
| Battery voltage | 12 V |
| Coolant capacity | 5.8 L |
| Dimensions (L×W×H) | 1050×620×686 mm |
| Dry weight | 300 kg |
| Sound level | 68.0 dBA @ 10 m |
Maintenance & consumables
| Item | Spec | Capacity | Part # | Interval | |
|---|---|---|---|---|---|
| Air filter | Air Filter Element | 12-0389-000 | Amazon eBay | ||
| Fuel filter | Fuel Filter | 12-0398-000 | Amazon eBay | ||
| Oil filter | Oil Filter | 12-0456-000 | Amazon eBay | ||
| Battery | CCA (Cold Cranking Amps) | — | 12000 hr | ||
| Belt | Belt | 12-0399-000 | Amazon eBay | ||
| Coolant | Cooling System Capacity | 6.1 liters | — | 24000 hr | |
| Coolant filter | Coolant Filter | 12-0457-000 | Amazon eBay | ||
| Oil | Oil Capacity (with filter) | 8.0 liters | — | ||
| Spark plug | — | 5000 hr |
Service intervals
7| Item | Action | Hours | Months | Notes |
|---|---|---|---|---|
| Oil level | Check | 8 hr | Check oil daily or every 8 hours of operating time; perform a general inspection daily per Operator's Manual | |
| Engine oil | Change | 50 hr | First service — Break-in: change engine oil after the first 20-50 hours of operation (RV QG/RV QG RM); perform at least once a year | |
| Battery & connections | Clean | 1 mo | Clean & check battery & connections; perform more often in hot weather | |
| Oil/oil filter - Quiet Diesel 10000/12500 | Change | First service — Break-in then repeat (footnotes 1-4, 2-4) | ||
| Oil/oil filter - Quiet Diesel 5500 | Change | First service — Break-in then repeat (footnotes 1-4, 2-4) | ||
| Oil/oil filter - Quiet Diesel 7500/8000 | Change | First service — Break-in then repeat (footnotes 1-4, 2-4) | ||
| Spark arrester | Clean | 1 mo | Clean arrester; perform sooner if engine performance deteriorates |
Extracted from the manufacturer documentation linked to this model. Values are copied as printed; confirm against your unit's manual and serial number.
Service specifications
3| Type | Item | Value | Unit | Condition |
|---|---|---|---|---|
| Other | Power output change with altitude | 3.5 | % decrease per 1000 ft increase | typical power output change based on ambient conditions |
| Other | Power output change with temperature | 1 | % decrease per 10 degF increase | typical power output change based on ambient conditions |
| Temperature | Ambient conditions for rated power output | 77 | degF | with muffler and RV enclosure, per ISO 8528-1; altitude 500 ft (152.4 m), 99 kPa dry |
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 |
|---|---|---|---|---|---|
| Coolant | 50/50 ethylene glycol based antifreeze and water | Mix thoroughly before adding; use clean soft tap water, distilled water or pure rain; select high quality antifreeze with corrosion inhibitors | |||
| Engine oil | SAE 10W-30 / 10W-40 / 0W-30 / 5W-30 | Use viscosity chart to select grade for expected ambient temperature range; avoid mixing grades or brands | |||
| Engine oil | SAE 15W-40 | API CF, CF-4, CG-4, CH-4, CI-4 or CJ-4 (diesel) | OnaMax 15W-40 #326-5336; multi-grade recommended year-round in liquid-cooled engines; synthetic oil not recommended | ||
| Engine oil | SAE-30 | API SJ, SL or SM (gasoline) | OnaMax SAE-30 #326-5339; preferred summer grade for optimum oil consumption control in air-cooled engines | ||
| Fuel | ASTM No.2-D / No.1-D / No.2-DLS / No.1-DLS / B5 Biodiesel | minimum Cetane number 45 | No.2-D or No.2-DLS above 23 degF; No.1-D or No.1-DLS below 23 degF; B5 Biodiesel above 50 degF; use No.1 diesel below 32 degF and during long light-load periods; cloud point at least 10 degF below lowest expected fuel temperature | ||
| Fuel | HD-5 grade liquid propane | at least 90% propane | Fuels other than HD-5 can contain more than 2.5% butane causing poor vaporization/starting below 32 degF | ||
| Fuel | Regular unleaded gasoline | Ethanol blend not more than 10% ethanol; methanol blend not more than 5% methanol | Use fresh gas, not more than 30 days old; fuel stabilizer extends fuel life | ||
| Other | Cummins Onan Premium Fuel System Cleaner | 12.0 oz | Treats up to 24 gallons of gasoline; #326-5342 | ||
| Other | OnaFresh GXLP fuel stabilizer | 16.0 oz | Treats 40 gallons of gasoline; #326-5365 |
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
Is the Cummins/Onan HDCAB diesel or gas?
The Cummins/Onan HDCAB runs on Diesel.
How much coolant does the Cummins/Onan HDCAB hold?
The Cummins/Onan HDCAB cooling system holds 5.8 liters (1.5 US gallons) for the radiator system including the engine, per the manufacturer specification sheet.
What is the oil capacity of the Cummins/Onan HDCAB?
The Cummins/Onan HDCAB has an engine oil capacity of 6.3 liters (6.7 US quarts), per the manufacturer specification sheet.
What is the sound level of the Cummins/Onan HDCAB?
The Cummins/Onan HDCAB is rated at 68.0 dBA at 10 m, per the manufacturer specification sheet.
What is the dry weight of the Cummins/Onan HDCAB?
The Cummins/Onan HDCAB has a dry weight of 300 kg (661 lb).
What voltage does the Cummins/Onan HDCAB produce?
The Cummins/Onan HDCAB is offered in 120 V, 240 V, 1-phase.
How many cold cranking amps does the Cummins/Onan HDCAB require?
The Cummins/Onan HDCAB uses 12 V each, 650 CCA, per the manufacturer specification sheet.
Which oil filter part number does the Cummins/Onan HDCAB take?
The Cummins/Onan HDCAB uses oil filter part number 12-0456-000.
What fuel filter fits the Cummins/Onan HDCAB?
The Cummins/Onan HDCAB uses fuel filter part number 12-0398-000.
Which air filter part number does the Cummins/Onan HDCAB take?
The Cummins/Onan HDCAB uses air filter part number 12-0389-000.
Troubleshooting
6Fault codes
| Code | Meaning | Remedy |
|---|---|---|
| 21 | Starter Solenoid Circuit - controller senses a short circuit | - Check Connections at starter motor - Shorts and/or grounds at solenoid |
| 22 | Governor Actuator Overload - duration of operation at or near full-duty cycle is beyond the design limit | - Check Load - Air intake restriction - Exhaust restriction - Air leak in fuel system |
| 23 | Low Oil Pressure Cutoff Switch | |
| 24 | Temperature Sending Unit | |
| 27 | AC Output Sense Fault |
Symptoms & remedies
| Symptom | Remedy |
|---|---|
| Generator voltage is dead | Generator electrical output connections must be made by a trained and experienced electrician in accordance with applicable codes. The genset must not be connected to the public utility or any other source of electrical power. An approved switching device must be used to prevent interconnections. |
Fault codes and symptom→remedy steps extracted from this model’s service/owner documentation; verify against the official manual before servicing. Full Cummins/Onan HDCAB troubleshooting guide (63 entries) →
Parts
11| Part # | Description | Qty | System | |
|---|---|---|---|---|
| 12-0389-000 | Air Filter Element | 1 | Air filter | Amazon eBay |
| 12-0398-000 | Fuel Filter | 1 | Fuel filter | Amazon eBay |
| 12-0399-000 | Belt | 1 | Belt | Amazon eBay |
| 12-0456-000 | Oil Filter | 1 | Oil filter | Amazon eBay |
| 12-0457-000 | Coolant Filter | 1 | Coolant filter | Amazon eBay |
| 12-0460-000 | Spark Plug | 1 | Spark plug | Amazon eBay |
| 149-2513 | Filter, Fuel | 1 | Fuel filter | Amazon eBay $36.95 NAPA $31.59 FridayParts $48.61 |
| 187-1000 | Filter, Oil | 1 | Oil filter | Amazon eBay $63.20 FridayParts $20.19 |
| 187-1289 | Glow plug | 3 | Glow plug | Amazon eBay |
| F1-15A | Control Circuit Fuse | 1 | Fuse | Amazon eBay FridayParts $368.99 |
| F2-15A | Starter Circuit Fuse | 1 | Fuse | 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 |
|---|---|---|---|
| Full-load | 5.03 | 1.33 | |
| Full-load | 100% | 4.16 | 1.1 |
| Half-load | 2.34 | 0.62 | |
| Half-load | 50% | 2.34 | 0.62 |
| No-load | 0.41 | 0.11 | |
| No-load | 0.41 | 0.11 |
Available documents
This page was generated from the 11 manufacturer documents above by automated extraction; every figure shown is copied from one of them. How the data is compiled.