Service parts for the 1215HQDSB-6042A
Grouped by system, with how many of each the parts manual calls for.
Air intake
1 requiredFuel system
1 requiredOil 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 |
| Voltage options | 120 V, 240 V |
| Phase | 1 |
| Dimensions (L×W×H) | 1043×612×685 mm |
| Dry weight | 220 kg |
| Sound level | 63.0 dBA @ 3 m |
Maintenance & consumables
| Item | Spec | Capacity | Part # | Interval | |
|---|---|---|---|---|---|
| Air filter | Air filter | 140-2105 | eBay $44.01 | ||
| Fuel filter | Fuel filter | 149-2137 | Amazon eBay $37.20 KuduParts $7.00 | ||
| Oil filter | Oil filter | 122-0836 | eBay $18.99 FridayParts $20.28 | ||
| Battery | — | ||||
| Coolant | 50/50 mixture ethylene glycol antifreeze and water | — | |||
| Oil | Onamax SAE-30 or 15W-40 | — | 20 hr | ||
| Spark plug | Green Label resistive original equipment spark plugs | — |
Service intervals
13| 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 level | Check | 8 hr | Check the oil level daily or every 8 hours of operating time; do not check while the generator is running. | |
| 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 | |
| engine oil and oil filter | Change | 150 hr | First service — Every 100 to 150 hours after the first 20-hour change (see Maintenance Chart). | |
| 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 | |
| air filter | Change | 12 mo | Perform at least once a year (footnote 4); more often in dusty environments (footnote 2). | |
| battery and connections | Clean | 1 mo | Clean & check battery & connections monthly; perform more often when operating in hot weather (footnote 3). | |
| coolant system | Drain | 24 mo | Quiet Diesel: flush coolant system at least once every two years (footnote 8). | |
| generator exercise | Other | 1 mo | Run gasoline generators at a minimum of 50 percent capacity (2000 watts, or one air conditioner for a 4000-watt set) for two hours once every four weeks. |
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 | |||
| Coolant | 50/50 mixture of ethylene glycol based antifreeze and water | Use clean, soft water; mix thoroughly before adding; select high quality antifreeze with corrosion inhibitors. | |||
| Engine oil | 15W-40 (OnaMax) | API CF, CF-4, CG-4, CH-4, CI-4 or CJ-4 (diesel engines) | Synthetic oil not recommended during warranty period; synthetic oil does not extend maintenance intervals. | ||
| 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 | ||
| Engine oil | SAE-30 or 15W-40 (OnaMax) | API SJ, SL or SM (gasoline engines) | SAE-30 is the preferred summer grade for air-cooled engines; multi-grade oils (such as SAE 15W-40) recommended for year-round use in liquid-cooled engines. New generators are factory prepared with Onamax 15W-40. | ||
| 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 | ASTM-No.2-D, ASTM-1-D, No.2-DLS, No.1-D, No.1-DLS, B5 Biodiesel; B20 requires additional fuel/water separator | ASTM certified, minimum Cetane number 45 | No.2-D/No.2-DLS for ambient greater than 23F; No.1-D/No.1-DLS for ambient less than 23F; B5 biodiesel for ambient greater than 50F. | ||
| 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 | HD-5 grade liquid propane gas, mixture of at least 90% propane | HD-5 | Propane other than HD-5 can contain more than 2.5 percent butane. | ||
| 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 | ||
| Fuel | Regular unleaded gasoline; Ethanol blend not more than 10%; Methanol blend not more than 5% with solvents and corrosion inhibitors | Gas should not be more than 30 days old; use fresh gas. | |||
| 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.
Fault codes
4| Code | Name | Meaning | Severity | Action |
|---|---|---|---|---|
| 2 | Low oil pressure fault | Two blinks of the status indicator light at a time indicates a low oil pressure fault. | ||
| 3 | Service fault | Three blinks indicates a service fault. Press Stop once to cause the two-digit second-level fault code to blink. | Press Stop once to display the two-digit second-level fault code; press Stop again to stop blinking. | |
| 4 | Overcrank | Four blinks indicates that cranking exceeded 30 seconds without the engine starting. | ||
| 36 | Example second-level fault code | Fault Code No. 36 blinks as: blink-blink-blink (pause) blink-blink-blink-blink-bl (long pause) repeat. |
Extracted from the manufacturer documentation linked to this model. Values are copied as printed; confirm against your unit's manual and serial number.
Procedures
6Carburetor Pre-Heater Setting adjustment
- On carbureted models with a manual pre-heater control lever, set the carburetor air pre-heater for the temperature and humidity at your location.
- For temperatures below 55F and/or high humidity, set the selector in the winter position.
Reading Second-Level Fault Codes diagnostic
- Three blinks indicates a service fault.
- Press Stop once to cause the two-digit, second-level fault code to blink.
- The two-digit code consists of 1, 2, 3, 4 or 5 blinks, a brief pause, then 1 to 9 blinks.
- First set of blinks is the tens digit; second set is the units digit.
- Press Stop again to stop the blinking.
Restoring Fault Code Blinking diagnostic
- Note that blinking stops after five minutes (15 minutes, Series HGJAA).
- Press Stop three times within five seconds to restore blinking.
- The last fault logged will blink even after the condition has been corrected.
Checking Engine Oil Level maintenance
⚠ Hot oil can be thrown out of the dipstick hole, causing severe burns.
- Make sure the vehicle is level when checking oil level.
- Do NOT check the oil level while the generator is running.
- On models with a screw-type dipstick, screw the dipstick in completely for the correct reading, except RV QG 2800/2500 and RV QG 2800/2500 RM where it sits on top of the fill tube.
- Keep the oil level as near as possible to full; do not overfill.
Breaking In Your New Generator operation
- Run the generator at about 50 percent load for two hours.
- Run at about 75 percent load for two hours.
- Let it cool down.
- Change the engine crankcase oil after the first 20 hours of operation, and every 100 to 150 hours thereafter.
Starting And Stopping Procedures operation
- Turn off air conditioners and large electrical loads before starting.
- Before starting in cold weather, turn off all appliances.
- Prime by holding stop (all Quiet Diesels, Quiet Gas 3600-7000).
- Press and hold start at the control panel or at the set.
- Quiet Diesel: auto pre-heat flash, then crank/start.
- Do not over-crank with no start.
- Let the generator warm up a few minutes before turning on appliances.
- Turn off air conditioners and large loads and run 3-5 minutes before stopping.
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 kind of fuel does the Cummins/Onan 1215HQDSB-6042A run on?
The Cummins/Onan 1215HQDSB-6042A runs on diesel.
How loud is the Cummins/Onan 1215HQDSB-6042A?
The Cummins/Onan 1215HQDSB-6042A is rated at 63.0 dBA at 3 m, per the manufacturer specification sheet.
What is the dry weight of the Cummins/Onan 1215HQDSB-6042A?
The Cummins/Onan 1215HQDSB-6042A has a dry weight of 220 kg (485 lb).
What voltages is the Cummins/Onan 1215HQDSB-6042A available in?
The Cummins/Onan 1215HQDSB-6042A is offered in 120 V, 240 V, 1-phase.
What oil filter fits the Cummins/Onan 1215HQDSB-6042A?
The Cummins/Onan 1215HQDSB-6042A uses oil filter part number 122-0836.
What fuel filter fits the Cummins/Onan 1215HQDSB-6042A?
The Cummins/Onan 1215HQDSB-6042A uses fuel filter part number 149-2137.
What air filter fits the Cummins/Onan 1215HQDSB-6042A?
The Cummins/Onan 1215HQDSB-6042A uses air filter part number 140-2105.
Troubleshooting
6Symptoms & remedies
| Symptom | Cause | Remedy |
|---|---|---|
| Fails To Crank | Low battery | Check battery fluid level |
| Fails To Crank | Bad battery connection | Clean & tighten all battery & cable connections |
| Fails To Crank | Blown fuse | Replace fuse on control panel |
| Cranks Slowly | Low battery | Check battery fluid level |
| Cranks Slowly | Bad battery connection | Clean & tighten all battery & cable connections |
| Cranks Slowly | Incorrect oil viscosity | Replace with recommended viscosity oil |
Fault codes and symptom→remedy steps extracted from this model’s service/owner documentation; verify against the official manual before servicing. Full Cummins/Onan 1215HQDSB-6042A troubleshooting guide (61 entries) →
Parts
56| Part # | Description | Qty | System | |
|---|---|---|---|---|
| 122-0645 | Filter, Oil | 1 | Oil filter | Amazon eBay $11.99 NAPA $9.09 |
| 122-0800 | Oil filter | 1 | Oil filter | Amazon eBay $31.23 FridayParts $39.99 |
| 122-0827 | Oil filter | Oil filter | eBay $17.87 FridayParts $20.19 | |
| 122-0833 | Filter, Oil | 1 | Oil filter | Amazon eBay $19.99 NAPA $9.64 FridayParts $20.19 |
| 122-0836 | Oil filter | Oil filter | eBay $18.99 FridayParts $20.28 | |
| 122-0893 | Oil filter | Oil filter | eBay $49.99 | |
| 140-2105 | Air filter | Air filter | eBay $44.01 | |
| 140-2379 | Element, Air Cleaner | 1 | Air filter | Amazon eBay $11.59 NAPA $15.71 |
| 140-2609 | Air filter | Air filter | eBay $9.99 | |
| 140-2680 | Air filter | Air filter | eBay | |
| 140-2842 | Air filter | Air filter | eBay | |
| 140-2897 | Air filter | 1 | Air filter | Amazon eBay $19.99 FridayParts $48.61 |
| 140-3071 | Air filter | 1 | Air filter | Amazon eBay $13.50 FridayParts $16.50 |
| 140-3116 | Air filter | Air filter | eBay $18.99 FridayParts $48.88 | |
| 140-3280 | Air filter | Air filter | eBay $34.03 KuduParts $12.00 FridayParts $14.60 | |
| 140-3351 | Air filter | 1 | Air filter | Amazon eBay $56.44 |
| 147-0806 | Oil filter | Oil filter | eBay | |
| 147-0860 | Fuel filter | 1 | Fuel filter | Amazon eBay $19.99 KuduParts $12.00 |
| 148-0898 | Fuel filter | 1 | Fuel filter | Amazon eBay |
| 149-1353 | Fuel filter | 1 | Fuel filter | Amazon eBay $20.98 NAPA $7.27 |
| 149-1914-05 | Element (Includes Seals) | 1 | Fuel filter | Amazon eBay $41.25 |
| 149-2137 | Fuel filter | 1 | Fuel filter | Amazon eBay $37.20 KuduParts $7.00 |
| 149-2279 | Filter, Fuel | 1 | Fuel filter | Amazon eBay $26.93 KuduParts $31.00 FridayParts $33.04 |
| 149-2333 | Fuel filter | 1 | Fuel filter | Amazon eBay $10.97 KuduParts $8.00 FridayParts $10.50 |
| 149-2341-01 | Fuel filter - at fuel pump | Fuel filter | eBay $9.97 KuduParts $16.00 FridayParts $18.50 | |
| 149-2457 | Air filter | Air filter | eBay $11.50 KuduParts $10.00 FridayParts $12.00 | |
| 149-2513 | Filter, Fuel | 1 | Fuel filter | Amazon eBay $36.95 NAPA $31.59 FridayParts $48.61 |
| 149-2648 | Fuel filter (LP) | Fuel filter | eBay $20.00 | |
| 167-0263-02 | Plug, Spark | 1 | Spark plug | Amazon eBay $15.68 NAPA $2.23 |
| 167-0272 | Spark plug | 2 | Spark plug | Amazon eBay |
| 167-0275 | Spark plug | 1 | Spark plug | Amazon eBay $20.38 |
| 167-0305 | Fuel filter | Fuel filter | eBay | |
| 167-1602 | Cable, Spark Plug | 2 | Spark plug | Amazon eBay $53.93 |
| 167-1638 | Fuel filter | Fuel filter | eBay | |
| 185-2289 | Glow Plug (12 Volt) | Glow plug | Amazon eBay $24.95 | |
| 185-5421 | Plug, Glow | 2 | Glow plug | Amazon eBay $35.00 |
| 185-5835 | Filter, Oil | 1 | Oil filter | Amazon eBay $21.78 NAPA $3.59 FridayParts $20.19 |
| 185-5990 | Glow plug | 4 | Glow plug | Amazon eBay $55.74 |
| 185-6623 | Glow plug | Glow plug | Amazon eBay $39.99 | |
| 185-7444 | Filter, Oil | 1 | Oil filter | Amazon eBay $29.95 NAPA $9.09 KuduParts $11.00 FridayParts $13.23 |
| 187-1000 | Oil filter | 1 | Oil filter | Amazon eBay $63.20 FridayParts $20.19 |
| 187-1289 | Glow plug | 3 | Glow plug | Amazon eBay |
| 326-5336 | OnaMax 15W-40 engine oil, 32 oz. bottle | Fluid | eBay $43.24 | |
| 326-5339 | OnaMax SAE-30 engine oil, 32 oz. bottle | Fluid | eBay $109.19 | |
| 420-0577 | Oil filter wrench (cup-type) | Oil filter | Amazon eBay $19.68 | |
| A026E259 | Adaptor - replaces fuel filter at carb | Fuel filter | eBay | |
| A026K278 | Element, Fuel Filter | 1 | Fuel filter | eBay $99.53 KuduParts $93.00 FridayParts $95.00 |
| 160-1349-01 | Tune-up kit | Service part / kit | eBay | |
| 160-1378 | Electronic Ignition | Service part / kit | Amazon eBay | |
| 167-1615-01 | Cable, Spark Plug 9' | 1 | Service part / kit | Amazon eBay |
| 167-1625-01 | Plug wire, 9 in. | Service part / kit | Amazon eBay | |
| 167-1625-02 | Plug wire 23" | Service part / kit | eBay | |
| 326-5278 | 4C Combustion Chamber And Carburetor Cleaner, 12-oz. aerosol can | Service part / kit | eBay | |
| 326-5288 | Onagard Storage Fogging Spray, 12-oz. aerosol can | Service part / kit | eBay | |
| 326-5342 | Cummins Onan Premium Fuel System Cleaner, 12-oz. bottle | Service part / kit | eBay | |
| 326-5365 | OnaFresh GXLP Fuel Stabilizer, 16 oz. bottle treats 40 gallons | Service part / kit | 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 |
|---|---|---|---|
| 0.76 | 0.2 | ||
| 50% | 1.14 | 0.3 | |
| 100% | 1.51 | 0.4 |
Available documents
Owner's manual — F-1123 Cummins-Onan RV Generator Handbook (07-2010) (Cummins/Onan)Parts manual — F-1123 Cummins-Onan RV Generator Handbook (08-2007) (Cummins/Onan)
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.