Service parts for the DQGAA
Grouped by system, with how many of each the parts manual calls for.
Air intake
1 requiredFuel 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 |
| Standby power | 1250 kW |
| Standby kVA | 1563 |
| Prime power | 1100 kW |
| Emissions | Tier 2 |
| Controller | PC 3.3, PowerCommand 3.3, PowerCommand 3201, PowerCommand PCC 3201 |
| Oil capacity | 235.0 L |
| Voltage options | 220/380 V, 255/440 V, 277/480 V, 347/600 V, 2400/4160 V |
| Phase | 3 |
| Power factor | 0.8 |
| Battery cranking | 1800 CCA |
| Battery voltage | 24 V |
| Coolant capacity | 541 L |
| Max ambient | 40 °C |
| Dimensions (L×W×H) | 5969×2007×2840 mm |
| Dry weight | 10989 kg |
| Wet weight | 11493 kg |
Engine
| Oil capacity | 204.0 L |
|---|---|
| Coolant capacity | 161.0 L |
| Displacement | 50.3 L |
| Aspiration | 4-cycle industrial diesel |
| Rated speed | 1900 rpm |
Filters for the Cummins/Onan QSK50
1Engine-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.
Listed for this engine in only one kind of machine, so they may depend on how the engine was installed:
| System | Filter | Description | Cross-references | |
|---|---|---|---|---|
| Fuel / water separator | P550849 | Fuel Filter, Water Separator Cartridge | CUMMINS 3944901S, NAPA 3763, BALDWIN PF7928, DAVCO 102526 | FridayParts $20.90 KuduParts $39.00 |
Maintenance & consumables
for the Cummins/Onan QSK50| Item | Spec | Capacity | Part # | Interval | |
|---|---|---|---|---|---|
| Air filter | Filter, Air | 140-3963 | Amazon | ||
| Fuel filter | Filter, Fuel | 149-2792 | Amazon eBay | ||
| Oil filter | — | 222 hr | |||
| Battery | ×4 | — | |||
| Belt | — | ||||
| Coolant | 4000.0 | — | |||
| Fuel | ASTM-D975/No.1 or No.2-D | — | |||
| Oil | 235.0 L | — | |||
| Spark plug | — |
Service specifications
60| Type | Item | Value | Unit | Condition |
|---|---|---|---|---|
| Other | AC waveform THD (THDV) | < 5 | % | no load to full linear load |
| Other | BMEP at set rated load (prime) | 1885 | kPa | prime rating |
| Other | BMEP at set rated load (standby) | 2109 | kPa | standby rating |
| Other | Breaker fail to synchronize default time delay | 120 | s | adjustable 10–900 s |
| Other | Combustion air | 124 | m3/min | prime |
| Other | Combustion air | 130 | m3/min | standby |
| Other | Compression ratio | 15:1 | ||
| Other | Derate above 1402 m (4600 ft) / 40 °C | 4.5% per 305 m (1000 ft) and 11.0% per 10 °C (18 °F) | standby and prime | |
| Other | Exhaust flow at set rated load | 261 | m3/min | prime |
| Other | Exhaust flow at set rated load | 291 | m3/min | standby |
| Other | Heat rejected, aftercooler circuit | 19 | MJ/min | prime |
| Other | Heat rejected, aftercooler circuit | 21.98 | MJ/min | standby |
| Other | Heat rejected, jacket water circuit | 26.57 | MJ/min | prime |
| Other | Heat rejected, jacket water circuit | 29.89 | MJ/min | standby |
| Other | High AC voltage shutdown default | 110% | % of nominal voltage | for 10 s; adjustable 105–125%, 0.1–10 s |
| Other | Instantaneous pickup (Ii) range (Micrologic 3.0 and 5.0) | 1.5–12 x In | x In | |
| Other | Long-time delay tr | 0.5–24 | s | at 6 x Ir |
| Other | Long-time pickup (Ir) adjustment range | 0.4–1.0 x In | x In | sensor plug rating In |
| Other | Low AC voltage shutdown default | 85% | % of reference voltage | for 10 s; adjustable 50–95%, 2–20 s |
| Other | Max flow rate at max friction head, aftercooler circuit | 537 | L/min | |
| Other | Max flow rate at max friction head, jacket water circuit | 1893 | L/min | |
| Other | Maximum fuel flow | 912 | L/hr | |
| Other | Maximum fuel flow (optional remote radiator) | 469 | L/hr | |
| Other | Maximum static head, aftercooler circuit | 18.3 | m | |
| Other | Maximum static head, jacket water circuit | 18.3 | m | |
| Other | Over frequency shutdown/warning default | 6 | Hz above nominal | for 20 s, disabled; adjustable 2–10 Hz above set point, 1–20 s |
| Other | Over load (kW) warning default | 105% | % of rated kW | adjustment range 80–140%, 0–120 s delay; default 60 s |
| Other | Piston speed | 11.4 | m/s | |
| Other | Regenerative power | 168 | kW | |
| Other | Reverse Var shutdown default | 20% | % of rated Var | for 10 s; adjustable 15–50%, 10–60 s |
| Other | Reverse power shutdown default | 10% | % of standby kW | for 3 s; adjustable 5–20%, 1–15 s |
| Other | Short circuit protection threshold | 175% | % of rating | output current on any phase |
| Other | Telephone Harmonic Factor (THF) | < 3 | ||
| Other | Telephone Influence Factor (TIF) | < 50 | per NEMA MG1-22.43 | |
| Other | Total heat radiated to room | 10.1 | MJ/min | prime |
| Other | Total heat radiated to room | 11.3 | MJ/min | standby |
| Other | Total heat rejection | 52.43 | MJ/min | prime |
| Other | Total heat rejection | 59.88 | MJ/min | standby |
| Other | Under frequency shutdown default | 6 | Hz below reference | for 10 s; adjustable 2–10 Hz below set point, 5–20 s |
| Other | Wire stripping length | 1.38 In (35 mm) | in | |
| Pressure | BMEP at set rated load | 1606 | kPa | prime |
| Pressure | BMEP at set rated load | 1827 | kPa | standby |
| Pressure | Maximum air cleaner restriction | 3.7 | kPa | |
| Pressure | Maximum air cleaner restriction | 6.2 | kPa | |
| Pressure | Maximum back pressure | 6.78 | kPa | |
| Pressure | Maximum back pressure | 6.8 | kPa | exhaust |
| Pressure | Maximum cooling air flow static restriction | 0.12 | kPa | |
| Pressure | Maximum friction head, aftercooler circuit | 48 | kPa | |
| Pressure | Maximum friction head, jacket water circuit | 67 | kPa | |
| Pressure | Maximum fuel inlet restriction | 16.9 | kPa | |
| Pressure | Maximum fuel inlet restriction | 30 | kPa | |
| Pressure | Maximum fuel return line restriction | 34 | kPa | |
| Speed | Frequency regulation | Isochronous | ||
| Speed | Overspeed limit | 2100 ±50 | rpm | |
| Speed | Piston speed | 9.5 | m/s | |
| Speed | Random frequency variation | ± 0.25 | % | |
| Speed | Rated speed | 1800 | rpm | 60 Hz |
| Temperature | Ambient design (standard set-mounted radiator) | 50 | °C | |
| Temperature | Exhaust temperature | 372 | °C | prime |
| Temperature | Exhaust temperature | 417 | °C | standby |
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 |
|---|---|---|---|---|---|
| Fuel | ASTM D975 No. 2-D | ASTM D975 | Cetane number: 40-50. 300-500 ppm Sulfur. Fuel inlet temperature 40°C (104°F) reference. |
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
10| Code | Name | Meaning | Severity | Action |
|---|---|---|---|---|
| 27 | Low AC voltage shutdown | Voltage on any phase has dropped below a preset value. | Shutdown | Adjustable 50-95% of reference voltage, time delay 2-20 seconds; default 85% for 10 seconds. |
| 32 | Reverse power shutdown | Reverse power detected. | Shutdown | Adjustment range 5-20% of standby kW rating, delay 1-15 seconds; default 10%, 3 seconds. |
| 40 | Reverse Var shutdown | Reverse reactive power detected. | Shutdown | Adjustable 15-50% of rated Var output, delay 10-60 seconds; default 20%, 10 seconds. |
| 46 | Negative sequence overcurrent warning | Excessive imbalances in the three phase load currents and/or power factors. | Warning | Control protects generator from damage due to phase imbalance. |
| 51 | Overcurrent warning/shutdown | Implementation of the thermal damage curve with instantaneous trip level based on CT ratio and application power rating. | Shutdown | AmpSentry protective relay action; see document R1053 time over current curve. |
| 51G | Ground fault overcurrent | Detects a ground fault via external ground fault relay contact input or measured ground current from external CT. | Shutdown | Time delays and thresholds adjustable via InPower or HMI. |
| 59 | High AC voltage shutdown | Output voltage on any phase exceeds preset values; trip time inversely proportional to amount above threshold. | Shutdown | Adjustable 105-125% of nominal voltage, time delay 0.1-10 seconds; default 110% for 10 seconds. |
| 81 u | Under Frequency Shutdown | Genset output frequency cannot be maintained. Adjustable 2-10 Hz below reference governor set point, time delay 5-20 s. Default 6 Hz, 10 s. | Shutdown | |
| 81o | Over frequency shutdown/warning | Genset is operating at a potentially damaging frequency level. | Warning | Adjustable 2-10 Hz above nominal governor set point, 1-20 second delay; default 6 Hz, 20 seconds, disabled. |
| 81u | Under frequency shutdown | Genset output frequency cannot be maintained. | Shutdown | Adjustable 2-10 Hz below reference governor set point, 5-20 second delay; default 6 Hz, 10 seconds. |
Extracted from the manufacturer documentation linked to this model. Values are copied as printed; confirm against your unit's manual and serial number.
Procedures
3Trip Unit Operation Verification diagnostic
Tools: Trip unit test kit
- Connect a test kit to the trip unit test plug receptacle.
- Perform verification tests per instructions shipped with the test kit to verify trip unit functions.
Battery replacement / battery rack installation maintenance
- Isolate DC supply before working on battery connections.
- Install battery rack with hold-down, floor standing.
- Install battery with minimum 2200 amps capacity at -18 °C to 0 °C.
- Verify 24 volt negative ground connection.
Trip Unit Switch Adjustment operation
⚠ Wait a minimum of 15 minutes after circuit breaker trips before resetting to allow thermal imaging to reset completely to zero.
Tools: Wire seal MICROTUSEAL
- Open switch cover.
- Adjust the appropriate switches to desired values.
- Replace switch cover.
- Use wire seal MICROTUSEAL, if necessary, to provide tamper evidence.
Extracted from the manufacturer documentation linked to this model. Values are copied as printed; confirm against your unit's manual and serial number.
Voltage reconnection
| Voltage | Phase | Connection | Leads | Notes |
|---|---|---|---|---|
| 12470-13800 | 3 | Wye, 3-phase | Winding no. 6062 | Temp rise 125/105/80 °C; ADS-521; feature code B448; max surge kVA 91 |
| 220/380 | 3 | 6 leads | 6 | Winding no. 13; 125°C rise rating 2004 kW / 2505 kVA; stator resistance L-L 0.00102 Ohms; rotor resistance 2.31 Ohms @22°C |
| 240/416 | 3 | 6 leads | 6 | Winding no. 13; 125°C rise rating 2004 kW / 2505 kVA; stator resistance L-L 0.00102 Ohms; rotor resistance 2.31 Ohms @22°C |
| 254/440 | 3 | 6 leads | 6 | Winding no. 312; 125°C rise rating 2000 kW / 2500 kVA; stator resistance L-L 0.00152 Ohms; rotor resistance 2.31 Ohms @22°C |
| 277/480 | 3 | 6 leads | 6 | Winding no. 312; 125°C rise rating 2080 kW / 2600 kVA; stator resistance L-L 0.00152 Ohms; rotor resistance 2.31 Ohms @22°C |
| 277/480 | 3 | Wye, 4 Wire | Feature code R002-2 Voltage-277/480, 3 Phase, Wye, 4 Wire | |
| 346/600 | 3 | 6 leads | 6 | Winding no. 07; 125°C rise rating 2080 kW / 2600 kVA; stator resistance L-L 0.00220 Ohms; rotor resistance 2.31 Ohms @22°C |
| 380 | 3 | Wye, 3-phase | Winding no. 7327 | Temp rise 150/125/105 °C; ADS-335; feature code B595; max surge kVA 312 |
| 380 | 3-phase | Wye, 3-phase | Temp rise 150/105 °C; Duty S/P/C; Max surge kVA 6716; Alternator data sheet ADS-331; Feature Code B595-2 | |
| 4160 | 3 | Wye, 3-phase | Winding no. 6307 | Temp rise 125/105/80 °C; ADS-324; feature code B467; max surge kVA 51 |
| 4160 | 3-phase | Wye, 3-phase | Temp rise 105 °C; Duty P; Max surge kVA 6204; Alternator data sheet ADS-322; Feature Code B312-2 | |
| 440 | 3-phase | Wye, 3-phase | Temp rise 80 °C; Duty P; Max surge kVA 5521; Alternator data sheet ADS-330; Feature Code B689-2 | |
| 480 | 3 | Wye, 3-phase | Winding no. 7361 | Temp rise 125/105/80 °C; ADS-333; feature code B462; max surge kVA 312 |
| 480 | 3-phase | Wye, 3-phase | Temp rise 125/105 °C; Duty S/P; Max surge kVA 5521; Alternator data sheet ADS-330; Feature Code B276-2 | |
| 600 | 3 | Wye, 3-phase | Winding no. 7361 | Temp rise 125/105/80 °C; ADS-333; feature code B465; max surge kVA 07 |
| 600 | 3-phase | Wye, 3-phase | Temp rise 125/105 °C; Duty S/P; Max surge kVA 5521; Alternator data sheet ADS-330; Feature Code B602-2 |
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 is the power rating of the Cummins/Onan DQGAA?
The Cummins/Onan DQGAA is rated 1250 kW standby (1563.0 kVA).
Which engine powers the Cummins/Onan DQGAA?
The Cummins/Onan DQGAA is powered by the Cummins/Onan QSK50 engine.
What fuel does the Cummins/Onan DQGAA use?
The Cummins/Onan DQGAA runs on Diesel.
What's the oil capacity on a Cummins/Onan DQGAA?
The Cummins/Onan QSK50 engine in the Cummins/Onan DQGAA has an oil capacity of 204.0 liters.
What is the cooling system capacity of the Cummins/Onan DQGAA?
The Cummins/Onan DQGAA cooling system holds 541 liters (142.9 US gallons) for the radiator system including the engine, per the manufacturer specification sheet.
What is the continuous rating of the Cummins/Onan DQGAA?
The Cummins/Onan DQGAA is rated 1100 kW prime (1375 kVA), against 1250 kW standby.
How much does the Cummins/Onan DQGAA weigh?
The Cummins/Onan DQGAA has a dry weight of 10989 kg (24226 lb).
What voltages is the Cummins/Onan DQGAA available in?
The Cummins/Onan DQGAA is offered in 220/380 V, 255/440 V, 277/480 V, 347/600 V, 2400/4160 V, 3-phase.
How many cold cranking amps does the Cummins/Onan DQGAA require?
The Cummins/Onan DQGAA uses 24 V each, 1800 CCA, per the manufacturer specification sheet.
Which fuel filter part number does the Cummins/Onan DQGAA take?
The Cummins/Onan DQGAA uses fuel filter part number 149-2792.
Which air filter part number does the Cummins/Onan DQGAA take?
The Cummins/Onan DQGAA uses air filter part number 140-3963.
Repair guides
2Step-by-step procedures compiled from the Cummins/Onan service manual for this model.
Parts
11| Part # | Description | Qty | System | |
|---|---|---|---|---|
| 140-3963 | Cleaner, Air (Spec A-C Metal) | 2 | Air filter | Amazon |
| 149-2792 | Filter, Fuel | 1 | Fuel filter | Amazon eBay |
| 501-0970-01 | Line, Fuel | 1 | Hose | Amazon eBay |
| 503-1705 | Hose, Hump | 2 | Hose | Amazon eBay |
| 503-2754-01 | Hose, Oil | 1 | Hose | Amazon eBay |
| 503-2754-02 | Hose, Oil | 1 | Hose | Amazon eBay |
| 543-0088 | Package, Fuel Filter | 1 | Fuel filter | Amazon eBay |
| 6794600 | Washer, Sealing | 1 | Seal | Amazon eBay |
| AF2559300 | Air Cleaner replacement element (Nelson), for Air Cleaner Housing 140-3737 | 1 | Air filter | Amazon eBay |
| 102-1335 | Plug, Oil Drain | 1 | Service part / kit | Amazon eBay |
| 140-1548 | Indicator, Service | 1 | Service part / kit | Amazon eBay $49.99 NAPA $32.16 |
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 |
|---|---|---|---|
| Prime | 25% | 112.9 | 29.8 |
| Prime | 50% | 178.3 | 47.1 |
| Prime | 75% | 243.6 | 64.4 |
| Prime | 100% | 308.9 | 81.6 |
| Standby | 25% | 119.5 | 31.6 |
| Standby | 50% | 191.5 | 50.6 |
| Standby | 75% | 263.5 | 69.6 |
| Standby | 100% | 335.4 | 88.6 |
Available documents
Spec sheet — Cummins-1500-DQGAB QSK50 (Cummins/Onan)Spec sheet — Cummins-DQGAA-data-sheet (Cummins/Onan)Spec sheet — Cummins-DQGAA-spec-sheet (Cummins/Onan)Spec sheet — Cummins-DQGAB-spec-sheet (Cummins/Onan)Spec sheet — New-Cummins-DQKAA-submittal (Cummins/Onan)Parts manual — 0961-0207 I21 202102 (Cummins/Onan)
This page was generated from the 6 manufacturer documents above by automated extraction; every figure shown is copied from one of them. How the data is compiled.