Specifications
| Fuel | diesel |
|---|---|
| Frequency | 60.0 Hz |
| Standby power | 175 kW |
| Standby kVA | 219 |
| Controller | Electronic (EFC) |
| Oil capacity | 31.0 L |
| Alternator | UR (3-phase) |
| Voltage options | 208 V, 240 V, 277 V, 480 V |
| Phase | 3-phase |
| Power factor | 0.8 |
| Battery group | BCI-8D |
| Battery voltage | 12 V |
| Battery quantity | 2 |
| Coolant capacity | 53 L |
| Max ambient | 35 °C |
| Dry weight | 2565 kg |
Engine
| Oil capacity | 31.0 L |
|---|---|
| Coolant capacity | 53.0 L |
| Aspiration | turbocharged |
| Rated speed | 1800 rpm |
Maintenance & consumables
for the Cummins/Onan NT-855-G2| Item | Spec | Capacity | Part # | Interval | |
|---|---|---|---|---|---|
| Air filter | — | 250 hr | |||
| Fuel filter | Replace when dirty | — | 1000 hr | ||
| Oil filter | As specified for Cummins engines | — | 250 hr | ||
| Battery | — | 1000 hr | |||
| Belt | — | 50 hr | |||
| Coolant | Ethylene glycol based coolant | 53.0 | — | 50 hr | |
| Coolant filter | Clean or replace as required. See Figure 7 for filter location and replacement procedure. | — | |||
| Oil | SAE 10W-30, 15W-40, or 20W-40 depending on temperature | 31.0 liters | — | 50 hr | |
| Spark plug | — |
Common questions
How many kW is the Cummins/Onan 175 DFE?
The Cummins/Onan 175 DFE is rated 175 kW standby (219.0 kVA).
Which engine powers the Cummins/Onan 175 DFE?
The Cummins/Onan 175 DFE is powered by the Cummins/Onan NT-855-G2 engine.
Is the Cummins/Onan 175 DFE diesel or gas?
The Cummins/Onan 175 DFE runs on diesel.
What's the oil capacity on a Cummins/Onan 175 DFE?
The Cummins/Onan NT-855-G2 engine in the Cummins/Onan 175 DFE has an oil capacity of 31.0 liters.
What alternator comes on the Cummins/Onan 175 DFE?
The Cummins/Onan 175 DFE uses a UR (3-phase) alternator.
Troubleshooting
6Symptoms & remedies
| Symptom | Cause | Remedy |
|---|---|---|
| 1. Green RUN lamp lights following engine Start-up. | Indicates all engine systems are normal. No corrective action required. | |
| 2. PRE Hi ENGINE TEMP lamp lights. Engine continues to operate. | Indicates engine has begun to overheat and engine temperature has risen to approximately 205°F (97°C). If generator is powering non-critical and critical loads and cannot be shutdown, use the following: a. Reduce load if possible by turning off non-critical loads. b. Check air inlets and outlets and remove any obstructions to airflow. c. Open doors or windows in generator area to increase ventilation. If engine can be stopped, follow procedure in step 3. | |
| 3. Hi ENG TEMP lamp lights. Engine shuts down. | Indicates engine has overheated (engine temperature has risen above 215°F/102°C) or coolant level is low (sets with coolant level sensor). Allow engine to cool down completely before proceeding with the following checks: a. Check coolant level and replenish if low. Look for possible coolant leakage points and repair if necessary. b. Check for obstructions to cooling airflow and correct as necessary. c. Check for a slipping fan belt and tighten if loose. d. Reset control and restart after locating and correcting problem. Contact an Onan Dealer or Distributor if none of the above. | |
| 4. PRE LO OIL PRES lamp lights. Engine continues to operate. | Indicates engine oil pressure has dropped to 20 psi (138 kPa). If generator is powering critical loads and cannot be shut down, wait until next shutdown period and then follow step 5 procedure. If engine can be stopped, follow procedures in step 5. | |
| 5. LO OIL PRES lamp lights. Engine shuts down. | Indicates engine oil pressure has dropped to 14 psi (97 kPa). Check oil level, lines and filters. If oil system is okay but oil level is low, replenish. Reset control and restart. Contact an Onan Dealer or Distributor if oil pressure is not in the range of 50 to 70 psi (345 to 483 kPa). | |
| OVERCRANK lamp lights and engine stops cranking. | Engine runs, shuts down, and LO OIL PRES lamp lights. or Engine runs, shuts down, and OVERSPEED lamp lights. | A. Check for empty fuel tank, fuel leaks, or plugged fuel lines and correct as required. b. Check for dirty fuel filter and replace if necessary (see MAINTENANCE section). c. Check for dirty or plugged air filter and replace if necessary (see MAINTENANCE section). d. Refer to Step 5. e. Reset the control and restart after correcting the problem. Contact an Onan Dealer or Distributor for service if none of the above. |
Fault codes and symptom→remedy steps extracted from this model’s service/owner documentation; verify against the official manual before servicing. Full Cummins/Onan 175 DFE troubleshooting guide (17 entries) →
Parts
5| Part # | Description | Qty | System | |
|---|---|---|---|---|
| 8342-1 | AIR FILTER | Air filter | Amazon eBay FridayParts $44.80 | |
| 903-0124 | NA | NA | Service part / kit | Amazon eBay |
| 903-0204 | NA | NA | Service part / kit | Amazon eBay |
| 903-0500 | NA | NA | Service part / kit | Amazon eBay |
| 903-0604 | NA | NA | 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.
Available documents
Operator's manual — 960-0132 Onan DFE Operator's Manual (10-1986) (Cummins/Onan)