Service parts for the D125
Grouped by system, with how many of each the parts manual calls for.
Fuel 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 | 125 kW |
| Standby kVA | 156 |
| Prime power | 114 kW |
| Emissions | EPA Tier 3 |
| Controller | EMCP 3.1 |
| Oil capacity | 16.5 L |
| Alternator | Not specified |
| Voltage options | 277/480 V, 266/460 V, 120/240 V, 127/220 V, 120/208 V, 347/600 V |
| Phase | 3-phase |
| Rated current | 100 A |
| Power factor | 0.8 |
| Circuit breaker | 100 A |
| Battery group | Not specified |
| Battery voltage | 12 V |
| Battery quantity | 1 |
| Coolant capacity | 21.0 L |
| Max ambient | 50 °C |
| Dimensions (L×W×H) | 2780×900×1543 mm |
| Dry weight | 1347 kg |
| Sound level | 97.0 dBA @ 1 m |
| Tank runtime | Not specified hr |
Engine
| Oil capacity | 16.5 L |
|---|---|
| Coolant capacity | 21.0 L |
| Displacement | 6.6 L |
| Aspiration | NA |
| Rated speed | 2300 rpm |
Maintenance & consumables
for the Caterpillar C6.6| Item | Spec | Capacity | Part # | Interval | |
|---|---|---|---|---|---|
| Air filter | Air filter with monitoring system | — | |||
| Fuel filter | — | ||||
| Fuel filter | Cat high efficiency fuel filters with Stay-Clean Valve, primary and secondary filters in engine compartment | 1466695 | Amazon eBay $35.86 FridayParts $33.99 | ||
| Oil filter | Caterpillar air filter for engine compartment | — | |||
| Battery | ×2 | — | |||
| Belt | — | ||||
| Coolant | Extended Life Coolant or conventional heavy-duty coolant | — | |||
| Coolant filter | 50% coolant antifreeze with corrosion inhibitor | — | |||
| Oil | — | ||||
| Spark plug | — |
Compatible filters for the Caterpillar C6.6 — cross-referenced via Donaldson. Options to verify against your serial number, not confirmed for this exact unit.
Common questions
How many kW is the Caterpillar D125?
The Caterpillar D125 is rated 125 kW standby (156.3 kVA).
What engine does the Caterpillar D125 use?
The Caterpillar D125 is powered by the Caterpillar C6.6 engine.
Is the Caterpillar D125 diesel or gas?
The Caterpillar D125 runs on diesel.
What is the oil capacity of the Caterpillar D125?
The Caterpillar C6.6 engine in the Caterpillar D125 has an oil capacity of 16.5 liters.
What alternator comes on the Caterpillar D125?
The Caterpillar D125 uses a Not specified alternator.
What oil filter fits the Caterpillar D125?
The Caterpillar D125 uses oil filter part numbers CATERPILLAR 4621171, CATERPILLAR IR1807.
What fuel filter does the Caterpillar D125 use?
The Caterpillar D125 uses fuel filter part number 1466695.
What air filter does the Caterpillar D125 use?
The Caterpillar D125 uses air filter part numbers CATERPILLAR 2525001, CATERPILLAR 2525002.
Parts
20| Part # | Description | Qty | System | |
|---|---|---|---|---|
| JPR-HDS170 | PUMP ASSY | 1 | Pump | Amazon eBay |
| S200-0369 | Maintenance-free battery, 1000 CCA (2) | 1 | Battery | Amazon eBay |
| S200-0578 | Directional signals, front & rear | 1 | Light | Amazon eBay |
| S200-0632 | Starting and charging system, 24V | 1 | Battery | Amazon eBay |
| S200-0758 | Halogen work lights, front & rear | 1 | Light | Amazon eBay |
| S200-0863 | Keyless ignition stop/start switch | 1 | Ignition | Amazon eBay |
| S200-0957 | Roading lights | 1 | Light | Amazon eBay |
| S200-1038 | Starting aid, thermal | 1 | Ignition | Amazon eBay |
| S200-1156 | Keyless battery disconnect switch | 1 | Battery | Amazon eBay |
| g01162916 | Engine Electronics - Grounding Practices | Grounding practices | Amazon eBay | |
| i02234878 | Electrical System | Electrical system | Amazon eBay | |
| AEHQ5826-01 | Replaces AEHQ5826-01 | Service part / kit | Amazon eBay | |
| INT9-101F | Replaces any core plug | Service part / kit | Amazon eBay | |
| INT9-102F | Replaces any core plug | Service part / kit | Amazon eBay | |
| PA50 | Winch Model PA50 | 1 | Service part / kit | Amazon eBay |
| TPL-489-C | OPERATING & MAINTENANCE OF D175 | Service part / kit | Amazon eBay | |
| g01162918 | Illustration 16 | Service part / kit | Amazon eBay | |
| i01489970 | Generator Isolating for Maintenance | Service part / kit | Amazon eBay | |
| i02328530 | Engine Stopping | Service part / kit | Amazon eBay | |
| i03991620 | Important Safety Information | 1 | 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.
Fuel consumption
| Rating | Load | L/h | gal/h |
|---|---|---|---|
| Prime | 50% | 23.2 | 6.1 |
| Prime | 75% | 30.0 | 7.9 |
| Prime | 100% | 36.0 | 9.5 |
| Standby | 50% | 24.5 | 6.5 |
| Standby | 75% | 31.6 | 8.3 |
| Standby | 100% | 40.6 | 10.7 |