Service parts for the 1250REOZDD
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 | 1300 kW |
| Standby kVA | 1625 |
| Prime power | 1180 kW |
| Emissions | Tier 2 |
| Controller | Decision-Maker 550, Decision-Maker 6000 |
| Oil capacity | 260.0 L |
| Alternator | Fast-Response PMG (Class Class H insulation) |
| Voltage options | 480 V |
| Phase | 3-phase |
| Rated current | 1955 A |
| Power factor | 0.8 |
| Battery cranking | 1150 CCA |
| Battery voltage | 12 V |
| Battery quantity | 4 |
| Coolant capacity | 560.0 L |
| Max ambient | 40 °C |
| Dimensions (L×W×H) | 6104×2232×2538 mm |
Engine
| Oil capacity | 260.0 L |
|---|---|
| Coolant capacity | 160.0 L |
| Displacement | 57.2 L |
| Aspiration | Exhaust turbocharging (ETC) and charge air cooling (CAC) |
| Rated speed | 1800 rpm |
Filters for the MTU 12V 4000 G43
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 | NAPA 3763, BALDWIN PF7928, DAVCO 102526, DAVCO 102527 | FridayParts $20.90 KuduParts $39.00 |
Same engine, other brands
2 brandsThe MTU 12V 4000 G43 in this set also powers 4 generator sets sold under 2 other brands. Service parts and maintenance intervals for the engine are shared; enclosure, alternator, controller and ratings are not.
| Brand | Models |
|---|---|
| MTU | 12V4000 DS1250, DP 1430 D6S RW, MTU 12V4000 DS1250 |
| Hipower | HMW 1550 T6 |
Maintenance & consumables
for the MTU 12V 4000 G43| Item | Spec | Capacity | Part # | Interval | |
|---|---|---|---|---|---|
| Air filter | Dry | — | |||
| Fuel filter | Secondary | ×1 | — | ||
| Fuel filter | Standard fuel filter | 33763 | Amazon eBay $29.99 PartsGeek $29.97 NAPA $43.99 | ||
| Oil filter | Spin-On | ×4 | — | ||
| Battery | Battery Box and Cables | — | |||
| Belt | Blower Fan and Fan Drive, Radiator - Unit Mounted, Electric Starting Motor - 24V, Jacket Water Pump, Inter Cooler Water Pump | — | |||
| Coolant | 583.0 L | — | |||
| Coolant filter | N/A | — | |||
| Oil | 260.0 L | — | |||
| Spark plug | — |
Service specifications
30| Type | Item | Value | Unit | Condition |
|---|---|---|---|---|
| Other | 10 in. weld flange bolt circle diameter B | 361.95 | mm (14.25 in.) | |
| Other | 10 in. weld flange outside diameter C | 406.4 | mm (16.0 in.) | |
| Other | 10 in. weld flange quantity of bolts / bolt hole diameter D | 12, 25.40 | mm (1.00 in.) | |
| Other | 12 in. weld flange bolt circle diameter B | 431.80 | mm (17.00 in.) | |
| Other | 12 in. weld flange outside diameter C | 482.6 | mm (19.0 in.) | |
| Other | 12 in. weld flange quantity of bolts / bolt hole diameter D | 12, 25.40 | mm (1.00 in.) | |
| Other | 14 in. weld flange bolt circle diameter B | 476.25 | mm (18.75 in.) | |
| Other | 14 in. weld flange outside diameter C | 533.4 | mm (21.0 in.) | |
| Other | 14 in. weld flange quantity of bolts / bolt hole diameter D | 12, 28.58 | mm (1.13 in.) | |
| Other | 16 in. weld flange bolt circle diameter B | 539.75 | mm (21.25 in.) | |
| Other | 16 in. weld flange outside diameter C | 596.9 | mm (23.5 in.) | |
| Other | 16 in. weld flange quantity of bolts / bolt hole diameter D | 16, 28.58 | mm (1.13 in.) | |
| Other | 18 in. weld flange bolt circle diameter B | 577.85 | mm (22.75 in.) | |
| Other | 18 in. weld flange outside diameter C | 635.0 | mm (25.0 in.) | |
| Other | 18 in. weld flange quantity of bolts / bolt hole diameter D | 16, 31.75 | mm (1.25 in.) | |
| Other | 20 in. weld flange bolt circle diameter B | 635.00 | mm (25.00 in.) | |
| Other | 20 in. weld flange outside diameter C | 698.5 | mm (27.5 in.) | |
| Other | 20 in. weld flange quantity of bolts / bolt hole diameter D | 20, 31.75 | mm (1.25 in.) | |
| Other | 5 in. weld flange bolt circle diameter B | 215.90 | mm (8.50 in.) | |
| Other | 5 in. weld flange outside diameter C | 241.30 | mm (9.50 in.) | |
| Other | 5 in. weld flange quantity of bolts / bolt hole diameter D | 8, 22.23 | mm (0.88 in.) | |
| Other | 6 in. weld flange bolt circle diameter B | 254.0 | mm (10.0 in.) | |
| Other | 6 in. weld flange outside diameter C | 279.4 | mm (11.0 in.) | |
| Other | 6 in. weld flange quantity of bolts / bolt hole diameter D | 8, 22.23 | mm (0.88 in.) | |
| Other | 8 in. weld flange bolt circle diameter B | 298.45 | mm (11.75 in.) | |
| Other | 8 in. weld flange outside diameter C | 342.9 | mm (13.5 in.) | |
| Other | 8 in. weld flange quantity of bolts / bolt hole diameter D | 8, 22.23 | mm (0.88 in.) | |
| Other | Weld flange angle A (10, 12, 14 in. nominal pipe size) | 30 | deg. | |
| Other | Weld flange angle A (16, 18, 20 in. nominal pipe size) | 22.5 | deg. | |
| Other | Weld flange angle A (5, 6, 8 in. nominal pipe size) | 45 | deg. |
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 |
|---|---|---|---|---|
| 12-lead optional voltage connections | 12 | Alternator optional feature | ||
| 4-lead dedicated voltages | 4 | Alternator standard feature | ||
| 110/127/139/240/254/277 | single-phase | switchable | Towable generator model specifications; some models n/a | |
| 208/220/240/415/440/480 | 3-phase | reconnectable | Towable generator model specifications | |
| 208/220/240/415/440/480 | 3-phase | switchable | Towable generator model specifications |
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 size generator is the Kohler 1250REOZDD?
The Kohler 1250REOZDD is rated 1300 kW standby (1625.0 kVA).
What engine is in the Kohler 1250REOZDD?
The Kohler 1250REOZDD is powered by the MTU 12V 4000 G43 engine.
What fuel does the Kohler 1250REOZDD use?
The Kohler 1250REOZDD runs on diesel.
What is the oil capacity of the Kohler 1250REOZDD?
The MTU 12V 4000 G43 engine in the Kohler 1250REOZDD has an oil capacity of 260.0 liters.
What is the cooling system capacity of the Kohler 1250REOZDD?
The Kohler 1250REOZDD cooling system holds 560 liters (147.9 US gallons) for the radiator system including the engine, per the manufacturer specification sheet.
What is the prime power rating of the Kohler 1250REOZDD?
The Kohler 1250REOZDD is rated 1180 kW prime (1475 kVA), against 1300 kW standby.
What voltages is the Kohler 1250REOZDD available in?
The Kohler 1250REOZDD is offered in 480 V, 3-phase-phase.
What size battery does the Kohler 1250REOZDD need?
The Kohler 1250REOZDD uses 4 batteryies, 12 V each, 1150 CCA, per the manufacturer specification sheet.
What alternator does the Kohler 1250REOZDD use?
The Kohler 1250REOZDD uses a Fast-Response PMG alternator. Insulation class Class H.
What fuel filter does the Kohler 1250REOZDD use?
The Kohler 1250REOZDD uses fuel filter part number 33763.
Parts
16model family| Part # | Description | Qty | System | |
|---|---|---|---|---|
| 279720 | Hose, hump | 4 | Hose | Amazon |
| 279736 | Element, primary | 2 | Air filter | Amazon eBay NAPA $228.15 |
| 279737 | Element, secondary | 2 | Air filter | Amazon eBay |
| 279738 | Element, primary | 1 | Air filter | Amazon eBay KuduParts $248.00 |
| 279739 | Element, air cleaner, inner | 1 | Air filter | Amazon eBay FridayParts $165.75 |
| 347957 | Hose, 45 deg elbow, 8.00 in. ID | 1 | Hose | buy |
| GM23518 | Hose, hump, 8.00 in. ID | 1 | Hose | buy |
| GM23519 | Hose, 90 deg elbow, 8.00 in. ID | 1 | Hose | buy |
| GM24553 | Alternator Belt | Belt | Amazon eBay | |
| GM28302 | Hose, straight air, 8.00 in. ID | 1 | Hose | buy |
| GM30213 | Thermostat | Thermostat | eBay | |
| GM35390 | Seal | Seal | eBay $27.99 | |
| GM51785 | Alternator Belt | Belt | Amazon eBay | |
| GM64086 | Alternator Belt | Belt | Amazon eBay | |
| GM69997 | Element, Primary (Outer) | 1 | Air filter | Amazon eBay $108.80 |
| GM69998 | Element, Secondary (Inner) | 1 | Air filter | Amazon eBay $66.30 |
Compiled from this model's family documentation — may include parts for closely-related variants. 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% | 104.5 | 27.6 |
| Prime | 50% | 174.1 | 46.0 |
| Prime | 75% | 243.4 | 64.3 |
| Prime | 100% | 313.1 | 82.7 |
| Standby | 25% | 113.6 | 30.0 |
| Standby | 50% | 194.6 | 51.4 |
| Standby | 75% | 276.0 | 72.9 |
| Standby | 100% | 357.0 | 94.3 |
Available documents
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.