The Mitsubishi S12R-Y1PTA is a 49 L 12-cylinder turbocharged with air cooler engine rated at 1800 rpm, producing up to 1403 kW. It powers generator sets from Doosan, including the INPE-1250. It holds 200 L (52.8 gal) of oil and 120 L (31.7 gal) of coolant.
Also known as: Mitsubishi Heavy Industries, Ltd. S12R-Y1PTA
Part of the Mitsubishi S12R engine family — 12 variants share parts & fitment.
| Oil capacity | 200.0 L |
|---|---|
| Coolant capacity | 120.0 L |
| Displacement | 49.0 L |
| Cylinders | 12 |
| Aspiration | turbocharged with air cooler |
| Rated speed | 1800 rpm |
| Gross power | 1403 kW |
| Item | Spec | Capacity | Part # | Interval | |
|---|---|---|---|---|---|
| Air filter | — | ||||
| Fuel filter | — | ||||
| Oil filter | — | ||||
| Battery | — | ||||
| Belt | — | ||||
| Coolant | 120.0 | — | |||
| Oil | 150.0 | — | |||
| Spark plug | — |
Pooled from every document that names this exact engine — confirm the interval and part number against your unit's serial number.
| Item | Action | Hours | Months | Notes |
|---|---|---|---|---|
| Battery electrolyte level | Inspect | 1 mo | Monthly | |
| Belt and belt tension | Inspect | 12 mo | Every 1 year | |
| Coolant | Change | 24 mo | Every 2 years | |
| Coolant level | Check | 0 mo | Weekly | |
| Damper | Inspect | 1 mo | Monthly | |
| Engine external inspection | Inspect | 0 mo | Check for leakage of fuel, oil and coolant - Weekly | |
| Engine oil for mixing of fuel and water | Inspect | 1 mo | Monthly | |
| Engine oil level | Check | 0 mo | Weekly | |
| Engine oil, Oil filter and Bypass oil filter | Replace | 24 mo | Every 2 years | |
| Fuel control link | Check | 1 mo | Monthly | |
| Fuel filter | Replace | 24 mo | Every 2 years | |
| Fuel tank | Drain | 12 mo | Drain water - Every 1 year | |
| Fuel tank oil level | Check | 0 mo | Weekly | |
| LLC concentration level in coolant | Check | 6 mo | Every 6 months | |
| Valve clearance | Adjust | 12 mo | Every 1 year |
Extracted from the manufacturer documentation linked to this model. Values are copied as printed; confirm against your unit's manual and serial number.
| Type | Item | Value | Unit | Condition |
|---|---|---|---|---|
| Pressure | Fuel injection pressure | 34.32 | MPa | |
| Torque | Air vent plug (fuel filter) | 8.8 ± 1 | N·m | |
| Torque | Air vent plug (fuel injection pump) | 80.5 ± 2.5 | N·m |
Extracted from the manufacturer documentation linked to this model. Values are copied as printed; confirm against your unit's manual and serial number.
| Fluid | Grade | Standard | Ambient | Capacity | Notes |
|---|---|---|---|---|---|
| Coolant | Long Life Coolant (LLC) | 120.0 L | Soft water should be used | ||
| Engine oil | Class CF (API service classification) | API | 150.0 L | Oil pan capacity 150L, whole engine 200L | |
| Fuel | Diesel fuel | JIS or ISO standard diesel |
Extracted from the manufacturer documentation linked to this model. Values are copied as printed; confirm against your unit's manual and serial number.
⚠ Do not use flames near fuel system
Tools: Turning gear, Wrench
⚠ Do not overfill beyond high mark - may cause engine damage
Tools: Oil level gauge, Waste cloth
Extracted from the manufacturer documentation linked to this model. Values are copied as printed; confirm against your unit's manual and serial number.
| Part # | Description | Category |
|---|---|---|
| 30091-08800 | valve lapper | air_filter |
| FTG15L | Air Cleaner | air_filter |
| 45483-61200 | Fuel filter | fuel_filter |
| GU-GST-1365 | VALVE GUIDE AND FUEL PUMP PULLER | fuel_pump |
| 37594-01300 | ThreeBond 1211 liquid gasket | gasket |
| GU-53-YA-40 | GUIDE, VALVE TAPPET | guide |
| 33591-10101 | nozzle remover | injector |
| 45403-51100 | Oil cooler | oil_cooler |
| 36291-00098 | Oil sample bottle set | oil_filter |
| 36291-19100 | Oil sampling pump, pipes | oil_filter |
| 45193-50700 | Oil level gage | oil_level_gage |
| 06.2019 | Radiator | other_service |
| 32591-04200 | valve seat puller | other_service |
| 33591-04300 | valve guide remover | other_service |
| 37191-03200 | piston ring tool | other_service |
| 37507-12500 | Shim 0.10 ± 0.02 mm [0.0039 ± 0.0007 in.] for cylinder liner flange protrusion adjustment | other_service |
| 37507-12510 | Shim 0.05 ± 0.02 mm [0.0020 ± 0.0007 in.] for cylinder liner flange protrusion adjustment | other_service |
| 37507-12520 | Shim 0.15 ± 0.02 mm [0.0059 ± 0.0007 in.] for cylinder liner flange protrusion adjustment | other_service |
| 37591-02400 | eye nut | other_service |
| 37591-02600 | rocker bushing tool | other_service |
| 37591-06200 | liner pusher | other_service |
| 37591-06300 | bolts | other_service |
| 37591-06400 | valve seat cutter | other_service |
| 37591-06430 | valve seat cutter | other_service |
| 37598-09100 | head bolt spacers | other_service |
| 37598-09201 | projection plate O | other_service |
| 43291-00301 | Plunger holder (special tool) | other_service |
| 45191-08400 | Pliers | other_service |
| 45493-50700 | Do not open inspection cover. | other_service |
| 45493-51300 | HIGH PLACE MAY CAUSE FALLING. | other_service |
| 48202-09301 | Sleeve installer | other_service |
| 48202-14100 | Shim (thickness: 0.5 mm [0.0197 in.]) | other_service |
| 48202-14200 | Shim (thickness: 0.6 mm [0.0236 in.]) | other_service |
| 48291-00200 | Plunger spring compression jig | other_service |
| 48291-00301 | Plunger holder | other_service |
| 48291-00400 | Cam thrust ejector | other_service |
| 49160-90101 | snap ring pliers | other_service |
| 49160-90110 | snap ring pliers | other_service |
| 99240-32120 | Pub.No. 99240-32120 | other_service |
| GU-14-Y | VALV - GU-14-Y | other_service |
| GU-14-Y-117 | BODY - GU-14-Y-117 | other_service |
| GU-14-Y-117B | NUT, LOCK - GU-14-Y-117B | other_service |
| GU-14-Y-117C | DE - Y-117C | other_service |
| GU-14-Y-117D | REGULATOR, FUEL PRESSURE - GU-52-YA-117A | other_service |
| GU-14-Y-117E | SCREW, ADJUSTING - GU-14-Y-117E | other_service |
| GU-14-Y-117G | SPRING - GU-14-Y-117G | other_service |
| MM321420 | 7: | pout. eve W11 1 1 1 a | other_service |
| GU-52-Y-94 | PLATE, DECOMPRESSION | plate |
| 48291-00100 | Pump assembly stand | pump |
| 37191-01500 | valve guide seal installer | seal |
| 48202-14300 | tappet | tappet |
| 48202-14400 | tappet | tappet |
| GU-52-Y-121 | TAPPET, VALVE | tappet |
| 32522-04100 | Thermo Label 75°C to 95°C (167°F to 203°F) | thermostat |
| 32522-04200 | Thermo Label 100°C to 120°C (212°F to 248°F) | thermostat |
| 32522-04300 | Thermo label (50 to 70 °C) | thermostat |
| 45493-51800 | Turning gear position (turning shaft) | turning_gear_position |
Parts cataloged across all variants of this engine family — verify the exact part fits your specific variant and serial number before ordering.
The Mitsubishi S12R-Y1PTA engine has an oil capacity of 200.0 liters.
The Mitsubishi S12R-Y1PTA has a displacement of 49.0 liters with 12 cylinders.
The Mitsubishi S12R-Y1PTA powers 1 generator set(s), including Doosan INPE-1250.