The Caterpillar 3512B HD is a 58.6 L ta engine rated at 1500 rpm. It powers generator sets from Caterpillar, including the DM8235, DM8238 and DM8250. It holds 310.4 L (82.0 gal) of oil and 305.8 L (80.8 gal) of coolant.
Also known as: Caterpillar 3512B HD
Part of the Caterpillar 3512B engine family — 6 variants share parts & fitment.
The cheapest captured merchant offer per filter — see the full cross-reference below for every OEM/aftermarket option.
Prices captured from merchant listings; some links are affiliate links. Verify against your serial number before ordering.
| Oil capacity | 310.4 L |
|---|---|
| Coolant capacity | 305.8 L |
| Displacement | 58.6 L |
| Aspiration | TA |
| Rated speed | 1500 rpm |
| Item | Spec | Capacity | Part # | Interval | |
|---|---|---|---|---|---|
| Air filter | 1327171 | eBay $312.86 | |||
| Fuel filter | 3890433 | Amazon eBay $34.97 FridayParts $71.99 | |||
| Coolant | Cat Extended Life Coolant | 305.8 L | — | ||
| Oil | Sump refill with filter | 310.4 L | — |
Pooled from every document that names this exact engine — confirm the interval and part number against your unit's serial number.
| Type | Item | Value | Unit | Condition |
|---|---|---|---|---|
| Other | Gross Input Torque (TH55-E70) | 12 667 | N•m (9350 lb-ft) | |
| Other | Gross Input Torque (TH55-E90) | 12 677 | N•m (9350 lb-ft) | |
| Other | Rating condition (diesel 7 L and higher) | 99 kPa (29.31 in Hg) dry barometer, 25°C (77°F) | SAE J1995 inlet air standard | |
| Other | Rating condition (diesel up to 6.6 L) | 100 kPa (29.5 in Hg) total barometric pressure, 1 kPa (.295 in Hg) vapor pressure, 25°C (77°F) | ISO/TR14396 inlet air standard | |
| Other | Rating condition (gas) | 100 kPa (29.61 in Hg) and 25°C (77°F) | SAE J1349 standard | |
| Other | Stall Torque Ratio (TH55-E70) | 2.23 | ||
| Other | Stall Torque Ratio (TH55-E90) | 2.23 | ||
| Pressure | WS255 pump plunger load | 238,000 | lb (107,960 kg) | |
| Pressure | WS273XD pump plunger load | 275,000 | lb (124 738 kg) | |
| Pressure | WS305XD pump plunger load | 250,000 | lb (113 398 kg) | |
| Speed | Maximum Input Speed (TH55-E70/TH55-E90 transmissions) | 1970 | rpm | |
| Speed | Rated Input Speed (TH55-E70/TH55-E90 transmissions) | 1900 | rpm |
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 | Cat Extended Life Coolant | 305.8 L | Engine coolant capacity with radiator/exp. tank | ||
| Coolant | SCAC cooling / jacket water | Generator temperature rise based on a 40 degree C ambient per NEMA MG1-32. | |||
| Engine oil | Lubricating oil | 675.0 L | Sump refill with filter; integral lube oil cooler, gear type lube oil pump | ||
| Fuel | 35 API gravity | LHV of 42 780 kJ/kg (18,390 Btu/lb) at 29 C (85 F), weighing 838.9 g/liter (7.001 lbs/U.S. gal.) | |||
| Fuel | 35° API gravity, LHV 42 780 kJ/kg (18,390 btu/lb) | SAE J1995 | Diesel engines 7 liter and higher; used at 29°C (84.2°F) with density 838.9 g/L | ||
| Fuel | EPA 2D 89.330-96 | EPA 2D 89.330-96 | Diesel engines up to 6.6 liter; density 0.845-0.850 kg/L @ 15°C (59°F); fuel inlet temperature 40°C (104°F) | ||
| Fuel | No. 2 diesel fuel, 35º API gravity | LHV 42 780 kJ/kg (18,390 Btu/lb) | Weighing 838.9 g/liter (7.001 lbs/U.S. gal.), used at 29º C (85º F). Consult Cat dealer for Low Sulfur fuel and Biodiesel capability. | ||
| Fuel | dry natural gas, LHV 35.54 MJ/Nm3 (905 btu/ft3) | Gas ratings based on SAE J1349 standard conditions of 100 kPa (29.61 in Hg) and 25°C (77°F) |
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 |
|---|---|---|
| 8N6309 | Air filter outer | Air filter |
| 105-amp | Alternator | Alternator |
| 141-7116 | V-belt | Belt |
| 1R-0755 | High Efficiency Fuel Filter | Filter |
| 1U-5490 | Hydrosolv 4165 liquid cleaner, 19 L (5 US gallon) | Fluid |
| 1U-5492 | Hydrosolv 100 Liquid Cleaner, 19 L (5 US gal) | Fluid |
| 1U-8804 | Hydrosolv 100 Liquid Cleaner, 4 L (1 US gal) | Fluid |
| 1U-8812 | Hydrosolv 4165 Liquid Cleaner, 4 L (1 US gal) | Fluid |
| 5N-5561 | Silicone Lubricant | Fluid |
| 8T-5571 | Hydrosolv 100 - 208 L (55 US gallon) | Fluid |
| 8T-7570 | Hydrosolv 4165 - 208 L (55 US gallon) | Fluid |
| 133-5673 | Fuel/Water Separator | Fuel filter |
| 1R-0749 | Fuel Secondary - ADV | Fuel filter |
| 1R0750 | Filter fuel | Fuel filter |
| 1R0755 | Filter fuel | Fuel filter |
| 1R0756 | Filter fuel | Fuel filter |
| 3S3875 | Filter fuel | Fuel filter |
| 10R9951 | Head Gaskets | Gasket |
| 1744947 | Aftercooler and Lines Gaskets | Gasket |
| 2322507 | Manifold Gaskets | Gasket |
| 2322521 | Turbocharger Gaskets | Gasket |
| 2342795 | Injector Seals/Gaskets | Gasket |
| 1R0741 | Filter hydraulic | Hydraulic filter |
| 2322522 | Reman Injectors | Injector |
| 1R-0716 | Engine Oil | Oil filter |
| 1R-1808 | Engine Oil - ADV | Oil filter |
| 1R0719 | Filter oil | Oil filter |
| 1R0726 | Filter oil | Oil filter |
| 138-8440 | Component cleaner | Service part / kit |
| 1440725 | Connecting rod | Service part / kit |
| 169-8373 | Fluid Sampling Bottle | Service part / kit |
| 174-6854 | Hydrosolv 100 liquid cleaner, 19 L (5 US gallon) | Service part / kit |
| 1743191 | Reman Cylinder Heads | Service part / kit |
| 249-0437 | Oxidation Catalyst Assembly - Round | Service part / kit |
| 4C-9301 | Coolant Conditioner Test Kit | Service part / kit |
| 5P-3413 | Pipe Sealant | Service part / kit |
| 8T-5296 | Coolant Conditioner Test Kit | Service part / kit |
| 9S-3263 | Thread lock | Service part / kit |
| 9S-4030 | Thread lock | Service part / kit |
| PEHJ0271 | Cat® Emissions Upgrade Kits for Select 3500 Marine Engines | Service part / kit |
| PEHJ0287 | Cat® Performance Upgrade Kits for Select 3508, 3512, and 3516 Marine Engines | Service part / kit |
| 1U-5718 | Vacuum Pump | Pump |
| 222-5152 | Water pump repair kit | Pump |
| 9S-8140 | Pressurizing Pump | Pump |
| 113-8432 | Front seal | Seal |
| 4W3864 | Water pump seal | Seal |
| 9G8010 | Switch | Sensor |
| ESD5526 | Speed Controller | Speed controller |
| 248-5513 | Thermostat | Thermostat |
Parts cataloged across all variants of this engine family — verify the exact part fits your specific variant and serial number before ordering.
Cross-referenced via Donaldson + OEM/engine-maker interchange — options to verify against your serial number, not confirmed for every exact variant.
Other equipment known to use this engine, via filter-application cross-reference — useful for sourcing parts even when your exact machine isn't listed elsewhere on this page.
The Caterpillar 3512B HD engine has an oil capacity of 310.4 liters.
The Caterpillar 3512B HD has a displacement of 58.6 liters.
The Caterpillar 3512B HD powers 6 generator set(s), including Caterpillar 3512B HD, Caterpillar DM8235, Caterpillar DM8238, Caterpillar DM8250, Caterpillar DM8259.
The Caterpillar 3512B HD uses fuel filter part numbers Caterpillar 3890433, Donaldson P551316, Wix 33685NP.
The Caterpillar 3512B HD uses air filter part numbers Caterpillar 1327171, Donaldson P526415, Wix 46853.