Service parts for the 3512
Grouped by system, with how many of each the parts manual calls for.
Air intake
1 requiredEquivalents: WIX 533180, DONALDSON P181126, BALDWIN PF823-E
Fuel system
1 requiredEquivalents: FLEETGUARD AF876, BALDWIN BF7633, NAPA 3356
Oil system
1 requiredEquivalents: FLEETGUARD HF6097, BALDWIN PT189, CATERPILLAR 1M9150
Belts
1 requiredCooling system
1 requiredElectrical
1 requiredHydraulic system
1 requiredPrices captured from merchant listings; some links are affiliate links. Confirm against your serial number before ordering.
Specifications
| Fuel | diesel |
|---|---|
| Frequency | 50.0 Hz |
| Standby power | 600 kW |
| Standby kVA | 1250 |
| Prime power | 1000 kW |
| Emissions | Low BSFC |
| Controller | ADEM A3, Adem Ii, EMCP 4.2, EMCP 4.3, EMCP 4.4 |
| Alternator | SR4 |
| Voltage options | 600 V |
| Phase | 3 phase |
| Rated current | 1684 A |
| Power factor | 0.7 |
| Circuit breaker | [2000, 2500, 3200, 4000] A |
| Coolant capacity | 244 L |
| Max ambient | 80 °C |
| Dimensions (L×W×H) | 2676×1703×1720 mm |
| Dry weight | 5736 kg |
Filters for the Caterpillar 3512 D1
4Engine-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.
| System | Filter | Description | Cross-references | |
|---|---|---|---|---|
| Oil filter | P551808 | Lube Filter, Spin-On Full Flow | CATERPILLAR 1R1808, CATERPILLAR 1R808, NAPA 7792, BALDWIN B7299 | KuduParts $80.00 |
| Fuel filter | P551316 | Fuel Filter, Spin-On | CATERPILLAR 1R0755, CATERPILLAR 3890433, NAPA 3685, BALDWIN BF7639 | KuduParts $54.00 FridayParts $55.99 |
| Fuel filter | P551313 | Fuel Filter, Spin-On Secondary | CATERPILLAR 1R0763, BALDWIN BF7633, LOESING 025135, INGERSOLL RAND 1R0750 | KuduParts $17.00 |
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 | P552020 | Fuel Filter, Water Separator Cartridge | CATERPILLAR 1110716, CATERPILLAR 3I1252, BALDWIN PF7890-10, IMPERIAL 04FS1206 | buy |
Maintenance & consumables
for the Caterpillar 3512 D1| Item | Spec | Capacity | Part # | Interval | |
|---|---|---|---|---|---|
| Air filter | Air filter outer | 8N6309 | eBay $89.68 NAPA $186.85 KuduParts $185.00 FridayParts $290.20 | ||
| Fuel filter | Filter fuel | 1R0750 | Amazon eBay $33.80 eBay $33.80 NAPA $21.82 NAPA $21.82 KuduParts $17.00 FridayParts $29.50 | ||
| Oil filter | Filter oil | 1R0719 | eBay $20.00 FridayParts $31.32 KuduParts $58.00 | ||
| Battery | 245-5829 | Amazon eBay $98.00 | |||
| Belt | V-belt | 141-7116 | eBay $31.99 NAPA $16.79 FridayParts $22.60 | ||
| Coolant | 9S-8140 | Amazon eBay | |||
| Hydraulic filter | Filter hydraulic | 1R0741 | eBay $22.00 NAPA $25.37 | ||
| Oil | CF-4 | — | 1000 hr | ||
| Spark plug | — |
Service intervals
40| Item | Action | Hours | Months | Notes |
|---|---|---|---|---|
| System | Test | 1 hr | ToCI quarterly: exercise system under full load for 1 hour | |
| Cooling System Coolant Level | Check | 8 hr | Daily | |
| Driven Equipment | Other | 8 hr | Daily; Inspect/Replace/Lubricate | |
| Engine Air Cleaner Differential Pressure | Check | 8 hr | Daily | |
| Engine Air Precleaner | Clean | 8 hr | Daily | |
| Engine Oil Filter Differential Pressure | Check | 8 hr | Daily | |
| Engine Oil Level | Check | 8 hr | Daily | |
| Fuel System Fuel Filter Differential Pressure | Check | 8 hr | Daily | |
| Fuel System Primary Filter/Water Separator | Drain | 8 hr | Daily | |
| Fuel Tank Water and Sediment | Drain | 8 hr | Daily | |
| Instrument Panel | Inspect | 8 hr | Daily | |
| Walk-Around Inspection | Inspect | 8 hr | Daily | |
| Zinc Rods | Inspect | 50 hr | Inspect/Replace | |
| Alternator and Fan Belts | Inspect | 250 hr | Every 250 Service Hours; Inspect/Adjust/Replace | |
| Battery Electrolyte Level | Check | 250 hr | Every 250 Service Hours | |
| Belts | Adjust | 250 hr | ||
| Belts | Inspect | 250 hr | Inspect/Adjust/Replace; Every 250 Service Hours | |
| Cooling System Coolant Sample (Level 1) | Other | 250 hr | Obtain; Every 250 Service Hours | |
| Cooling System Supplemental Coolant Additive (SCA) | Test | 250 hr | Test/Add; Every 250 Service Hours | |
| Engine Oil Sample | Other | 250 hr | Obtain; Every 250 Service Hours | |
| Engine Oil Sample | Test | 250 hr | Every 250 Service Hours - Obtain | |
| Engine Valve Lash | Adjust | 4000 hr | First service — Inspect/Adjust; Initial 250 Service Hours | |
| Fan Drive Bearing | Lubricate | 250 hr | Every 250 Service Hours | |
| Fuel Injector | Adjust | 4000 hr | First service — Inspect/Adjust; Initial 250 Service Hours | |
| Fuel System Primary Filter | Clean | 250 hr | Every 250 Service Hours; Clean/Inspect/Replace | |
| Fuel System Primary Filter | Replace | 1000 hr | Every 250 Service Hours; Clean/Inspect/Replace | |
| Fuel System Secondary Filter | Replace | 1000 hr | Every 250 Service Hours | |
| Hoses and Clamps | Inspect | 250 hr | Inspect/Replace; Every 250 Service Hours | |
| Magnetic Pickups | Clean | 6000 hr | 72 mo | First service — Initial 250 Service Hours; Clean/Inspect |
| Magnetic Pickups | Inspect | 6000 hr | 72 mo | First service — Initial 250 Service Hours (or at first oil change); Clean/Inspect |
| Radiator | Clean | 250 hr | Every 250 Service Hours | |
| Speed Sensor | Clean | 6000 hr | 72 mo | First service — Initial 250 Service Hours; Clean/Inspect |
| Air Shutoff | Test | 500 hr | Every 500 Service Hours (Prime Power) | |
| Cooling System Coolant Sample (Level 1) | Test | 500 hr | Every 500 Service Hours (Prime Power) | |
| Cooling System Coolant Sample (Level 2) | Test | 500 hr | First service — Initial 500 Hours for new, refilled and converted systems | |
| Engine Oil and Filter | Change | 1000 hr | Every 500 Service Hours - standard sump; deep sump every 1000 hours | |
| Cooling System Coolant Analysis (Level II) | Other | 1000 hr | Every 1000 Service Hours; Obtain | |
| Cooling System Coolant Sample (Level 2) | Other | 1000 hr | 12 mo | First service — Obtain; Every 1000 Service Hours |
| Engine | Clean | 1000 hr | Every 1000 Service Hours | |
| Engine Crankcase Breather | Clean | 1000 hr | Every 1000 Service Hours |
Extracted from the manufacturer documentation linked to this model. Values are copied as printed; confirm against your unit's manual and serial number.
Service specifications
60| Type | Item | Value | Unit | Condition |
|---|---|---|---|---|
| Clearance | Air shutoff damper plunger distance A (minimum) | 18.3 | mm | 0.72 inch; replace plunger if less |
| Clearance | Air shutoff damper plunger distance A (replace if less than) | 18.3 | mm | |
| Clearance | Coolant level below bottom of filler pipe | 13 | mm | no sight gauge |
| Clearance | Coolant level below filler pipe bottom (no sight gauge) | 13 | mm (0.5 in) | |
| Clearance | Crankshaft end play | .178 to .635 | mm (0.0070 to 0.0250 inch) | measured with dial indicator |
| Clearance | Crankshaft end play after assembly | 0.178 to 0.635 | mm (0.0070 to 0.0250 inch) | after assembly |
| Clearance | Crankshaft vibration damper plunger - minimum wear dimension A | 18.3 | mm (0.72 in) | |
| Clearance | End play at heat sink after assembly | 0.076 to 0.635 | mm (0.0030 to 0.0250 inch) | after assembly |
| Clearance | Gap at 3, 6, 9, 12 o'clock positions | 0.03 to 0.13 | mm (0.001 to 0.005 inch) | between |
| Clearance | Gap between generator and flywheel housing at locations (E), (F), (G), (H) | >0.03 and <0.13 | mm (0.001 inch to 0.005 inch) | more than 0.03 mm and less than 0.13 mm |
| Clearance | Generator forward offset from midpoint of end play | + 0.50 | mm (+ 0.0200 inch) | while generator supported by crane |
| Clearance | Rotor end play | 3.81 to 7.62 | mm (.150 to .300 inch) | approximately |
| Clearance | Shim thickness divisor for number of shims | 0.8 | mm (0.03 inch) | divide Letter L by this value |
| Clearance | Speed/timing sensor sliphead extension | 4 | mm | minimum |
| Clearance | Support deflection during bolt tightening | 0.13 | mm (0.005 inch) | maximum allowed movement |
| Gap | Air shutoff damper plunger distance A (replace if less) | 18.3 | mm | |
| Gap | Coolant level below bottom of filler pipe (no sight gauge) | within 13 | mm (.5 inch) | |
| Other | Air cleaner element cleaning limit | six times | replace at least once per year regardless | |
| Other | Air starting motor lubricator oil release rate | two drops per 30 seconds | constant rate of air flow | |
| Other | Altitude capability without derate | 1525 | m | |
| Other | Altitude capability without derate | 800 | m | |
| Other | Coolant Sample (Level 1) interval for Cat DEAC | 250 | hours | |
| Other | Cooling system cleaner amount (heavy deposits) | 0.5 | L per 3.8 to 7.6 L capacity | 1 pint per 1 to 2 US gal |
| Other | Cooling system cleaner amount (normal deposits) | 0.5 | L per 15 L capacity | 1 pint per 4 US gal |
| Other | Cooling system cleaner dosage - heavy deposits or plugging | 0.5 L per 3.8 to 7.6 L | (1 pint per 1 to 2 US gal) | |
| Other | Cooling system cleaner dosage - normal | 0.5 L per 15 L | (1 pint per 4 US gal) | |
| Other | Cooling system cleaning duration (heavy deposits) | 90 | minutes | minimum, coolant at least 82 C (180 F) |
| Other | Cooling system cleaning duration (normal deposits) | 30 | minutes | minimum, coolant at least 82 C (180 F) |
| Other | Cooling system fill rate | 19 | L/min | maximum |
| Other | Cooling system fill rate | no faster than 19 | L (5 US gal) per minute | to avoid air locks |
| Other | Cooling system fill rate maximum | 19 | L/min | |
| Other | Crankshaft vibration damper max temperature | 93 | °C (200°F) | during operation, infrared thermometer check |
| Other | Crankshaft vibration damper without sampling port - max life | 20000 | hours | |
| Other | Damper fluid viscosity degradation limit | 20 | percent | majority of applications |
| Other | Damper fluid viscosity degradation limit (Hasse & Wrede) | 20 | percent | majority of applications |
| Other | Damper operating hours before rebuild/replace (damper without sampling port) | 20000 | hours | |
| Other | Damper without sampling port - rebuild/replace interval | 20000 | hours | or at major overhaul |
| Other | Exercise under full load | 1 | hour | ToCI quarterly |
| Other | Fast Acting Cooling System Cleaner amount | 0.5 L per 15 L | L | cooling system capacity, normal deposits |
| Other | Fast Acting Cooling System Cleaner amount | 0.5 L per 3.8 to 7.6 L | L | cooling system capacity, heavy deposits |
| Other | Fuel (secondary) filter tightening after gasket contacts base | one full turn | by hand, do not overtighten | |
| Other | Full load test duration | 4 | hours | Once per year |
| 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 | Hydrosolv cleaner concentration | 2 to 5 | percent | temperatures up to 93 C (200 F) |
| Other | Load bank data recording interval | 15 | minutes | During load bank test |
| Other | Load bank test load level | 80 | % of generator nameplate capacity | 4-hour resistive load bank test |
| Other | Load bank test profile | 2 hours at 50%, 1 hour at 75%, 1 hour at 100% | Annual four (4) hour load bank test | |
| Other | Major Overhaul interval (fuel consumption basis) | 1575000 | L (416,070 US gal) | at approximately 60 percent load factor, 3512B engines |
| Other | Max cooling system fill rate (avoid air locks) | 19 | L per minute (5 US gal per minute) | |
| Other | Max supplemental coolant additive (SCA) concentration - coolant/antifreeze and SCA | 6 | percent | |
| Other | Max supplemental coolant additive (SCA) concentration - water and SCA | 8 | percent | |
| Other | Maximum air pressure at nozzle for cleaning purposes | 205 | kPa | 30 psi |
| Other | New drive belt tension recheck after operation | 30 | minutes | rated rpm |
| 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 | Speed/timing sensor sliphead tension force | 22 | N | minimum; to push in sliphead from the extended position |
| Other | Stall Torque Ratio (TH55-E70) | 2.23 | ||
| Other | Stall Torque Ratio (TH55-E90) | 2.23 |
Extracted from the manufacturer documentation linked to this model. Values are copied as printed; confirm against your unit's manual and serial number.
Recommended fluids
| Fluid | Grade | Standard | Ambient | Capacity | Notes |
|---|---|---|---|---|---|
| Coolant | Cat DEAC | Diesel; 3,000 Service Hours or Three Years; annual S·O·SSM Level 2 coolant sampling and analysis | |||
| Coolant | Cat DEAC (Diesel Engine Antifreeze/Coolant) | Conventional coolant; SCA required; see SEBU6251 | |||
| Coolant | Cat DEAC or Cat ELC (Extended Life Coolant) | Caterpillar EC-1 | 50/50 mixture recommended, ELC requires only clean water flush | ||
| Coolant | Cat ELC | Diesel; 12,000 Service Hours or Six Years; add Cat ELC Extender at 6,000 service hours or one half of service life; annual S·O·SSM Level 2 coolant sampling and analysis | |||
| Coolant | Cat ELC (Extended Life Coolant) | Add Cat ELC Extender once; do not use conventional SCA with Cat ELC | |||
| Coolant | Cat ELC Extender | Add once; use only with Cat ELC | |||
| Coolant | Cat NGEC | Natural Gas; 16,000 Service Hours or Three Years; use interval that occurs first | |||
| Coolant | Clean water | Use only clean water to flush the cooling system when Extended Life Coolant (ELC) is drained and replaced | |||
| Coolant | Commercial long life / heavy-duty coolant meeting Caterpillar EC-1 | Caterpillar Engine Coolant Specification -1 (EC-1) | Obtain Level 1 coolant sample | ||
| Coolant | Commercial long life coolant meeting Caterpillar EC-1 | Caterpillar Engine Coolant Specification -1 (EC-1) | |||
| Coolant | DEAC (conventional coolant/antifreeze) | Requires Supplemental Coolant Additive (SCA); do not exceed 6 percent SCA concentration with coolant/antifreeze, 8 percent with water and SCA | |||
| Coolant | Extended Life Coolant (ELC) | Caterpillar ELC | Requires only one addition of Extender; fill no faster than 19 L (5 US gal) per minute | ||
| Coolant | Supplemental Coolant Additive (SCA) | Max 6 percent with conventional coolant; max 8 percent with water and SCA | |||
| Engine oil | EPA 2D 89.330-96 (fuel reference, Diesel <6.6 L, density 0,845-0,850 kg/L a 15 °C) | Reference condition only, not a lubricant recommendation | |||
| Engine oil | Cat NGEO | Natural Gas | |||
| Engine oil | air tool oil | below 0°C | Air starting motor lubricator; temperatures below 0 C (32 F) | ||
| Engine oil | low sulfated ash oil | Required for U.S. EPA Tier 4 Final, EU Stage IV engines. | |||
| Engine oil | meeting manufacturer's specs | Add crankcase oil (grade meeting manufacturer's specs) to correct level (SCI) | |||
| Engine oil | Cat Arctic DEO SYN SAE 0W-30 | -40°C to 30°C | Engine Crankcase; Industrial Engines | ||
| Engine oil | Cat DEO SYN SAE 5W-40 | -30°C to 50°C | Engine Crankcase; Industrial Engines | ||
| Engine oil | Cat DEO SAE 10W-30 | -18°C to 40°C | Engine Crankcase; Industrial Engines | ||
| Engine oil | Cat DEO SAE 15W-40 | -9°C to 50°C | Engine Crankcase; Industrial Engines | ||
| Engine oil | 10W (nondetergent) | above 0°C | Air starting motor lubricator bowl oil for temperatures greater than 0°C (32°F) | ||
| Engine oil | nondetergent SAE 10W | above 0°C | Air starting motor lubricator; temperatures greater than 0 C (32 F) | ||
| Fuel | Ultra Low Sulfur Diesel (ULSD) | Contains less than or equal to 15 parts per million sulfur (mg/kg); required for U.S. EPA Tier 4 Final, EU Stage IV engines. B20 biodiesel capability available. | |||
| Fuel | 35° API gravity at 60°F (16°C) | LHV 18,390 Btu/lb (42 780 kJ/kg) | Fuel at 85°F (29°C) weighing 7.001 lbs/U.S. gal (838.9 g/liter) | ||
| 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 fuel | 3600 engines designed for 80 000 hours on No. 2 fuel; ratings based on API gravity of 35 at 15 C (60 F), LHV of 42 780 kJ/kg used at 29 C (84 F) with a density of 838.9 g/L | |||
| 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.
Procedures
12Alignment Of Electric Sets With Supports At The Flywheel Housing / Installation Of A New Generator Or Flexible Plates adjustment
Tools: crane, dial indicator, shims, torque wrench
- Loosen all bolts connecting base to foundation; loosen all bolts fastening engine supports and generator supports to base.
- Ensure enough clearance between bolts and bolt holes in base, engine supports, generator supports at all locations.
- Check clearance between base and foundation at all mounting locations; use shims to prevent deflection; tighten base-to-foundation bolts to final torque.
- While generator supported by crane, loosen all bolts (2) fastening generator to flywheel housing; tighten alternate bolts to final torque; check clearance between base and engine and generator support
- Tighten all bolts fastening engine supports and generator supports to base to half of final torque; loosen all bolts (2); measure gap between generator and flywheel housing; ensure bolts centered in c
- Gaps at (E), (F), (G), (H) should be more than 0.03 mm (0.001 inch) and less than 0.13 mm (0.005 inch); adjust shims or move rear of generator right or left.
- After shim correction, tighten generator support bolts to half of final torque 450 N-m (332 Ib ft); check gaps; repeat until 0.13 mm (0.005 inch) or less; begin with Step 5.
- Install dial indicator on base with tip next to support mounting bolt (4); put tip on support (3); check while tightening bolt to final torque; if indicator moves more than 0.13 mm (0.005 inch), insta
Alignment Of Electric Sets Without Supports At The Flywheel Housing adjustment
Tools: shims, torque wrench
- Loosen all bolts connecting base to foundation; loosen all bolts fastening generator supports and engine supports to base.
- Ensure clearance between bolts and bolt holes in base, engine supports, generator supports at all locations.
- Check clearance between base and foundation at all mounting locations; use shims to prevent base deflection; tighten base-to-foundation bolts to final torque.
- Check clearance between base and engine, base and engine supports, base and generator supports over entire length; use shims to prevent support deflection; tighten all mounting bolts to final torque.
Belts - Adjusting the Alternator Belt adjustment
- Remove the drive belt guard.
- Loosen mounting bolt (1), adjusting nuts (2) and mounting bolt (3).
- Turn adjusting nuts (2) to increase or decrease drive belt tension.
- Tighten adjusting nuts (2), mounting bolt (3), and mounting bolt (1).
- Reinstall the drive belt guard.
- If new belts installed, recheck tension after 30 minutes at rated rpm.
Belts - Inspect/Adjust/Replace adjustment
⚠ Slippage of loose belts can reduce efficiency of driven components
⚠ Too tight belts place unnecessary stress on components
- Remove the drive belt guard.
- Loosen mounting bolt, adjusting nuts and mounting bolt.
- Turn adjusting nuts to increase or decrease drive belt tension.
- Tighten adjusting nuts and both mounting bolts to proper torque.
- Reinstall the drive belt guard.
- If new drive belts are installed, recheck tension after 30 minutes.
Engine Valve Lash - Inspect/Adjust adjustment
⚠ Ensure engine cannot be started during maintenance
⚠ Allow engine to cool before measuring/adjusting valve lash
- Refer to Systems Operation/Testing and Adjusting Manual, Valve Lash and Valve Bridge Adjustment for complete procedure.
- Perform initial adjustment on new, rebuilt, or remanufactured engines due to valve train wear/seating.
Fuel Injector - Inspect/Adjust adjustment
⚠ Damage to cylinder block can result if timing pins are not removed before turning crankshaft
- Correctly time camshafts with crankshaft before adjusting fuel injector lash.
- Remove timing pins from camshafts before turning crankshaft.
- Inspect and adjust lash for the fuel injector per Testing And Adjusting, Fuel Injector Adjustment, when engine valve lash is inspected.
Rechecking The Alignment adjustment
Tools: torque wrench, shims
- Loosen the sixteen close coupled adapter bolts (2); visually ensure they are centered in clearance holes.
- Check gaps at 3, 6, 9, and 12 o'clock positions; use 2, 4, 8, and 10 o'clock if 12 and 6 are inaccessible.
- If gaps are between 0.03 mm (0.001 inch) and 0.13 mm (0.005 inch), tighten all bolts; alignment check complete. If not, loosen bolts fastening generator to base frame; adjust shims; move rear of gener
- After adjustment, tighten generator mounting bolts to one half of standard torque 450 N-m (332 lb ft); repeat procedure starting with Step 1.
Air Shutoff - Test diagnostic
⚠ Do not start the engine during the test
⚠ Ensure the engine control is in the OFF position
- Ensure both air shutoff gates are latched OPEN and both switches connected.
- With power ON, activate EMERGENCY STOP; both gates should close.
- Latch only the right side gate; power ON; right gate should close.
- Latch only the left side gate; power ON; left gate should close.
- Reset both air shutoffs and operate the engine normally.
Air Shutoff - Test (ADEM II Engine Control Modules) diagnostic
⚠ Check the wiring for the air shutoff switches, and for the solenoids
- Do not start the engine; ensure engine control is OFF.
- Verify both air shutoff gates latched OPEN and switches connected.
- Turn panel power ON; gates should remain open.
- Activate EMERGENCY STOP; both gates should close.
- Reset; latch only right gate; power ON; right gate should close.
- Latch only left gate; power ON; left gate should close.
- Operate engine normally; ensure gates remain latched.
Generator Winding Insulation - Test diagnostic
⚠ High voltage can cause electrocution. Discharge instrument leads and generator windings.
Tools: 300-8648 Insulation Testing Gp
- Take the generator out of service.
- Visually inspect generator for moisture. If moisture exists, dry the unit first.
- Inspect installation. Determine equipment that will be tested.
- Discharge capacitance of the windings. Disconnect 'T0' from ground.
- Disconnect sensing lead wires for regulator and PT leads of load share module.
- Connect insulation tester Black lead to ground; RED lead to 'T0'.
- Set voltage to rated voltage. Apply voltage; observe readings at 30 and 60 seconds.
- Record 60 second reading (correct for temperature), temperature, and humidity.
Overhaul Considerations diagnostic
- Use total fuel consumption as the most important factor for estimating the overhaul interval.
- Estimate the hours until overhaul using the equation H = F/R.
- If actual fuel consumption records are not available, estimate the average percent of load and use the engine spec sheet.
- Monitor oil consumption; when it has risen to three times the original rate, schedule an engine overhaul.
- Monitor noise, vibration, oil consumption, and crankcase blowby.
- Consult your Caterpillar dealer about scheduling a major overhaul.
Installation Of The Generator For Generator Sets That Are Equipped With A 3500 Engine installation
⚠ Damage to engine and generator can result if electric set is operated with a plate assembly that does not have proper clearance.
⚠ If N or O is less than initial A, disassemble and check coupling plate for bowing; replace if bowed.
Tools: dial indicator, straight edge, magnetic bases, crane, torque wrench, 17 5N-4478 Plates
- Ensure generator is disengaged from engine; clean generator support and base contact surfaces; remove protective material from flywheel pilot bearing bore and coupling contact surface.
- Remove two engine side covers; rotate engine until no. 1 crankshaft throw is perpendicular; measure crankshaft end play with dial indicator; record as A and divide by two for B.
- With crankshaft at extreme forward position, measure distance from straight edge to flywheel housing mounting surface (C) and flywheel pilot surface (D); subtract D from C for E.
- Remove coupling bolts and washers; remove plates, shims, and exhaust fan; lift rotor; locate rotor so air gap equal; move rotor to extreme rear.
- Place dial indicator on vertical surface of heat sink at rear of rotor shaft; measure rotor end play (approximately 3.81 to 7.62 mm); record F and divide by two for G.
- Move rotor to extreme rear; position straight edge across mounting ring diameter; measure distance to mounting ring surface (H) and hub mounting surface (I); subtract H from I for J.
- Bolt a standard set of 17 5N-4478 Plates together; measure thickness in two locations along contour; average as K.
- Determine number of shims: subtract B, E, G, K from J for L; divide L by 0.8 mm (0.03 inch) for M; round up.
- Put coupling plate in flywheel bore; check clearance between coupling plate outside diameter and flywheel bore inside diameter.
- Install coupling plate assembly, bolts (6) and calculated shims; tighten bolts (5) in 180 degree intervals in three stages to 525 + 25 N-m (390 + 20 lb ft).
- Install guide bolts in flywheel; put generator on engine; install bolts (10); tighten to 100 N-m (75 lb ft) in pairs at 180 degree intervals in three stages.
- While crane supports generator, place dial indicator on heat sink vertical surface; push generator forward within + 0.50 mm (+ 0.0200 inch) of midpoint of end play.
- Install fan mounting bolts (11) into flywheel; tighten to 200 N-m (150 Ib ft) in pairs at 180 degree intervals in three stages.
- Place dial indicators on no. 1 crankshaft throw and heat sink; push crankshaft forward; check crankshaft end play 0.178 to 0.635 mm and heat sink end play 0.076 to 0.635 mm; record N and O.
- If N or O is less than initial A, disassemble; check coupling plate for bowing; replace if bowed; check calculations; install generator and repeat steps 13 and 15.
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 |
|---|---|---|---|---|
| 600 | 3 | wye (10 wire) | 10 wire | Brushless SR4B generator; 0.7 pf; voltage regulator optional; space heater and 100 ohm platinum temperature detectors standard |
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 is the power rating of the Caterpillar 3512?
The Caterpillar 3512 is rated 600 kW standby (1250.0 kVA).
What engine does the Caterpillar 3512 use?
The Caterpillar 3512 is powered by the Caterpillar 3512 D1 engine.
Is the Caterpillar 3512 diesel or gas?
The Caterpillar 3512 runs on diesel.
What is the cooling system capacity of the Caterpillar 3512?
The Caterpillar 3512 cooling system holds 244 liters (64.5 US gallons) for the radiator system including the engine, per the manufacturer specification sheet.
What is the continuous rating of the Caterpillar 3512?
The Caterpillar 3512 is rated 1000 kW prime (1150 kVA), against 600 kW standby.
How much does the Caterpillar 3512 weigh?
The Caterpillar 3512 has a dry weight of 5736 kg (12645 lb).
What voltages is the Caterpillar 3512 available in?
The Caterpillar 3512 is offered in 600 V, 3 phase-phase.
Which alternator is fitted to the Caterpillar 3512?
The Caterpillar 3512 uses a SR4 alternator.
What oil filter does the Caterpillar 3512 use?
The Caterpillar 3512 uses oil filter part number 1R0719. Equivalents: FLEETGUARD HF6097, BALDWIN PT189, CATERPILLAR 1M9150.
Which fuel filter part number does the Caterpillar 3512 take?
The Caterpillar 3512 uses fuel filter part number 1R0750.
What air filter does the Caterpillar 3512 use?
The Caterpillar 3512 uses air filter part number 8N6309.
Troubleshooting
6Symptoms & remedies
| Symptom | Remedy |
|---|---|
| Warning tag attached to the engine start switch or controls | Do NOT start the engine or move the controls. Consult with the person that attached the warning tag before starting. |
| Engine exhaust in an enclosed area | Start the engine and operate it in a well ventilated area. Vent the engine exhaust to the outside if started in an enclosed area. |
| Engine overheating or accelerated wear | Stop the engine according to the procedure described in the Operation and Maintenance Manual, 'Engine Stopping' topic (Operation Section). Do not use the Emergency Stop Button for normal stopping. Correct any problem that caused an emergency stop before restarting. |
| Loose or frayed electrical wires | Check daily and tighten loose wires, repair frayed wires before starting the engine. See specific starting instructions in the Operation and Maintenance Manual. |
| Improper grounding of the engine electrical system | Proper grounding is necessary for optimum performance and reliability. Use an engine-to-frame ground strap with a direct path to the battery. Ensure all grounds are tight and free of corrosion. |
| Engine shutdown due to certain conditions | The engine may shut down if it experiences: Engine overspeed, high aftercooler coolant temperature, high jacket water temperature, high crankcase pressure, or low engine oil pressure. Except for an overspeed shutdown, the monitoring system can be overridden. |
Fault codes and symptom→remedy steps extracted from this model’s service/owner documentation; verify against the official manual before servicing.
Repair guides
42- Actuator Control Linkage - Lubricate
- Aftercooler Core - Inspect/Clean
- Aftercooler Core - Inspect/Clean
- Air Shutoff - Test
- Air Shutoff - Test (ADEM II Engine Control Modules)
- Air Shutoff - Test (Engines with ADEM II ECM)
- Air Starting Motor Lubricator Bowl - Clean
- Air Starting Motor Lubricator Oil Level - Check
- Batteries - Replace
- Batteries - Replace
- Battery - Replace
- Battery Electrolyte Level - Check
- Belts - Adjusting the Alternator Belt
- Cooling System Coolant (DEAC) - Change
- Cooling System Coolant (ELC) - Change
- Cooling System Coolant - Change
- Cooling System Coolant Level - Check
- Engine Air Cleaner Element (Dual Element) - Clean/Replace
- Engine Air Cleaner Element (Single Element) - Clean/Replace
- Engine Air Cleaner Element (Single Element) - Inspect/Replace
Step-by-step procedures compiled from the Caterpillar service manual for this model.
Parts
49| Part # | Description | Qty | System | |
|---|---|---|---|---|
| 10R9951 | Head Gaskets | 1 | Gasket | Amazon eBay |
| 113-8432 | Front seal | Seal | Amazon eBay $128.48 | |
| 133-5673 | Fuel/Water Separator | 1 | Fuel filter | Amazon eBay $19.99 eBay $19.99 NAPA $70.35 KuduParts $19.00 FridayParts $20.99 |
| 141-7116 | V-belt | 1 | Belt | eBay $31.99 NAPA $16.79 FridayParts $22.60 |
| 1744947 | Aftercooler and Lines Gaskets | 1 | Gasket | Amazon eBay |
| 1R-0716 | Engine Oil | 1 | Oil filter | Amazon eBay $44.90 eBay $44.90 NAPA $33.79 NAPA $33.79 KuduParts $80.00 FridayParts $81.99 |
| 1R-0749 | Fuel Secondary - ADV | 1 | Fuel filter | Amazon Amazon eBay $135.88 eBay $135.88 NAPA $28.51 NAPA $28.51 KuduParts $17.00 FridayParts $47.50 |
| 1R-0755 | High Efficiency Fuel Filter | 1 | Filter | Amazon eBay $34.99 eBay $96.90 NAPA $82.67 NAPA $82.67 KuduParts $54.00 FridayParts $71.99 |
| 1R-1808 | Engine Oil - ADV | 1 | Oil filter | Amazon eBay $141.00 eBay $59.99 NAPA $45.70 NAPA $45.70 KuduParts $80.00 FridayParts $81.99 |
| 1R0719 | Filter oil | Oil filter | eBay $20.00 FridayParts $31.32 KuduParts $58.00 | |
| 1R0726 | Filter oil | Oil filter | eBay $39.99 KuduParts $17.00 FridayParts $19.48 | |
| 1R0741 | Filter hydraulic | Hydraulic filter | eBay $22.00 NAPA $25.37 | |
| 1R0750 | Filter fuel | Fuel filter | Amazon eBay $33.80 eBay $33.80 NAPA $21.82 NAPA $21.82 KuduParts $17.00 FridayParts $29.50 | |
| 1R0755 | Filter fuel | Fuel filter | Amazon eBay $34.99 eBay $96.90 NAPA $82.67 NAPA $82.67 KuduParts $54.00 FridayParts $71.99 | |
| 1R0756 | Filter fuel | Fuel filter | Amazon eBay $18.99 eBay $18.99 NAPA $34.69 KuduParts $33.00 FridayParts $34.98 | |
| 1U-5490 | Hydrosolv 4165 liquid cleaner, 19 L (5 US gallon) | Fluid | Amazon eBay | |
| 1U-5492 | Hydrosolv 100 Liquid Cleaner, 19 L (5 US gal) | Fluid | eBay | |
| 1U-5718 | Vacuum Pump | 1 | Pump | Amazon eBay $87.99 |
| 1U-8804 | Hydrosolv 100 Liquid Cleaner, 4 L (1 US gal) | Fluid | eBay | |
| 1U-8812 | Hydrosolv 4165 Liquid Cleaner, 4 L (1 US gal) | Fluid | eBay | |
| 222-5152 | Water pump repair kit | Pump | eBay $239.99 | |
| 2322507 | Manifold Gaskets | 1 | Gasket | Amazon eBay |
| 2322521 | Turbocharger Gaskets | 1 | Gasket | Amazon eBay |
| 2322522 | Reman Injectors | 1 | Injector | Amazon eBay |
| 2342795 | Injector Seals/Gaskets | 1 | Gasket | Amazon eBay |
| 248-5513 | Thermostat | Thermostat | Amazon eBay $39.95 eBay $43.00 FridayParts $30.31 SinoCMP $59.00 | |
| 3S3875 | Filter fuel | Fuel filter | eBay $49.99 | |
| 4W3864 | Water pump seal | Seal | eBay $9.27 | |
| 5N-5561 | Silicone Lubricant | Fluid | Amazon eBay | |
| 8N6309 | Air filter outer | Air filter | eBay $89.68 NAPA $186.85 KuduParts $185.00 FridayParts $290.20 | |
| 8T-5571 | Hydrosolv 100 - 208 L (55 US gallon) | Fluid | eBay | |
| 8T-7570 | Hydrosolv 4165 - 208 L (55 US gallon) | Fluid | eBay | |
| 9G8010 | Switch | Sensor | eBay $39.00 FridayParts $16.90 | |
| 9S-8140 | Pressurizing Pump | Pump | Amazon eBay | |
| ESD5526 | Speed Controller | Speed controller | Amazon eBay | |
| 138-8440 | Component cleaner | Service part / kit | Amazon eBay | |
| 1440725 | Connecting rod | Service part / kit | Amazon eBay $630.00 | |
| 169-8373 | Fluid Sampling Bottle | 1 | Service part / kit | Amazon eBay $29.99 |
| 174-6854 | Hydrosolv 100 liquid cleaner, 19 L (5 US gallon) | Service part / kit | Amazon eBay NAPA $10.64 | |
| 1743191 | Reman Cylinder Heads | 1 | Service part / kit | Amazon eBay |
| 249-0437 | Oxidation Catalyst Assembly - Round | 1 | Service part / kit | Amazon eBay |
| 4C-9301 | Coolant Conditioner Test Kit | 1 | Service part / kit | Amazon eBay $30.00 |
| 5P-3413 | Pipe Sealant | 1 | Service part / kit | eBay $12.37 |
| 8T-5296 | Coolant Conditioner Test Kit | Service part / kit | Amazon eBay eBay | |
| 9S-3263 | Thread lock | 1 | Service part / kit | eBay $30.78 |
| 9S-4030 | Thread lock | Service part / kit | eBay | |
| LEDE4767 | ELECTRIC powerprofile ©2004 Caterpillar All Rights Reserved | Service part / kit | Amazon eBay | |
| PEHJ0271 | Cat® Emissions Upgrade Kits for Select 3500 Marine Engines | Service part / kit | Amazon eBay | |
| PEHJ0287 | Cat® Performance Upgrade Kits for Select 3508, 3512, and 3516 Marine Engines | 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 | 100% | 259.8 | 68.6 |
| Standby | 100% | 297.8 | 78.7 |
Source — consumption: Cat-3512-MUI-Spec-Sheet.
Available documents
Engine spec — 3512 Land Mechanical - LEHW0060-00 P3 (Caterpillar)Engine spec — 3512B Land Electric - LEHW0067-00 P2 (Caterpillar)Engine spec — 3512B+-+LEHW0055-00+P5 (Caterpillar)Engine spec — 3512B 1231bkW 1650bhp (Caterpillar)Engine spec — 3512 IND-A 761bkW (Caterpillar)Engine spec — 3512 IND-A 955bkW (Caterpillar)Engine spec — 3512 IND-C 1119bkW (Caterpillar)Engine spec — LECH3874-02 (Caterpillar)Engine spec — LECH3874-07 (Caterpillar)Engine spec — LEHW0124-00+P3 (Caterpillar)Engine spec — LFDH5502-01 HR (Caterpillar)Engine spec — lecw2462-06 (Caterpillar)Engine spec — lehh0362 (Caterpillar)Engine spec — lehh0560 (Caterpillar)Engine spec — lehh5392 (Caterpillar)Engine spec — lehh6390 (Caterpillar)Engine spec — lehh8100 (Caterpillar)Engine spec — lehm0286 (Caterpillar)Engine spec — lehm0287 (Caterpillar)Engine spec — lehm0290 (Caterpillar)Engine spec — lehm0309 (Caterpillar)Engine spec — lfhh5447 (Caterpillar)Engine spec — lfhh5448 (Caterpillar)Engine spec — lfhh6261 (Caterpillar)Engine spec — lphh8100 (Caterpillar)Engine spec — lshh6258 (Caterpillar)Engine spec — lshh6261 (Caterpillar)Engine spec — lshh8100 (Caterpillar)Spec sheet — Cat-3512-MUI-Spec-Sheet (Caterpillar)Spec sheet — LEHW0101-01 (Caterpillar)Spec sheet — epnsum00 (Caterpillar)Spec sheet — lehm0288 (Caterpillar)Spec sheet — lehm0307 (Caterpillar)Spec sheet — lehm0308 (Caterpillar)Spec sheet — lehw6166 (Caterpillar)Spec sheet — lehw6167 (Caterpillar)Spec sheet — lehw7469 (Caterpillar)Spec sheet — lehw7470 (Caterpillar)Spec sheet — lehw9192 (Caterpillar)Spec sheet — lehw9193 (Caterpillar)Operator's manual — SEBU7571-03 M (Caterpillar)Reference — Aug+2010+Engine+Selection+Guide (Caterpillar)Reference — Caterpillar-Oil-and-Gas-Ratings-Guide-2021-03 (Caterpillar)Reference — Final+Ratings+Guide LECW2462-15 9.8.11 (Caterpillar)Reference — Industrial rating guide (Caterpillar)Reference — LECW2462-25 1 oil gas (Caterpillar)Reference — LEDM3457-27 (Caterpillar)Reference — LEGH0002 (Caterpillar)Reference — Ratings Guide Port LPCW2462-15 final LR (Caterpillar)Reference — lehr0592 (Caterpillar)Owner's manual — 3508B+Industrial+Engines-Maintenance+Intervals (Caterpillar)Owner's manual — 3512+Industrial+Engine-Maintenance+Intervals (Caterpillar)Owner's manual — 3512B+Marine+Auxiliary+Engine-Maintenance+Intervals (Caterpillar)Owner's manual — SEBU7148-09 M (Caterpillar)Parts manual — Cat Marine Engine Selection Guide (Caterpillar)Parts manual — Caterpillar Engines (Caterpillar)Parts manual — KMP-Brand®Parts-Guide-Suitable-for-Caterpillar®By-Product (Caterpillar)Parts manual — LEXE7582-02 (Caterpillar)Parts manual — PEHJ0254 Reman Overhaul Kit8 (Caterpillar)Parts manual — lehw6165 (Caterpillar)Service manual — 3512B Engine-Maintenance Intervals (Caterpillar)Service manual — Alignment of Single Bearing Generators (Caterpillar)Service manual — OT906706 RC (Ohio Department of Administrative Services (DAS), General Services Division, Office of State Purchasing)Service manual — SEBU7147-05 M (Caterpillar)
This page was generated from the 64 manufacturer documents above by automated extraction; every figure shown is copied from one of them. How the data is compiled.