Key Product Introduction
This comprehensive CAT-3512 overhaul parts package includes all critical wear components, sealing elements, fasteners, and rotating assemblies required for a full engine rebuild—covering valve trains, crankshaft assemblies, piston systems, cooling circuits, fuel delivery modules, lubrication systems, and exhaust components. All parts are manufactured with high-grade alloy steels, heat-resistant rubbers, and multi-layer metal gaskets to withstand extreme operating pressures (up to 2200 PSI) and temperatures (-40°F to 500°F), matching OEM performance metrics for longevity and reliability.
Each part is labeled with a unique part number (cross-referenced to CAT OEM part codes) and standardized unit quantities, eliminating inventory gaps and ensuring full coverage for a complete overhaul. The indivisible lot structure guarantees compatibility across all interconnected engine systems, preventing mismatched components that cause catastrophic engine failure.
Functional Specifications & Performance Value
- Sealing System Performance: Multi-material O-rings and gaskets (rubber, paronite, metal-rubber composite) deliver zero-leak sealing for oil, fuel, coolant, and air circuits, reducing fluid loss by 99% compared to generic aftermarket parts.
- Rotating Component Durability: Forged crankshafts, camshafts, and piston assemblies resist thermal distortion and mechanical fatigue, supporting 8000+ hours of continuous heavy-duty operation before re-overhaul.
- Fastener & Hardware Integrity: Heat-treated bolts, screws, and washers maintain clamp load under vibration, preventing loosening in high-shock drilling and industrial environments.
- System Compatibility: Perfect fit for CAT-3512 (PTH) 2000-2010 gensets, reducing installation time by 30% versus mixed aftermarket parts and eliminating rework during overhaul.
Structural & Engineering Features
- Precision Machining: Critical moving parts (valve assemblies, crankshaft bearings, piston pins) undergo CNC precision machining and dynamic balancing, minimizing engine vibration and reducing wear on adjacent components.
- Material Grade Optimization: High-temperature resistant alloys for exhaust valves, wear-resistant castings for cylinder liners, and oil-resistant nitrile rubber for seals enhance chemical and thermal stability.
- Modular System Design: Parts are grouped by engine subsystem (valve train, lubrication, cooling, fuel, transmission) for streamlined overhaul workflow and easy inventory tracking.
- OEM Interchangeability: Direct drop-in replacement for CAT original parts, no modifications or machining required during installation.
Applicable Operating Conditions
- These CAT-3512 overhaul spare parts are engineered for harsh, heavy-duty industrial scenarios where reliable power is non-negotiable, including:
- Offshore and onshore drilling rigs (stationary and mobile power generation)
- Industrial backup power for manufacturing plants, refineries, and mining operations
- Remote power systems with limited maintenance access
- Continuous-duty genset operations (24/7 runtime) with high load factors
- Extreme environmental conditions: high dust, high humidity, temperature fluctuations, and high-vibration work sites
Professional Maintenance & Overhaul Best Practices
To maximize part lifespan and genset reliability, follow these industry-standard maintenance guidelines for CAT-3512 (PTH) 2000-2010 units:
- Pre-Installation Inspection: Verify part cleanliness, dimensional accuracy, and material integrity; discard any components with surface defects or damage to avoid premature failure.
- Torque Specification Adherence: Use calibrated torque tools to tighten fasteners to CAT factory torque values, preventing over-tightening (cracked components) or under-tightening (leaks/loosening).
- Fluid Compatibility: Use Caterpillar-approved engine oil, coolant, and fuel post-overhaul to preserve seal integrity and prevent chemical degradation of rubber components.
- Break-In Period: Run the genset at 50-70% load for 8-10 hours post-overhaul to seat rings, bearings, and gaskets before full-load operation.
- Scheduled Inspections: Conduct leak checks, vibration testing, and part wear assessments every 1000 runtime hours to catch minor issues before major repairs are needed.
We supply the following spare parts:
| Spare parts for overhaul of diesel engines CAT-3512 (PTH) 2000-2010. (lot indivisible) | |||
| 725 | Valve assembly | 8F8858 | PC |
| 726 | Ring | 9F7707 | PC |
| 727 | Screw | 3580768 | PC |
| 728 | screw | 3J9196 | PC |
| 729 | Motor rod assembly | 4W6682 | PC |
| 730 | Engine valve train gasket (metal) | 7E3772 | PC |
| 731 | Engine valve pusher | 3467515 | PC |
| 732 | Spring | 4N4782 | PC |
| 733 | Crankshaft | 7C2377 | PC |
| 734 | Bolt | 8T7581 | PC |
| 735 | Transmission System O-Ring | 2J0157 | PC |
| 736 | Piston bearing | 1077330 | PC |
| 737 | Motor rod | 1440725 | PC |
| 738 | Clamp assembly | 1933282 | PC |
| 739 | Engine tube | 2045447 | PC |
| 740 | Engine piston pin retainer | 2531238 | PC |
| 741 | Engine porn ring assembly | 2236361 | PC |
| 742 | Engine porn ring | 1445695 | PC |
| 743 | Engine porn ring | 5096461 | PC |
| 744 | Engine piston pin assembly | 2638955 | PC |
| 745 | Engine piston assembly | 3145005 | PC |
| 746 | Oil supply system gasket (metal) | 6F4868 | PC |
| 747 | Oil Line O-ring (Rubber) | 2594600 | PC |
| 748 | Motor housing O-ring | 5P7818 | PC |
| 749 | Engine ring seal (rubber) | 5P8872 | PC |
| 750 | Oil pan O-ring (rubber) | 5V5101 | PC |
| 751 | Water pump O-ring (rubber) | 3103954 | PC |
| 752 | Oil pan gasket | 9L1480 | PC |
| 753 | Oil pan gasket (metal) | 7E2630 | PC |
| 754 | Flywheel housing gasket (rubber) | 7N3049 | PC |
| 755 | Screw | 0S1587 | PC |
| 756 | Bolt | 9H8260 | PC |
| 757 | Engine seal (rubber) | 6V0405 | PC |
| 758 | Washer | 7C3258 | PC |
| 759 | Motor shaft | 7C3260 | PC |
| 760 | Pump shaft assembly | 7N5239 | PC |
| 761 | Motor Drive Bushing | 1275400 | PC |
| 762 | Washer | 7N5246 | PC |
| 763 | Motor bushing | 1409597 | PC |
| 764 | Engine O-ring (rubber) | 2353546 | PC |
| 765 | Engine O-ring (rubber) | 2594598 | PC |
| 766 | Bolt | 4B3388 | PC |
| 767 | Engine O-ring (rubber) | 6V3348 | PC |
| 768 | Engine cover gasket (rubber) | 4973911 | PC |
| 769 | Bolt | 2B0947 | PC |
| 770 | Motor bearing | 4P5438 | PC |
| 771 | Motor shaft assembly | 4P5437 | PC |
| 772 | Motor plate | 1011365 | PC |
| 773 | Motor bearing | 1259751 | PC |
| 774 | Shaft | 1121552 | PC |
| 775 | Washer | 1011368 | PC |
| 776 | Screw | 1D4609 | PC |
| 777 | Bolt | 1241854 | PC |
| 778 | Engine seal (paronite) | 4200652 | PC |
| 779 | Engine seal (paronite) | 4200653 | PC |
| 780 | Intake valve seat | 1302607 | PC |
| 781 | Intake valve seat | 1302608 | PC |
| 782 | Engine pressure sensor ring seal (rubber) | 2147566 | PC |
| 783 | Cylinder head retainer | 2A4429 | PC |
| 784 | Engine cylinder valve guide | 1339306 | PC |
| 785 | Engine Cylinder Exhaust Valve | 4688825 | PC |
| 786 | Engine cylinder valve guide | 1976995 | PC |
| 787 | Cylinder head retaining ring | 1977055 | PC |
| 788 | Engine cylinder inlet valve | 4688824 | PC |
| 789 | Cylinder head spring | 2816157 | PC |
| 790 | Cylinder head spring | 1944902 | PC |
| 791 | Mechanism for turning valves | 3165978 | PC |
| 792 | Mechanism for turning valves | 3165979 | PC |
| 793 | Motor seal (metal) | 3165980 | PC |
| 794 | Engine cylinder washer | 3165981 | PC |
| 795 | Transmission system ring seal | 2147568 | PC |
| 796 | Engine O-ring (rubber) | 7X4805 | PC |
| 797 | Engine gasket (paronite) | 1445692 | PC |
| 798 | Ring | 5F9657 | PC |
| 799 | Engine ring seal (rubber) | 5P8210 | PC |
| 800 | Crankshaft bearing | 1161359 | PC |
| 801 | Engine seal (rubber) | 8T2929 | PC |
| 802 | Cylinder block liner seal (rubber) | 5160827 | PC |
| 803 | Engine ring seal (rubber) | 8T2928 | PC |
| 804 | Cylinder liner | 5238663 | PC |
| 805 | Engine seal (rubber) | 7N2046 | PC |
| 806 | Crankshaft cover seal (rubber) | 2720758 | PC |
| 807 | Water line seal (rubber) | 2720759 | PC |
| 808 | Laying the water supply line (paronite) | 7N4945 | PC |
| 809 | Crankshaft seal (metal-rubber) | 5697729 | PC |
| 810 | Crankshaft seal (metal-rubber) | 5697728 | PC |
| 811 | Crankshaft plate | 7S6209 | PC |
| 812 | Crankshaft bearing | 1496031 | PC |
| 813 | Camshaft assembly | 7E5322 | PC |
| 814 | Camshaft assembly | 7E6818 | PC |
| 815 | Engine camshaft assembly | 1332966 | PC |
| 816 | Bolt | 5P0076 | PC |
| 817 | Engine camshaft assembly | 7E6815 | PC |
| 818 | Radiator core assembly with seals | 7W5455 | kit |
| 819 | Laying the water supply line (paronite) | 2301072 | PC |
| 820 | Cooling system ring seal (rubber) | 6V1454 | PC |
| 821 | Radiator ring seal (rubber) | 8C5209 | PC |
| 822 | Radiator gasket | 1W1253 | PC |
| 823 | Cooling system gasket | 8N2410 | PC |
| 824 | Water supply adapter | 8N2409 | PC |
| 825 | Radiator ring seal (rubber) | 7M9909 | PC |
| 826 | Cooling bushing | 1W5728 | PC |
| 827 | Air supply line ring seal | 6V5167 | PC |
| 828 | Sleeve ring seal (rubber) | 6V3319 | PC |
| 829 | Engine Secondary Cooler Gasket | 1W1251 | PC |
| 830 | Ring seal for air supply system (rubber) | 6V3917 | PC |
| 831 | Exhaust manifold gasket (paronite) | 7N5080 | PC |
| 832 | Air supply system routing | 7N5089 | PC |
| 833 | Air supply line installation | 5L3773 | PC |
| 834 | Screw | 0L1329 | PC |
| 835 | screw | 2N2766 | PC |
| 836 | Exhaust pipe bolt | 5P2755 | PC |
| 837 | Bolt | 3B1915 | PC |
| 838 | Washer | 5M2894 | PC |
| 839 | Exhaust manifold gasket (paronite) | 7W8145 | PC |
| 840 | bracket | 8N8819 | PC |
| 841 | Transmission system turntable bolt assembly | 6N1717 | PC |
| 842 | Washer | 5P1076 | PC |
| 843 | bracket | 2543269 | PC |
| 844 | screw | 3E6916 | PC |
| 845 | Washer | 9L9132 | PC |
| 846 | Fuel supply system pipe plug | 8T6765 | PC |
| 847 | Turbocharger assembly | 1020290 | PC |
| 848 | Turbocharger gasket (paronite) | 1215736 | PC |
| 849 | Bolt | 2N2765 | PC |
| 850 | Elbow adapter | 1654190 | PC |
| 851 | Clamp | 1236979 | PC |
| 852 | Cooler water supply line (metal) | 247396 | PC |
| 853 | O-ring seal for oil supply line (rubber) | 1092332 | PC |
| 854 | Oil cooler core assembly | 4W4980 | PC |
| 855 | Cooling system pipe assembly | 8N1989 | PC |
| 856 | Engine ring seal (rubber) | 6V9027 | PC |
| 857 | Ring seal for water supply line (rubber) | 6V5066 | PC |
| 858 | Laying the water supply line (paronite) | 4N1320 | PC |
| 859 | Cooling system pipe assembly | 7C5230 | PC |
| 860 | Water supply line tube assembly | 8N6406 | PC |
| 861 | Hydraulic lift cylinder O-ring (rubber) | 5P6302 | PC |
| 862 | Water Line O-ring (Rubber) | 6V6809 | PC |
| 863 | Hydraulic system gasket (paronite) | 1S5772 | PC |
| 864 | Water line clamp | 8N3639 | PC |
| 865 | Oil pan ring | 8N3640 | PC |
| 866 | Laying the radiator water supply line (paronite) | 7N4932 | PC |
| 867 | Engine gasket (metal) | 4B8407 | PC |
| 868 | Temperature sensor seal (rubber) | 6V6609 | PC |
| 869 | Laying a water supply line (paronite) | 1228856 | PC |
| 870 | Laying the water supply line (metal-paronite) | 7N3368 | PC |
| 871 | Laying a water supply line (paronite) | 2432288 | PC |
| 872 | Cooling system gasket (rubber) | 1272176 | PC |
| 873 | Water supply system gasket (rubber) | 2415928 | PC |
| 874 | Ring seal for water supply system (rubber) | 6V9769 | PC |
| 875 | temperature sensor | 4W2683 | PC |
| 876 | Pressure sensor assembly | 1W5280 | PC |
| 877 | Pressure sensor assembly | 4W0506 | PC |
| 878 | Engine speed sensor | 1977348 | PC |
| 879 | Engine fan V-belt set (consists of 3 belts) | 9L1630 | PC |
| 880 | Crankshaft | 1286786 | PC |
| 881 | Sensor assembly | 4N4416 | PC |
| 882 | Temperature sensor seal (rubber) | 3S9643 | PC |
| 883 | temperature sensor | 2485513 | PC |
| 884 | Engine water temperature regulator gasket (paronite) | 7N4927 | PC |
| 885 | Laying the water supply line (paronite) | 4W3100 | PC |
| 886 | Laying the water supply line (paronite) | 7E6016 | PC |
| 887 | Water pump assembly | 4160610 | PC |
| 888 | Water pump cover | 8N6423 | PC |
| 889 | Motor O-ring | 5N6734 | PC |
| 890 | Water pump seal | 2714926 | PC |
| 891 | Engine O-ring (rubber) | 1H8278 | PC |
| 892 | Bolt | 6V3279 | PC |
| 893 | Fuel system adapter | 7N5358 | PC |
| 894 | Sleeve | 7N5352 | PC |
| 895 | Fuel pump assembly assembly | 7N5360 | PC |
| 896 | Fuel system rod assembly | 1N4679 | PC |
| 897 | screw | 2L9038 | PC |
| 898 | Cover assembly | 8N2004 | PC |
| 899 | Washer | 5P0537 | PC |
| 900 | Bolt | 7N5343 | PC |
| 901 | Fuel supply system gasket | 8N1996 | PC |
| 902 | Water pump O-ring (rubber) | 2385081 | PC |
| 903 | Engine O-ring (rubber) | 2385080 | PC |
| 904 | Fuel supply line pipe | 7C7677 | PC |
| 905 | Fuel supply line pipe | 7C7678 | PC |
| 906 | Fuel Line Valve | 7E3921 | PC |
| 907 | Fuel supply line ring seal (rubber) | 7N6806 | PC |
| 908 | Fuel system adapter | 7W2122 | PC |
| 909 | Speed sensor | 3181181 | PC |
| 910 | Bearing | 8L6376 | PC |
| 911 | Fuel pump gasket | 4W5369 | PC |
| 912 | Fuel pump seal assembly | 5N1190 | PC |
| 913 | Fuel system control unit adapter | 6V8955 | PC |
| 914 | screw | 6V8186 | PC |
| 915 | Fuel system rod assembly | 4W5062 | PC |
| 916 | screw | 5S0003 | PC |
| 917 | Fuel system O-ring (rubber) | 3J1907 | PC |
| 918 | Bolt | 0S1617 | PC |
| 919 | Pressure meter | 9X4276 | PC |
| 920 | Clamp | 1N4910 | PC |
| 921 | Bolt | 4F7226 | PC |
| 922 | Fuel injector assembly | 1113718 | PC |
| 923 | Transmission System Fuel Seal | 1N9696 | PC |
| 924 | Fuel pump coupling | 1N4636 | PC |
| 925 | Engine fuel pump assembly | 3137770 | PC |
| 926 | Bolt | 5L1761 | PC |
| 927 | Fuel system lip seal | 3K2593 | PC |
| 928 | Engine seal (rubber) | 2N3932 | PC |
| 929 | Oil pump assembly | 4P5638 | PC |
| 930 | Oil pump O-ring (rubber) | 2986387 | PC |
| 931 | O-ring seal for oil transfer system | 1367227 | PC |
| 932 | Oil supply system gasket | 2528374 | PC |
| 933 | Lubricant supply line installation | 1S4810 | PC |
| 934 | Transmission system gasket | 1S6595 | PC |
| 935 | Air supply line ring seal (rubber) | 5P9890 | PC |
| 936 | Air supply system O-ring (rubber) | 4477206 | PC |
| 937 | Oil supply system O-ring (rubber) | 2697885 | PC |
| 938 | Oil filter ring seal | 5P4892 | PC |
| 939 | Fuel system O-ring (rubber) | 5P5846 | PC |
| 940 | Oil Line O-ring (Rubber) | 2287097 | PC |
| 941 | Clamp | 6V0267 | PC |
| 942 | Clamp | 6V0268 | PC |
| 943 | Oil filter seal | 6V3908 | PC |
| 944 | Air supply line ring seal (rubber) | 6V5048 | PC |
| 945 | Spring | 2W1635 | PC |
| 946 | Valve assembly | 2W1969 | PC |
| 947 | Cylinder head gasket | 5917736 | PC |
| 948 | Cylinder head plate | 5197297 | PC |
| 949 | Engine Valve Bridge | 2657537 | PC |
| 950 | Engine Valve Bridge | 2657538 | PC |
| 951 | O-ring seal of the front engine casing (rubber) | 5P0840 | PC |
| 952 | Cooling system gasket assembly | 8N3248 | PC |
| 953 | Radiator cap | 6L8617 | PC |
| 954 | Tank | 7S4237 | PC |
| 955 | Tank | 7S4233 | PC |
| 956 | Radiator seal | 1606387 | PC |
| 957 | Radiator seal | 1606386 | PC |
| 958 | Radiator core | 7W9541 | PC |
| 959 | Fuel system assembly | 7E6633 | PC |
| 960 | Fastening | 4867515 | PC |
| 961 | Transmission system ring seal (rubber) | 5F3144 | PC |
| 962 | Roller fan bearing | 6Y7651 | PC |
| 963 | Washer | 5577607 | PC |
| 964 | Bearing cup | 6Y7652 | PC |
| 965 | Fan drive seal (rubber) | 1J4034 | PC |
| 966 | Engine water pump ring seal | 2M4453 | PC |
| 967 | Water line hose | 7S4343 | PC |
| 968 | Hose clamp | 8T4986 | PC |
| 969 | Water line hose | 7C4342 | PC |
| 970 | Hose clamp | 5P4868 | PC |
| 971 | Radiator tube | 7C4254 | PC |
| 972 | Ring | 3401591 | PC |
| 973 | O-ring | 2147568 | PC |
| 974 | Pump | 1720265 | PC |
| 975 | Pad | 5N3198 | PC |
| 976 | Valve | 1720269 | PC |
| 977 | Pad | 5N8227 | PC |
| 978 | Engine O-ring (rubber) | 6V8260 | PC |
| 979 | Fuel system control unit | 7W6722 | PC |
| 980 | Air valve gasket | 1W7391 | PC |
| 981 | Valve gear bearing | 1W4594 | PC |
Real-World Field Failure Repair Cases
Case 1: Valve Train Wear & Power Loss
A CAT-3512 (2005 model) used for drilling operations experienced 20% power drop and irregular exhaust emissions. Inspection revealed worn valve assemblies, broken valve springs, and damaged pushrods. Replacing the full valve train components (valve assemblies, springs, pushrods, gaskets) from this parts list restored full power output and eliminated exhaust irregularities within 12 hours of overhaul.
Case 2: Coolant & Oil Leakage (Seal Failure)
A 2008 CAT-3512 genset in a mining facility suffered persistent coolant and oil leaks, leading to frequent fluid top-offs and overheating risks. The issue stemmed from degraded rubber O-rings and gaskets across the cooling and lubrication systems. Installing the full set of system-specific seals and gaskets from this catalog eliminated all leaks and reduced maintenance downtime by 80%.
Case 3: Piston & Crankshaft Bearing Failure
A 2007 CAT-3512 unit experienced catastrophic crankshaft bearing wear and piston pin damage due to prolonged high-load operation. Replacing the crankshaft bearings, piston assemblies, piston pins, and connecting rods from this indivisible parts lot restored engine compression and eliminated abnormal engine noise, returning the genset to 24/7 continuous duty.
Frequently Asked Questions (FAQ)
| Question | Answer |
| Are these parts compatible with all CAT-3512 gensets, or only 2000-2010 PTH models? | These parts are exclusively designed for CAT-3512 (PTH) series gensets built 2000-2010, with exact OEM dimensional matching. They are not compatible with pre-2000 or post-2010 CAT-3512 variants, or non-PTH configurations. |
| Is the parts lot divisible, or must it be purchased as a full set? | This overhaul parts lot is indivisible to ensure full system compatibility, eliminate fitment errors, and provide a complete overhaul solution. Partial part purchases are not available for this catalog. |
| What is the material quality and durability guarantee for critical parts? | All components meet or exceed Caterpillar’s OEM material standards: critical rotating parts use forged alloy steel, seals use high-temperature oil-resistant rubber, and gaskets use multi-layer metal/paronite composites. Parts are engineered for 8000+ hours of heavy-duty runtime. |
Purchasing Guidance & Technical Value Proposition
For operators and maintenance teams responsible for CAT-3512 (PTH) 2000-2010 diesel gensets, this complete overhaul parts list is the definitive solution to reduce downtime, control repair costs, and restore factory-grade performance. Avoid the risks of generic aftermarket parts (incompatibility, short lifespan, frequent failures) and secure a fully vetted, system-matched parts package that serves as both a procurement standard and technical repair reference for full engine overhauls.
This parts inventory is engineered for professional overhaul technicians, industrial power managers, and drilling operations teams seeking reliable, high-quality components that align with industry maintenance standards. Secure this comprehensive CAT-3512 overhaul parts lot to streamline your next engine rebuild, minimize operational disruptions, and extend the service life of your critical power generation equipment.
