| ITEM | NAME/DESCRIPTION | PART NO. | BRAND |
| 51221 | CYLINDER HEAD & VALVE GROUP | 4L3872 | Caterpillar |
| 51222 | TERMINAL (Dark Blue and Dark Green Wire) | 4L3916 | Caterpillar |
| 51223 | 4l4096 | Caterpillar | |
| 51224 | TURBOCHARGER INSTALLATION GROUP | 4L4154 | Caterpillar |
| 51225 | SET SCREW | 4L4155 | Caterpillar |
| 51226 | water pump | 4L4197 | Caterpillar |
| 51227 | PLATE-PRESSURE | 4L4289 | Caterpillar |
| 51228 | RETAINER | 4L4296 | Caterpillar |
| 51229 | BEARING ASSEMBLY– OUTPUT | 4L4305 | Caterpillar |
| 51230 | BEARING ASSEMBLY– ASTERN SHAFT– REAR | 4L4306 | Caterpillar |
| 51231 | BEARING ASSEMBLY– IDLER | 4L4308 | Caterpillar |
| 51232 | MANIFOLD | 4L4311 | Caterpillar |
| 51233 | SHAFT ASSEM. | 4L4342 | Caterpillar |
| 51234 | STUD-TAPERLOCK | 4L4345 | Caterpillar |
| 51235 | SHAFT ASSEM. | 4L4351 | Caterpillar |
| 51236 | GASKET –TO OUTPUT FLANGE RETAINER | 4L4368 | Caterpillar |
| 51237 | BEARING (STANDARD) | 4L4647 | Caterpillar |
| 51238 | PLATE THRUST BEARING | 4L4653 | Caterpillar |
| 51239 | RADIATOR ASSEMBLY | 4L4673 | Caterpillar |
| 51240 | CORE ASSEM. | 4L4687 | Caterpillar |
| 51241 | GUARD ASSEM. | 4L4711 | Caterpillar |
| 51242 | SHAFT ASSEM. (11 teeth) | 4L5708 | Caterpillar |
| 51243 | PULLEY | 4L5727 | Caterpillar |
| 51244 | DRIVE GROUP-TACHOMETER | 4L5789 | Caterpillar |
| 51245 | CAMSHAFT | 4L5816 | Caterpillar |
| 51246 | AUXILIARY DRIVE GROUP | 4L5836 | Caterpillar |
| 51247 | VALVE-CONTROL | 4L5847 | Caterpillar |
| 51248 | GUIDE-SPRING | 4L5849 | Caterpillar |
| 51249 | WATER PUMP GROUP | 4L5868 | Caterpillar |
| 51250 | CABLE AS (0000-GA) | 4L6155 | Caterpillar |
| 51251 | IMPELLER ASSEM. | 4L6220 | Caterpillar |
| 51252 | ELBOW (WATER PUMP OUTLET) | 4L6235 | Caterpillar |
| 51253 | SUPPORT (Right Hand) | 4L6257 | Caterpillar |
| 51254 | HOOD ASSEM. | 4L6390 | Caterpillar |
| 51255 | CAPSCREW (3/8-16X21 IN GD8 HEX HD 4-ROLLER) | 4L6454 | Caterpillar |
| 51256 | BOLT-MIRROR TO OPEN ROPS | 4L6459 | Caterpillar |
| 51257 | GOVERNOR GROUP | 4L6480 | Caterpillar |
| 51258 | PUMP AS-OIL | 4L6649 | Caterpillar |
| 51259 | GASKET | 4L6706 | Caterpillar |
| 51260 | COVER ASSEM. | 4L6785 | Caterpillar |
| 51261 | GEAR ASSEM. (12 Teeth-Idler) | 4L6795 | Caterpillar |
| 51262 | GEAR ASSEM. (12 T. IDLER) | 4L6796 | Caterpillar |
| 51263 | STOP | 4L7052 | Caterpillar |
| 51264 | VALVE-PILOT | 4L7108 | Caterpillar |
| 51265 | CAPSCREW (SOC. HEAD 1/4-20X1 1/4 GD 8 Z) | 4L7124 | Caterpillar |
| 51266 | PUMP ASSEMBLY | 4L7221 | Caterpillar |
| 51267 | CUP-ROLLER BEARING | 4L7249 | Caterpillar |
| 51268 | CABLE ASSEM. | 4L7512 | Caterpillar |
| 51269 | oil cooler | 4L7581 | Caterpillar |
| 51270 | GASKET | 4L7636 | Caterpillar |
| 51271 | SEAL-O-RING (42.52MM ID) | 4L7711 | Caterpillar |
| 51272 | ROD AS-PUSH | 4L7820 | Caterpillar |
| 51273 | LOCK | 4L7823 | Caterpillar |
| 51274 | NECK | 4L7843 | Caterpillar |
| 51275 | GASKET | 4L7885 | Caterpillar |
| 51276 | GASKET (INLET MANIFOLD TO AIR SHUT-OFF HOUSING) | 4L7890 | Caterpillar |
| 51277 | TUBE (8.09″ LONG) | 4L7892 | Caterpillar |
| 51278 | GASKET | 4L7923 | Caterpillar |
| 51279 | CLAMP | 4L7932 | Caterpillar |
| 51280 | GASKET (INLET MANIFOLD TO CYLINDER HEAD) | 4L8097 | Caterpillar |
| 51281 | TUBE AS-OIL COOLER | 4L8116 | Caterpillar |
| 51282 | GASKET | 4L8121 | Caterpillar |
| 51283 | SAFETY CONTROL SHUT-OFF GROUP | 4L8129 | Caterpillar |
| 51284 | GASKET | 4L8149 | Caterpillar |
| 51285 | GASKET | 4L8162 | Caterpillar |
| 51286 | BREATHER ASSEM. | 4L8165 | Caterpillar |
| 51287 | GASKET-BREATHER | 4L8176 | Caterpillar |
| 51288 | PUMP AS-FUEL PRIMING (FUEL PRIMING PUMP ASSEMBLY) | 4L8232 | Caterpillar |
| 51289 | GOVERNOR CONVERSION GROUP | 4L8283 | Caterpillar |
| 51290 | GEAR (37 TEETH) | 4L8294 | Caterpillar |
| 51291 | WASHER-RETAINING | 4L8300 | Caterpillar |
| 51292 | BEARING ASSEMBLY– IDLER | 4L8308 | Caterpillar |
| 51293 | SEAL TO AFTERCOOLER ELBOW | 4L8337 | Caterpillar |
| 51294 | ADAPTER | 4L8545 | Caterpillar |
| 51295 | VALVE CHECK PRIMING PUMP TOP AND TEE FRONT | 4L8546 | Caterpillar |
| 51296 | GASKET | 4L8606 | Caterpillar |
| 51297 | BRACKET | 4L8716 | Caterpillar |
| 51298 | PIPE | 4L8734 | Caterpillar |
| 51299 | PUMP GROUP-WATER (FRESH WATER PUMP GROUP) | 4L8800 | Caterpillar |
| 51300 | GASKET | 4L8851 | Caterpillar |
| 51301 | PLATE-DRIVING (DRIVING) | 4L8854 | Caterpillar |
| 51302 | SEAL-LIP TYPE | 4L9021 | Caterpillar |
| 51303 | GEAR ASSEM. (24 teeth) | 4L9150 | Caterpillar |
| 51304 | MANIFOLD (EXHAUST) | 4L9151 | Caterpillar |
| 51305 | GEAR ASSEM. (24 teeth) | 4L9154 | Caterpillar |
| 51306 | SLEEVE | 4L9224 | Caterpillar |
| 51307 | RELAY ASSEM. | 4L9314 | Caterpillar |
| 51308 | HEX HEAD CAPSCREW, 3/8 NC x 1 1/2 in. (38 mm) | 4L9337 | Caterpillar |
| 51309 | SEAL WATER LINES TO OIL COOLER | 4L9564 | Caterpillar |
| 51310 | TANK | 4L9633 | Caterpillar |
| 51311 | SEAL-LIP TYPE (OUTPUT FLANGE) | 4L9822 | Caterpillar |
| 51312 | Seal lip typ | 4L9822R | Caterpillar |
| 51313 | BALL BEARING | 4L9825 | Caterpillar |
| 51314 | FILTER ELEMENT AS-AIR (PRIMARYCLEANER) | 4L9851 | Caterpillar |
| 51315 | FILTER ELEMENT AS-AIR (PRIMARY) | 4L9852 | Caterpillar |
| 51316 | ELEMENT SERVICE GROUP (WASHABLE) | 4L9853 | Caterpillar |
| 51317 | GASKET (retainer) | 4L9965 | Caterpillar |
| 51318 | COUPLING | 4L9966 | Caterpillar |
