Every Caterpillar engine or generator carries a unique serial number, and the prefix on the serial number plate provides key information about the unit’s model, application, and configuration. By understanding the serial number prefix, technicians, operators, and parts personnel can quickly identify the correct engine or generator model, verify arrangement numbers, and ensure proper maintenance or parts ordering.
The prefix often indicates the engine family, emission standard, and intended application, making it an essential tool for accurately tracing the history and specifications of a Cat power unit. This guide explains how to interpret the serial number prefix to reliably identify Caterpillar engines and generators.
Cat Engine SN Prefix 01T - 5ZA
| Prefix | Model | Prefix | Model |
|---|---|---|---|
| 01T | D3400 Industrial Engine | 3LW | 3456 Industrial Engine |
| 01Z | 3208 Marine Engine | 3LZ | 3176B Industrial Engine |
| 02B | 3304 Industrial Engine | 3MS | 3512 Generator Set |
| 02B | D330C Industrial Engine | 3NK | G3412 Gas Engine |
| 02Z | 3208 Truck Engine | 3NL | 3176B Industrial Engine |
| 03Z | 3208 Industrial Engine | 3NS | 3516B Generator Set |
| 04B | 3304 Industrial Engine | 3PC | 3204 Industrial Engine |
| 04B | D330C Industrial Engine | 3PS | 3508 Marine Engine |
| 04H | D13000 Industrial Engine | 3RC | G3516 Gas Engine |
| 05B | 3304 Marine Engine | 3RG | 3306B Generator Set |
| 05B | D330C Marine Engine | 3RJ | 3116 Truck Engine |
| 05E | D13000 Industrial Engine | 3RS | 3512 Marine Engine |
| 05V | D315 Marine Engine | 3SS | 3516 Marine Engine |
| 07Y | G3304 Gas Engine | 3TC | 3304 Generator Set |
| 09A | D333C Industrial Engine | 3TC | 3304B Generator Set |
| 10E | 3304 Industrial Engine | 3TR | 3126 Industrial Engine |
| 13E | 3304 Marine Engine | 3TS | 3508 Marine Engine |
| 13E | 3304B Marine Engine | 3WF | SR4 Generator |
| 15B | D386 Generator Set | 3WR | G3408C Industrial Engine |
| 17W | 7231 Marine Transmission | 3WS | 3512 Marine Engine |
| 1AJ | 3126B Truck Engine | 3XF | G3606 Gas Engine |
| 1BM | 3306B Industrial Engine | 3XS | 3516B Marine Engine |
| 1BW | 3126 Truck Engine | 3YF | 3512 Generator Set |
| 1DG | 3306B Generator Set | 3ZG | 3003 Industrial Engine |
| 1DG | 3306BH Generator Set | 3ZJ | 3406B Truck Engine |
| 1DW | 3196 Industrial Engine | 3ZJ | 3406C Truck Engine |
| 1FN | 3616 Marine Engine | 3ZW | 3512B Locomotive Engine |
| 1HZ | 3516B Generator Set | 40B | D326F Marine Engine |
| 1LG | 3408B Marine Engine | 40J | D346 Marine Engine |
| 1LM | 3512 Industrial Engine | 40S | 3208 Truck Engine |
| 1LS | 3406C Generator Set | 424 | 3024C Industrial Engine |
| 1LW | 3406E Truck Engine | 42B | D397D Marine Engine |
| 1ML | 3056 Industrial Engine | 444 | C4.4 Industrial Engine |
| 1MM | 3406E Truck Engine | 44B | D375D Marine Engine |
| 1NJ | 3116 Generator Set | 46B | D353C Industrial Engine |
| 1NS | 3304B Marine Engine | 46B | D353D Industrial Engine |
| 1NW | 3516B Generator Set | 46B | D353E Industrial Engine |
| 1PD | 3616 Generator Set | 47B | D353C Marine Engine |
| 1PD | 3616 Industrial Engine | 47B | D353D Marine Engine |
| 1PD | 3616 Locomotive Engine | 47B | D353E Marine Engine |
| 1PD | 3616 Marine Engine | 49B | D342C Industrial Engine |
| 1PS | 3304B Marine Engine | 49C | G399 Gas Engine |
| 1PW | 3512B Marine Engine | 49Y | 3512 Industrial Engine |
| 1RG | 3304 Gas Engine | 4AW | 3512B Generator Set |
| 1RG | G3304 Gas Engine | 4BM | 3406C Generator Set |
| 1RK | 3406 Gas Engine | 4BW | 3516B Marine Engine |
| 1RK | G3406 Gas Engine | 4BZ | 3412C Generator Set |
| 1RS | 3306B Marine Engine | 4CG | G3616 Gas Engine |
| 1SK | 3116 Marine Engine | 4CK | 3406B Truck Engine |
| 1SS | 3406C Marine Engine | 4CK | 3406C Truck Engine |
| 1TS | 3408C Marine Engine | 4CR | 3412E Industrial Engine |
| 1TW | 3508B Marine Engine | 4DL | G3306 Truck Engine |
| 1WF | SR4 Generator | 4DR | 3512 Generator Set |
| 1WM | 3126 Truck Engine | 4EK | G3516 Gas Engine |
| 1WZ | CPT372 Pumper | 4ES | 3126 Truck Engine |
| 1YB | 7211 Marine Transmission | 4EZ | 3126 Marine Engine |
| 1YF | 3304B Generator Set | 4FD | 3406 Gas Engine |
| 1YG | G3612 Gas Engine | 4FD | G3406 Gas Engine |
| 1YN | C12 Truck Engine | 4GB | 7251 Marine Transmission |
| 1ZB | 7221 Marine Transmission | 4GF | 3014 Industrial Engine |
| 1ZD | 3608 Marine Engine | 4GM | 3508B Generator Set |
| 1ZF | 3508 Generator Set | 4JK | 3406B Generator Set |
| 1ZG | 3114 Industrial Engine | 4JK | 3406C Generator Set |
| 1ZJ | 3126 Marine Engine | 4KC | 3512 Gas Engine |
| 20B | D364 Marine Engine | 4KC | G3512 Gas Engine |
| 23B | D337 Marine Engine | 4KG | 3116 Marine Engine |
| 23C | 3306 Industrial Engine | 4KR | 3114 Industrial Engine |
| 23C | D333C Industrial Engine | 4MD | SR4 Generator |
| 23Z | 3508 Generator Set | 4MG | 3406B Truck Engine |
| 24Z | 3512 Generator Set | 4MJ | 3516 Marine Engine |
| 25Z | 3516 Generator Set | 4PC | 3304 Generator Set |
| 27Z | 3516 Industrial Engine | 4PG | 3116 Industrial Engine |
| 28V | 3408 Truck Engine | 4PM | 3406B Generator Set |
| 28V | 3408B Truck Engine | 4RF | 3024 Industrial Engine |
| 28Z | 3516 Vehicular Engine | 4RG | 3406B Generator Set |
| 29A | 3208 Generator Set | 4RG | 3406C Generator Set |
| 29Z | 3516 Marine Engine | 4TB | 3406B Marine Engine |
| 2AF | 3512 Industrial Engine | 4TN | 3512B Marine Engine |
| 2AJ | 3306B Generator Set | 4TZ | SCT673 Pumper |
| 2AM | 3406C Generator Set | 4WB | 3306 Industrial Engine |
| 2AW | 3176C Industrial Engine | 4WD | G3508 Gas Engine |
| 2AZ | 3306C Truck Engine | 4WF | G3608 Gas Engine |
| 2BG | 3408B Generator Set | 4XB | 3304B Industrial Engine |
| 2BK | 3116 Truck Engine | 4XD | 3013 Industrial Engine |
| 2BM | 3508B Marine Engine | 4XF | 3516 Generator Set |
| 2CW | 3116 Truck Engine | 4ZK | 3054 Generator Set |
| 2ED | SR4 Generator | 4ZR | 3406C Generator Set |
| 2EK | 3406B Truck Engine | 4ZS | G3606B Industrial Engine |
| 2EZ | 3512B Marine Engine | 50B | D342C Marine Engine |
| 2FR | 3116 Truck Engine | 50Y | 3512 Marine Engine |
| 2FW | 3516B Marine Engine | 51Y | 3512 Vehicular Engine |
| 2GW | 3512B Marine Engine | 51Z | 3208 Truck Engine |
| 2HG | 3208 Generator Set | 54B | 1676 Truck Engine |
| 2HW | 3508B Generator Set | 54E | 3181 Marine Transmission |
| 2JF | G3508 Gas Engine | 56K | 7155 Heavy-Duty Transmission |
| 2JW | 3516B Generator Set | 57B | D330A Marine Engine |
| 2KK | 3304B Generator Set | 57K | D348 Vehicular Engine |
| 2KS | C12 Truck Engine | 57V | 3160 Generator Set |
| 2LZ | SPS342 Pumper | 57V | 3160 Industrial Engine |
| 2MR | 3116 Industrial Engine | 57V | 3160 Marine Engine |
| 2MW | 3618 Marine Engine | 57V | 1160 Truck Engine |
| 2MZ | 3406C Industrial Engine | 59B | D333A Marine Engine |
| 2PB | 7271 Marine Transmission | 5AA | SR4 Generator |
| 2PN | C10 Truck Engine | 5AW | 3512B Generator Set |
| 2PW | 3054 Generator Set | 5BA | SR4 Generator |
| 2RD | 3512B Marine Engine | 5CA | SR4 Generator |
| 2SG | 3116 Generator Set | 5CD | 3208 Truck Engine |
| 2TB | 3204 Industrial Engine | 5CK | SR4 Generator |
| 2TD | 3516B Marine Engine | 5DA | SR4 Generator |
| 2TJ | G3508 Generator Set | 5DS | 3406E Truck Engine |
| 2TM | 3306B Generator Set | 5DZ | 3176C Industrial Engine |
| 2TS | 3516 Generator Set | 5EA | SR4 Generator |
| 2WB | 3406B Generator Set | 5EF | 3114 Industrial Engine |
| 2WD | SR4 Generator | 5EK | 3406E Truck Engine |
| 2WG | 3116 Industrial Engine | 5EN | 3116 Industrial Engine |
| 2WJ | 3412 Generator Set | 5FA | SR4 Generator |
| 2WK | 3512 Locomotive Engine | 5FL | PM3412 Power Module |
| 2WS | 3406E Truck Engine | 5GA | SR4 Generator |
| 2XR | 3196 Marine Engine | 5GL | 3126B Truck Engine |
| 2YG | 3176 Truck Engine | 5GZ | 3306B Industrial Engine |
| 2ZC | 3306 Generator Set | 5HA | SR4 Generator |
| 304 | 3054E Industrial Engine | 5JA | SR4 Generator |
| 30A | 3208 Generator Set | 5JC | 3306 Generator Set |
| 30Z | 5650 Industrial Engine | 5JC | 3306B Generator Set |
| 311 | 3011C Industrial Engine | 5JD | G3512 Gas Engine |
| 313 | 3013C Industrial Engine | 5JG | 3114 Generator Set |
| 31B | D342 Industrial Engine | 5JJ | 3412E Machine Engine |
| 32B | D342 Marine Engine | 5JZ | 3116 Truck Engine |
| 32B | D342C Marine Engine | 5KA | SR4 Generator |
| 32R | D349 Vehicular Engine | 5KD | 3306B Truck Engine |
| 32Y | 3208 Truck Engine | 5KJ | 3406B Truck Engine |
| 334 | 3054C Industrial Engine | 5KJ | 3406C Truck Engine |
| 33B | D343 Marine Engine | 5KW | 3508B Generator Set |
| 344 | 3044C Industrial Engine | 5LA | SR4 Generator |
| 34Z | D379B Generator Set | 5MA | SR4 Generator |
| 356 | 3056E Industrial Engine | 5MF | 3054B Industrial Engine |
| 35B | D399 Industrial Engine | 5MJ | 3516 Marine Engine |
| 35Z | D398B Generator Set | 5NA | SR4 Generator |
| 36B | 1140 Truck Engine | 5NW | G3406 Industrial Engine |
| 36J | D348 Industrial Engine | 5PA | SR4 Generator |
| 36W | 7271 Marine Transmission | 5PG | 3608 Gen Set (Military) |
| 36Z | D399 Generator Set | 5PN | G3516 Gas Engine |
| 37Y | 3304 Gas Engine | 5PS | 3508B Locomotive Engine |
| 37Y | G3304 Gas Engine | 5PW | 3508 Generator Set |
| 38B | D337F Marine Engine | 5RA | SR4 Generator |
| 38J | D348 Marine Engine | 5RM | 3116 Truck Engine |
| 38S | 3412 Industrial Engine | 5SA | SR4 Generator |
| 39E | 7241 Marine Transmission | 5SJ | 3516 Generator Set |
| 39J | D346 Industrial Engine | 5TA | SR4 Generator |
| 3CF | 3306 Gas Engine | 5TD | SR4 Generator |
| 3CF | G3304 Gas Engine | 5TS | 3116 Industrial Engine |
| 3CS | C10 Truck Engine | 5UA | SR4 Generator |
| 3CW | 3516B Marine Engine | 5VA | SR4 Generator |
| 3CZ | SPT342 Pumper | 5WA | SR4 Generator |
| 3DM | 3508B Marine Engine | 5XA | SR4 Generator |
| 3DW | 3508B Marine Engine | 5XM | 3508 Generator Set |
| 3EF | SR4 Generator | 5XN | 3176 Truck Engine |
| 3ER | 3406C Industrial Engine | 5XS | 3508B Reman Engine |
| 3GS | 3126B Marine Engine | 5XZ | SPT343 Pumper |
| 3GW | 3056 Generator Set | 5YA | SR4 Generator |
| 3HM | 3508 Marine Engine | 5YF | 3208 Generator Set |
| 3JK | 3412 Marine Engine | 5YG | 3406B Truck Engine |
| 3JS | 3516 Generator Set | 5YL | 3114 Truck Engine |
| 3KS | 3306C Truck Engine | 5YS | 3054 Industrial Engine |
| 3LS | 3508B Generator Set | 5ZA | SR4 Generator |
Cat Engine SN Prefix 60B - BPJ
| Prefix | Model | Prefix | Model |
|---|---|---|---|
| 60B | D336 Marine Engine | 83Z | 3304 Generator Set |
| 60M | 3412 Marine Engine | 83Z | 3304B Generator Set |
| 61P | D349 Industrial Engine | 84Z | 3306 / 3306B Marine Engine |
| 62B | D343 Industrial Engine | 85Z | 3306 Generator Set |
| 62M | D333C Industrial Engine | 86B | D330A Marine Engine |
| 62P | D349 Marine Engine | 88B | D333A Marine Engine |
| 62U | D333C Industrial Engine | 88V | 3150 Generator Set |
| 62W | 3208 Truck Engine | 88V | 3150 Industrial Engine |
| 63B | D320A Industrial Engine | 88V | 3150 Truck Engine |
| 63Z | 3306 Truck Engine | 89B | 7261 Marine Transmission |
| 63Z | 3306B Truck Engine | 89V | 1145 Generator Set |
| 64B | G353D Gas Engine | 89V | 3145 Generator Set |
| 64Z | 3306 Industrial Engine | 89V | 1145 Truck Engine |
| 65B | 1693 Truck Engine | 8AR | 3412C Industrial Engine |
| 65P | 3145 Generator Set | 8AZ | 3406E Generator Set |
| 65Z | 3512 Industrial Engine | 8BZ | G3516 Generator Set |
| 666 | C6.6 Industrial Engine | 8CN | 3516B Marine Engine |
| 66B | D398 Industrial Engine | 8DF | 3512B Industrial Engine |
| 66B | D398B Industrial Engine | 8EM | 3512B Marine Engine |
| 66D | 3306 Industrial Engine | 8FD | SR4 Generator |
| 66D | D333C Industrial Engine | 8FS | 3406C Generator Set |
| 66P | 3150 Generator Set | 8GK | SR4 Generator |
| 66X | 7211 Marine Transmission | 8HF | SR4 Generator |
| 66Z | 3512 Marine Engine | 8HW | 3126 Truck Engine |
| 67B | D398A Marine Engine | 8JJ | 3306B Generator Set |
| 67B | D398B Marine Engine | 8KN | 3516B Marine Engine |
| 67D | 3306 Marine Engine | 8LD | G3516 Gas Engine |
| 67D | D333C Marine Engine | 8LL | 3608 Marine Engine |
| 67P | 3160 Generator Set | 8LW | G3412 Industrial Engine |
| 67U | 3408 Industrial Engine | 8NM | 3126 Marine Engine |
| 67U | 3408B Industrial Engine | 8NS | 3306B Generator Set |
| 67Z | 3512 Generator Set | 8NW | 3516B Generator Set |
| 68B | D379 Industrial Engine | 8PN | 3406C Truck Engine |
| 68B | D379B Industrial Engine | 8PW | G3516 Industrial Engine |
| 68D | G3304 Gas Engine | 8RB | 3606 Generator Set |
| 68D | G333C Gas Engine | 8RB | 3606 Industrial Engine |
| 68Z | 3508 Industrial Engine | 8RB | 3606 Locomotive Engine |
| 69B | D379A Marine Engine | 8RB | 3606 Marine Engine |
| 69B | D379B Marine Engine | 8RG | 3408B Marine Engine |
| 69D | 1673C Truck Engine | 8RM | 3512B Generator Set |
| 69D | 3306 Truck Engine | 8SB | 3406 Truck Engine |
| 69Z | 3508 Marine Engine | 8SZ | 3126 Truck Engine |
| 6AA | SR4 Generator | 8TC | 3406B Truck Engine |
| 6AF | 3114 Generator Set | 8TL | 3508 Marine Engine |
| 6BA | SR4 Generator | 8TW | 3516 Generator Set |
| 6BR | 3406E Industrial Engine | 8WL | 3116 Truck Engine |
| 6BW | 3176C Marine Engine | 8XL | 3304B Marine Engine |
| 6CA | SR4 Generator | 8YF | C12 Truck Engine |
| 6DA | SR4 Generator | 8YL | 3126B Truck Engine |
| 6DC | 3204 Industrial Engine | 8YR | G3408 Industrial Engine |
| 6EA | SR4 Generator | 8YS | C10 Truck Engine |
| 6FA | SR4 Generator | 8ZD | SR4 Generator |
| 6FK | 3054 Industrial Engine | 8ZZ | SPS343 Pumper |
| 6FW | G3408 Industrial Engine | 90N | 3208 Industrial Engine |
| 6GA | SR4 Generator | 90U | 3406 Industrial Engine |
| 6GF | SR4 Generator | 91B | D399 Marine Engine |
| 6GW | 3512B Generator Set | 91U | 3406 Marine Engine |
| 6HA | SR4 Generator | 92U | 3406 Truck Engine |
| 6HN | 3516B Generator Set | 93B | D334 Marine Engine |
| 6HZ | 3516B Locomotive Engine | 94B | 1674 Truck Engine |
| 6JA | SR4 Generator | 95B | 1160 Truck Engine |
| 6JW | G3512 Industrial Engine | 95Y | 3508 Industrial Engine |
| 6LA | SR4 Generator | 96B | 1150 Truck Engine |
| 6LB | 7261 Marine Transmission | 96Y | 3508 Marine Engine |
| 6MA | SR4 Generator | 97B | 1145 Truck Engine |
| 6MC | 3608 Generator Set | 97N | G343 Gas Engine |
| 6MC | 3608 Industrial Engine | 97Y | 3508 Vehicular Engine |
| 6MC | 3608 Locomotive Engine | 98M | 3160 Industrial Engine |
| 6MC | 3608 Marine Engine | 98N | D346 Vehicular Engine |
| 6MK | 3126 Marine Engine | 98X | 7221 Marine Transmission |
| 6MS | 3126 Industrial Engine | 99U | 3408 Marine Engine |
| 6NA | SR4 Generator | 99U | 3408B Marine Engine |
| 6NB | G3408 Gas Engine | 9AB | SR4 Generator |
| 6NR | 3054 Truck Engine | 9AN | 3516B Marine Engine |
| 6NZ | C15 Truck Engine | 9AW | G3508 Industrial Engine |
| 6PA | SR4 Generator | 9BR | 3412C Marine Engine |
| 6PK | SR4 Generator | 9BZ | 3456 Generator Set |
| 6PM | 3512 Generator Set | 9CF | SR4 Generator |
| 6PN | 3508B Generator Set | 9CJ | 3116 Truck Engine |
| 6PZ | 3126 Truck Engine | 9CK | 3176B Truck Engine |
| 6RA | SR4 Generator | 9DG | C9 Truck Engine |
| 6RJ | 3408B Gas Engine | 9DS | 3306B Generator Set |
| 6RW | 3126 Truck Engine | 9EP | 3412C Generator Set |
| 6RZ | SPF343 Pumper | 9ER | 3408C Industrial Engine |
| 6SA | SR4 Generator | 9ES | 3406C Generator Set |
| 6SR | 3126 Marine Engine | 9FR | 3612 Marine Engine |
| 6SS | 3512B Reman Engine | 9GK | 3116 Truck Engine |
| 6TB | 3406B Industrial Engine | 9HB | 3406 Industrial Engine |
| 6TJ | 3508 Locomotive Engine | 9HK | 3304B Generator Set |
| 6TS | 3406E Truck Engine | 9HP | C12 Marine Engine |
| 6WA | SR4 Generator | 9KF | 3516 Locomotive Engine |
| 6WN | 3512B Generator Set | 9KS | 3412E Marine Engine |
| 6WW | 3512 Generator Set | 9LL | 3114 Truck Engine |
| 6YB | 3304 Generator Set | 9LN | 3116 Truck Engine |
| 6ZA | SR4 Generator | 9NN | 3406E Generator Set |
| 6ZM | G3412 Gas Engine | 9NR | 3306B Generator Set |
| 70B | 1673 Truck Engine | 9NS | C12 Truck Engine |
| 70R | 3306 Industrial Engine | 9NZ | C15 Truck Engine |
| 70Z | 3508 Generator Set | 9PL | 3406B Generator Set |
| 714 | HT400 Pumper | 9PW | 3412E Marine Engine |
| 715 | SPP101 Pumper | 9RC | 3612 Generator Set |
| 71B | G342C Gas Engine | 9RC | 3612 Industrial Engine |
| 71Z | 3516 Industrial Engine | 9RC | 3612 Locomotive Engine |
| 72B | G379 Gas Engine | 9RC | 3612 Marine Engine |
| 72B | G379A Gas Engine | 9RR | G3412 Generator Set |
| 72S | 7155 Heavy-Duty Transmission | 9SL | 3306B Marine Engine |
| 72Z | 3516 Marine Engine | 9SM | C12 Truck Engine |
| 73B | G398 Gas Engine | 9SZ | 3126E Truck Engine |
| 73Z | 3516 Generator Set | 9TD | 3408B Industrial Engine |
| 74B | 1673 Truck Engine | 9TG | G3508 Gas Engine |
| 74E | 3192 Marine Transmission | 9TL | 3306C Truck Engine |
| 74E | 7251 Marine Transmission | 9WC | 3208 Industrial Engine |
| 75B | D398 Industrial Engine | 9WF | 3516B Industrial Engine |
| 75B | D398B Industrial Engine | 9WK | 3176B Marine Engine |
| 75V | 3208 Marine Engine | 9WN | 3508 Marine Engine |
| 75Z | 3406 Generator Set | 9WR | 3406E Marine Engine |
| 76B | D379 Industrial Engine | 9XF | 3412 Industrial Engine |
| 76B | D379B Industrial Engine | 9XM | 3408C Industrial Engine |
| 76R | 1673C Truck Engine | 9YN | 3116 Truck Engine |
| 76R | 3306 Truck Engine | 9ZF | 3126B Marine Engine |
| 77B | D353E Industrial Engine | 9ZR | 3126 Industrial Engine |
| 78B | 1673B Truck Engine | AAG | 3512B Marine Engine |
| 78Z | 3408 Generator Set | AKB | C10 Truck Engine |
| 78Z | 3408B Generator Set | ALS | C12 Truck Engine |
| 78Z | 3408C Generator Set | B1A | 3412C Reman Engine |
| 7AF | 3508B Industrial Engine | B5G | 3516B Marine Engine |
| 7AG | 3116 Truck Engine | B5R | C15 Truck Engine |
| 7AK | 3056 Generator Set | B8D | 3306B Generator Set |
| 7AS | 3126B Truck Engine | B9P | G3520C Generator Set |
| 7BF | SR4 Generator | BAG | 3508B Marine Engine |
| 7BL | 3412 Marine Engine | BAK | 3412C Generator Set |
| 7CZ | C16 Truck Engine | BAX | 3412C Generator Set |
| 7DB | G3412 Gas Engine | BAZ | G3408C Generator Set |
| 7DS | 3516B Reman Engine | BCK | 3516B Locomotive Engine |
| 7EB | 3204 Industrial Engine | BCS | 3412C Industrial Engine |
| 7EF | 3034 Industrial Engine | BCW | 3412C Generator Set |
| 7EZ | G3516B Generator Set | BCX | C10 Industrial Engine |
| 7FB | 3406B Truck Engine | BCY | C12 Generator Set |
| 7HB | 3306 Generator Set | BDL | C12 Industrial Engine |
| 7HG | 3412 Marine Engine | BDN | C18 Industrial Engine |
| 7HJ | 3116 Truck Engine | BDT | 3412 Industrial Engine |
| 7HM | 3512B Marine Engine | BDZ | 3126B Industrial Engine |
| 7HS | 3116 Truck Engine | BEJ | 3126B Industrial Engine |
| 7JB | 3306B Industrial Engine | BEM | C15 Industrial Engine |
| 7JL | 3116 Truck Engine | BEN | G3608 Industrial Engine |
| 7JZ | 3126 Truck Engine | BFD | 3408B Reman Engine |
| 7KF | 3306 Generator Set | BFF | 3408 Reman Engine |
| 7KM | 3516 Generator Set | BFM | C16 Industrial Engine |
| 7LG | 3176 Truck Engine | BFT | 3412E Industrial Engine |
| 7LZ | 3126 Truck Engine | BGA | 3456 Generator Set |
| 7MS | 3056 Industrial Engine | BGW | G3520B Generator Set |
| 7NJ | G3512 Gas Engine | BGX | 3508 Generator Set |
| 7PR | 3408E Industrial Engine | BKD | 3126B Truck Engine |
| 7RJ | 3306C Truck Engine | BKE | G3612 Industrial Engine |
| 7RN | 3516B Generator Set | BKS | 3412 Reman Engine |
| 7SF | 3116 Truck Engine | BKY | 3408E Reman Engine |
| 7SM | 3508B Marine Engine | BLB | G3616 Industrial Engine |
| 7SZ | G3512 Generator Set | BLF | 3512B Generator Set |
| 7WR | 3608 Industrial Engine | BLJ | 3412 Reman Engine |
| 7XC | 3406B Truck Engine | BLM | PM3508 Power Module |
| 80B | D333B Marine Engine | BMB | 3516B Generator Set |
| 81Z | 3412 Generator Set | BNF | 3412E Reman Engine |
| 81Z | 3412C Generator Set | BNR | PM3512 Power Module |
| 82B | D330B Marine Engine | BPD | PM3516 Power Module |
| 83B | 1673 Truck Engine | BPJ | 3516B Generator Set |
Cat Engine SN Prefix BPX - ZYD
| Prefix | Model | Prefix | Model |
|---|---|---|---|
| BPX | 3508B Industrial Engine | KNS | 3516B Reman Engine |
| BPY | PM3508 Power Module | KPS | 3406C Generator Set |
| BRC | 3512B Industrial Engine | L1K | C4.4 Generator Set |
| BRF | PM3512 Power Module | LBM | C7 Truck Engine |
| BRK | 3512B Generator Set | LDL | C280-6 Marine Engine |
| BRN | 3512B Marine Engine | LEE | C13 Truck Engine |
| BTB | 3508B Reman Engine | LEF | 3126B Truck Engine |
| BTR | 3508B Reman Engine | LEK | 3516B Generator Set |
| BWA | 3508B Reman Engine | LGK | C13 Industrial Engine |
| BXS | C15 Truck Engine | LLA | 3512C Petroleum Industry Engine |
| C1G | 3456 Generator Set | LLB | 3512C Petroleum Industry Engine |
| C1J | C18 Marine Engine | LLC | 3508C Petroleum Industry Engine |
| C1M | C1.6 Industrial Engine | LLE | 3508C Petroleum Industry Engine |
| C1Z | C12 Marine Engine | LLF | 3512C Petroleum Industry Engine |
| C2G | 3406C Generator Set | LPD | 3508B Generator Set |
| C2T | 3456 Generator Set | LRW | 3306B Generator Set |
| C3G | 3456 Generator Set | LRX | 3406C Generator Set |
| C3M | C1.1 Industrial Engine | LRY | 3412C Generator Set |
| C4G | 3456 Generator Set | MAD | G3520C Generator Set |
| C4M | C2.2 Industrial Engine | MBD | C9 Industrial Engine |
| C5E | C15 Generator Set | MBJ | C10 Truck Engine |
| C5G | 3406C Generator Set | MBL | C12 Truck Engine |
| C5H | C15 Generator Set | MBN | C15 Truck Engine |
| C5L | C15 Generator Set | MDP | C18 Truck Engine |
| C5M | C0.5 Industrial Engine | MED | C32 Power Module |
| C5N | C1.5 Industrial Engine | MEP | C18 Truck Engine |
| C6C | C18 Generator Set | MGS | C18 Generator Set |
| C6F | C0.5 Industrial Engine | MHP | C15 Truck Engine |
| C6H | C0.5 Industrial Engine | MKH | 3512B Marine Engine |
| C7B | C7 Marine Engine | MMC | C4.4 Generator Set |
| C7D | C7 Marine Engine | MRG | 3512B Marine Engine |
| C7M | C0.7 Industrial Engine | MSK | 3516B Reman Engine |
| C7S | C7 Truck Engine | MSX | 3516B Reman Engine |
| C7X | C7 Marine Engine | MTB | C9 Truck Engine |
| C7Z | C7 Marine Engine | MXS | C15 Truck Engine |
| C8G | 3406C Generator Set | N4F | G3304 Industrial Engine |
| C9A | C9 Marine Engine | NAX | C18 Marine Engine |
| C9B | C9 Marine Engine | NAY | C18 Marine Engine |
| C9S | C9 Truck Engine | NDT | C280-8 Marine Engine |
| CAC | PM3516 Power Module | NKB | C280-16 Marine Engine |
| CAH | 3456 Generator Set | NPH | C7 Truck Engine |
| CAJ | PM3412 Power Module | NPM | 3512B Reman Engine |
| CAL | 3516 Generator Set | NSC | 3512B Generator Set |
| CAN | 3516B Industrial Engine | NXS | C15 Truck Engine |
| CAW | 3508 Generator Set | NZA | 3612 Marine Engine |
| CBB | 3508B Industrial Engine | PAG | 3516B Marine Engine |
| CBN | 3516B Marine Engine | PBR | 3516B Generator Set |
| CBX | 3456 Generator Set | PES | 3516C Petroleum Industry Engine |
| CCB | 3456 Generator Set | PFH | 3406C Generator Set |
| CDE | 3516B Marine Engine | PKA | C280-8 Marine Engine |
| CEY | G3516B Generator Set | PPS | PP3516 Generator Set |
| CFD | PMG3516 Power Module | PTC | 3516B Generator Set |
| CHN | 3054 Generator Set | PTD | 3516 Generator Set |
| CJP | C18 Truck Engine | PTF | 3512B Generator Set |
| CKH | C18 Marine Engine | PTG | 3512 Generator Set |
| CKK | 3126 Industrial Engine | PTH | 3508C Generator Set |
| CKM | 3126E Truck Engine | PTJ | 3508B Generator Set |
| CKP | C9 Truck Engine | PTK | 3508C Generator Set |
| CKS | 3056 Marine Engine | PTL | 3412C Generator Set |
| CLJ | C9 Industrial Engine | PTM | 3512B Generator Set |
| CLX | C30 Marine Engine | PTN | 3508B Generator Set |
| CMC | 3512B Generator Set | PWG | 3512B Industrial Engine |
| CMD | 3516 Generator Set | R1A | 3512C Petroleum Industry Engine |
| CME | G3516B Generator Set | R7A | G3412 Generator Set |
| CMJ | 3512 Generator Set | R7E | G3406 Generator Set |
| CNB | 3508B Generator Set | RDW | C280-12 Marine Engine |
| CND | 3512B Reman Engine | REA | 3412D Marine Engine |
| CNF | 3508 Generator Set | RKT | 3516 Generator Set |
| CNR | G3306 Generator Set | RLA | C15 Marine Engine |
| CPA | 3516B Generator Set | RLR | 3412C Generator Set |
| CPD | C12 Truck Engine | RMN | 3616 Marine Engine |
| CPG | G3516 Generator Set | RMS | 3512C Generator Set |
| CPJ | G3508 Generator Set | RNC | C32 Marine Engine |
| CPP | 3034 Marine Engine | RTY | 3412C Generator Set |
| CPS | G3508 Generator Set | RXB | C32 Marine Engine |
| CPW | 3516B Reman Engine | S1M | C4.4 Generator Set |
| CPY | G3508 Generator Set | S2A | 3508B Marine Engine |
| CRN | G3512 Generator Set | S2B | 3508B Marine Engine |
| CRP | 3126E Truck Engine | S2D | 3508B Marine Engine |
| CSB | SBF214 Pumper | S2E | 3508B Marine Engine |
| CSC | G3516B Generator Set | S2F | 3508B Marine Engine |
| CSH | 3054B Marine Engine | S2G | 3512B Marine Engine |
| CSM | 3116 Truck Engine | S2H | 3512B Marine Engine |
| CSN | C9 Marine Engine | S2J | 3512B Marine Engine |
| CSP | G3512 Generator Set | S2K | 3512B Marine Engine |
| CSZ | G3516 Generator Set | S2L | 3512B Marine Engine |
| CWD | G3520B Generator Set | S2M | 3512B Marine Engine |
| CWW | G3520C Generator Set | S2N | 3512B Marine Engine |
| CWY | G3520C Generator Set | S2P | 3516B Marine Engine |
| CYK | 3054 Marine Engine | S2R | 3516B Marine Engine |
| CYN | C18 Marine Engine | S2S | 3516B Marine Engine |
| DCD | 3126B Industrial Engine | S2T | 3516B Marine Engine |
| DCS | 3126B Industrial Engine | S2W | 3516B Marine Engine |
| DED | 3304B Generator Set | S2X | 3516B Marine Engine |
| DJN | 3412C Generator Set | S2Y | 3516B Marine Engine |
| DKE | C18 Generator Set | S2Z | 3516B Marine Engine |
| DLA | 3408 Reman Engine | SAP | C7 Truck Engine |
| DLR | G3508 Gas Engine | SBG | 3512C Generator Set |
| DPF | 3126E Truck Engine | SBJ | 3516C Generator Set |
| DWB | C27 Generator Set | SBK | 3516C Generator Set |
| E3J | C3.3 Industrial Engine | SCB | C280-6 Marine Engine |
| ECP | 3408E Reman Engine | SDP | C15 Truck Engine |
| EFA | 3306B Generator Set | SDW | 3512B Reman Engine |
| EGH | C15 Truck Engine | SJB | C9 Generator Set |
| EJG | C18 Industrial Engine | SLY | G3516E Generator Set |
| EKW | C18 Generator Set | SMP | C32 Petroleum Industry Engine |
| EPE | 3456 Generator Set | SNX | 3056 Generator Set |
| ETK | C9 Truck Engine | SRB | C9 Truck Engine |
| FDE | 3512B Generator Set | SSR | G3512E Generator Set |
| FDN | 3516B Generator Set | STD | C18 Generator Set |
| FDR | 3512 Generator Set | STM | C18 Generator Set |
| FDX | 3516B Generator Set | STR | C27 Generator Set |
| FFG | 3512B Marine Engine | SXC | C32 Generator Set |
| FML | C7 Truck Engine | SXY | G3520E Generator Set |
| FMM | C7 Truck Engine | T2X | 3516C Locomotive Engine |
| G1P | 3011C Industrial Engine | TAF | C1.5 Generator Set |
| G3E | 3126E Truck Engine | TAG | C2.2 Generator Set |
| G3P | 3013C Industrial Engine | TAK | 3516B Generator Set |
| G4C | C18 Generator Set | TAM | 3408C Generator Set |
| G4P | 3024C Industrial Engine | TCN | 3054 Generator Set |
| G6X | G3306 Industrial Engine | TDX | C280-16 Marine Engine |
| G7M | C2.2 Industrial Engine | TFT | 3412C Generator Set |
| G7N | C1.5 Industrial Engine | TGC | 3412 Generator Set |
| G8M | C1.1 Industrial Engine | TJB | G3516C Generator Set |
| GAR | 3516B Generator Set | TJC | G3516C Generator Set |
| GAS | G3516E Generator Set | TLD | C32 Industrial Engine |
| GET | G3520B Industrial Engine | TME | C12 Truck Engine |
| GHJ | 3456 Generator Set | TSJ | C280-12 Marine Engine |
| GLS | C11 Industrial Engine | TTA | 3508C Marine Engine |
| GNS | G3512 Gas Engine | TTB | 3508C Marine Engine |
| GSB | G3516C Generator Set | TWM | C27 Industrial Engine |
| GZG | G3520E Generator Set | W1A | C16 Truck Engine |
| GZH | G3520E Generator Set | WAX | C7 Truck Engine |
| GZJ | G3520C Generator Set | WDR | C32 Generator Set |
| GZK | G3520C Generator Set | WJH | C18 Industrial Engine |
| GZL | G3520C Generator Set | WPM | G3508 Gas Engine |
| GZM | G3520C Generator Set | WPN | G3508 Gas Engine |
| GZN | G3520C Generator Set | WPP | G3512 Gas Engine |
| GZP | G3520B Generator Set | WPR | G3512 Gas Engine |
| GZR | 3516 Generator Set | WPS | G3516 Gas Engine |
| GZS | 3516B Generator Set | WPT | G3516 Gas Engine |
| GZT | 3516B Generator Set | WPW | G3516 Gas Engine |
| GZX | 3516 Generator Set | X3R | C9 Generator Set |
| GZY | 3516B Generator Set | X4R | C15 Generator Set |
| GZZ | G3516C Generator Set | X6X | C18 Power Module |
| HAL | G3520E Generator Set | X9X | C9 Marine Engine |
| HAT | G3520C Generator Set | YPG | C7 Truck Engine |
| HEP | 3126E Truck Engine | Z2A | 3126B Petroleum Industry Engine |
| JAM | C13 Truck Engine | Z2B | C10 Industrial Engine |
| JAS | C15 Industrial Engine | Z2C | C15 Petroleum Industry Engine |
| JAW | C2.2 Generator Set | Z2D | 3412E Petroleum Industry Engine |
| JCA | G3306 Generator Set | Z9X | C9 Marine Engine |
| JLW | C9 Industrial Engine | ZAB | 3508 Generator Set |
| JRA | C7 Industrial Engine | ZAD | 3508B Generator Set |
| JRE | C15 Industrial Engine | ZAF | 3512 Generator Set |
| JSC | C9 Industrial Engine | ZAH | 3512B Generator Set |
| JTF | C7 Industrial Engine | ZAJ | 3512B Generator Set |
| KAL | C7 Truck Engine | ZAL | 3516 Generator Set |
| KAM | 3508B Reman Engine | ZAP | 3516B Generator Set |
| KAP | G3412 Generator Set | ZAR | 3516B Generator Set |
| KAR | G3406 Generator Set | ZAZ | G3516 Generator Set |
| KCA | C11 Truck Engine | ZBA | G3516 Generator Set |
| KCB | C13 Truck Engine | ZBB | G3516B Generator Set |
| KDK | 3516B Reman Engine | ZBC | G3516B Generator Set |
| KJT | C18 Marine Engine | ZYD | 3616 Locomotive Engine |
Identifying the correct serial number on a Caterpillar engine or generator is essential for finding accurate parts, service information, and technical specifications. Every Cat power unit, whether an industrial engine, truck engine, marine engine, or generator set - carries a unique serial number plus additional identifiers such as the Modification Number, Arrangement Number, OEM Number and Performance Specification for complete gensets.
The serial number is typically referenced on the plate by the label, “serial number” or abbreviated version, such as S/N or SER. NO. Now that you've identified your serial number, you can look up parts for your engine by model and serial number or from official CAT's Parts Manuals.
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