Komatsu Rear Seal 6151-21-4150

The Komatsu Rear Seal 6151-21-4150 is identified in the supplied parts catalog as a CRANKSHAFT & RELATED PARTS for specific Komatsu diesel engine and equipment configurations. Cataloged engine models include S6D125-1, S6D140-1, SA6D140E-2 & SAA6D140E-2, and SA6D140-1. Listed machine applications include D60F-8, D75S-5, PC300-3 / LC-3, PC360LC-3 10001-UP, and PC400-3 / LC-3. Use the complete model and serial-number details below to compare this part with the equipment being serviced.

What is 6151-21-4150 used for?

Part number 6151-21-4150 is cataloged as a Rear Seal. It appears in the CRANKSHAFT & RELATED PARTS parts group. The correct selection depends on the engine model, machine model, and the applicable serial-number range.

Compatible engine models

S6D125-1, S6D140-1, SA6D140E-2 & SAA6D140E-2, SA6D140-1, SAA6D140E-5A/B/C

Engine models with serial-number ranges

S6D125-1 (Build 10E) ? Not Provided | S6D140-1 (Build 12A) ? Not Provided | SA6D140E-2 & SAA6D140E-2 (Build 12B) ? Not Provided | SA6D140-1 (Build 12C) ? Not Provided | SAA6D140E-5A/B/C (Build 12E) ? 530001-Up

Application models without serial numbers

D60F-8, D75S-5, PC300-3 / LC-3, PC300-3 / LC-3, PC360LC-3 10001-UP, PC400-3 / LC-3, PC400-5 / HD-5K, PC400-5A / 5C /5T, PC400LC-5A / 5T, PC400LC-5 / LC-5T, PC400LC-5 / LC-5T, PC410-5 / LC-5, WA450-1, WA450-3L, WA450-3LL, WA470-1, WA470-3H Active H20051-20668, WA470-3X, WA470-3, GD705A-4, GD725A-1, HA250-1, HA250-3, HA270-1, HA270-3, HD205-3, WA500-1, WA500-1L, WA500-3, D135A-2, D155A-3, D155AX-3, GD825A-2, PC1600SP-1, PC1800-6, D155A-5, GD825A-1, D155AX-5, D355C-3-A, HD325-6, D355C-3-DA, HD325-6Z, PC750-6 /LC-6 / SE-6, HD405-6, PC750LC-6K-01, HD405-6, PC750SE-6K / 6K-01, WD500-3, PC800-6 / SE-6, PC650-3, PC650LC-3, PC650SE-3, PC650-5, PC650E-5, PC650LC-5, PC650SE-5, PC710-5 / SE-5, PC1600-1, HD325-5, HD325-6/6W, D27AX-5EO, PC600LC-8, WA500-7

Applications with serial-number ranges

D60F-8 S/No. 45001-Up, D75S-5 S/No. 15001-Up, PC300-3 / LC-3 S/No. 12001-Up, PC300-3 / LC-3 S/No. A14398-Up, PC400-3 / LC-3 S/No. 11001-Up, PC400-5 / HD-5K S/No. 20001-Up, PC400-5A / 5C /5T S/No. 10351-Up, PC400LC-5A / 5T S/No. 10351-Up, PC400LC-5 / LC-5T S/No. 20001-Up, PC400LC-5 / LC-5T S/No. A20109-Up, PC410-5 / LC-5 S/No. 10001-Up, WA450-1 S/No. 10001-Up & A20038-Up, WA450-3L S/No. 53001-Up, WA450-3LL S/No. 50305-Up, WA470-1 S/No. 10001-Up, WA470-3X S/No. 50001-52999, WA470-3 S/No. 53001-Up, GD705A-4 S/No. 21001-Up, GD725A-1 S/No. 50001-Up, HA250-1 S/No. 60636-Up, HA250-3 S/No. 303001-Up, HA270-1 S/No. 65226-Up, HA270-3 S/No. 313001-Up, HD205-3 S/No. 1003-Up, WA500-1 S/No. 10001-Up & A20131-Up, WA500-1L S/No. A20854-Up, WA500-3 S/No. 50001-Up, D135A-2 S/No. 10301-Up, D155A-3 S/No. 60001-Up, D155AX-3 S/No. 60001-Up, GD825A-2 S/No. 11001-Up, PC1600SP-1 S/No. 10001-Up, PC1800-6 S/No. 10001-Up, D155A-5 S/No. 65001-Up, GD825A-1 S/No. 10002-Up, D155AX-5 S/No. 70001-Up, D355C-3-A S/No. 23933-Up, HD325-6 S/No. 5001-Up, D355C-3-DA S/No. 14263-Up, HD325-6Z S/No. 5001-Up, PC750-6 /LC-6 / SE-6 S/No. 10001-Up, HD405-6 S/No. 1001-Up, PC750LC-6K-01 S/No. K30001-Up, HD405-6 S/No. 5001-Up, PC750SE-6K / 6K-01 S/No. K30001-Up, WD500-3 S/No. 50001-Up, PC800-6 / SE-6 S/No. 30001-Up, PC650-3 S/No. 10501-Up, PC650LC-3 S/No. 10501-Up, PC650SE-3 S/No. 10501-Up, PC650-5 S/No. 20001-Up, PC650E-5 S/No. 20001-Up, PC650LC-5 S/No. 20001-Up, PC650SE-5 S/No. 20001-Up, PC710-5 / SE-5 S/No. 10001-Up, PC1600-1 S/No. 10063-Up, HD325-5 S/No. 2001-Up & A3027-Up, HD325-6/6W S/No. 5001-Up

How do I confirm fitment?

Match 6151-21-4150 to the existing part number and verify the complete engine model, equipment model, and serial number. A shared model name does not confirm compatibility because production changes can affect the required component.

Frequently asked question

Will 6151-21-4150 fit every listed Komatsu machine?
No. Fitment is limited to the cataloged engine, application, and serial-number combinations. Confirm all identifying information before ordering.