Komatsu Thermostat 600-421-6110

The Komatsu Thermostat 600-421-6110 is identified in the supplied parts catalog as a COOLING SYSTEM for specific Komatsu diesel engine and equipment configurations. Cataloged engine models include 4D95L-W-1, 4D95L-1K-1L, 4D95L-1AA/1AA-7/1BB/1CC, and S4D95L-1A/1B/1G. Listed machine applications include WA40-1, WA70-1, PC60-3, PC60-5, and PC60L-5. Use the complete model and serial-number details below to compare this part with the equipment being serviced.

What is 600-421-6110 used for?

Part number 600-421-6110 is cataloged as a Thermostat. It appears in the COOLING SYSTEM parts group. The correct selection depends on the engine model, machine model, and the applicable serial-number range.

Compatible engine models

4D95L-W-1, 4D95L-1K-1L, 4D95L-1AA/1AA-7/1BB/1CC, S4D95L-1A/1B/1G, S4D95L-1K, S4D95LE-3A-2, 6D95L-1, 6D95L-1AF-1, S6D95L-1, SA6D95L-1, 4D105-3C, S4D105-1 & 2, S4D105-3

Engine models with serial-number ranges

4D95L-W-1 (Build 1A) ? 10001-Up | 4D95L-1K-1L (Build 1B) ? 15548-Up | 4D95L-1AA/1AA-7/1BB/1CC (Build 1C) ? 49965-Up | S4D95L-1A/1B/1G (Build 1H) ? 48811-Up | S4D95L-1K (Build 1J) ? 135080-Up | S4D95LE-3A-2 (Build 1K) ? 100001-Up | 6D95L-1 (Build 2A) ? 10001-Up | 6D95L-1 (Build 2B) ? 69586-Up | 6D95L-1AF-1 (Build 2C) ? Not Provided | S6D95L-1 (Build 2E) ? 10001-Up | S6D95L-1 (Build 2F) ? 35360-Up | SA6D95L-1 (Build 2J) ? 35398-Up | 4D105-3C (Build 5A) ? 40138-Up | S4D105-1 & 2 (Build 5D) ? 19078-Up | S4D105-3 (Build 5E) ? 44579-Up

Application models without serial numbers

WA40-1, WA70-1, PC60-3, PC60-5, PC60L-5, PC60U-5, PW60-3, PC80-3, PC75UU-1, PC60-6, PC60L-6, PC70-6, PC90-1, PC100-5, PC120-5, PC120-5, PC120-5C, PC120-5M, PC120-5Z, PC130-5, PC100-6 / 6Z, PC100L-6, PC120-6 / 6Z, PC130-6, PW130-6K, PC78MR-6-N, PC78US-6-N, D31E-18, D31P-18, D31P-18A, D31S-18, D37E-2 / P2, PC100-3, PC100L-3, PC120-3, PW150-1, WA100, WA100-3, WA120-1, D31E-20, D31E-20, D31E-20, D31P, PL, PLL-20, D31P-20A, D37E-2 / P2, D37E-5, D37P-5A, GD305A-1A, WA120-3, PC150-3 / LC-3, PC180LC-C / LC-3K, PC180LLC-C / LLC-3K, PC180NLC-3K, PW100-3, WA150-1, WA180-1, GD510R-1, GD511A-1, PC150-5 / LC-5, PC200-5C, PC200-5 / LC-5, PC200-5 /LC-5, PC200-5T, PC200-5Z, PC200-5 / LC-5, PC220-5, PC220LC-5, PC220LC-5, D31A-16, D31P, PL, PLL-16, D31P-16A, D31Q-16, D31S-16, D40A-1, D40AF-1A, D40PF-1A, D40PL-1, D45A-1, D45P-1

Applications with serial-number ranges

WA40-1 S/No. 1001-Up, WA70-1 S/No. 10001-Up, PC60-3 S/No. 18001-Up, PC60-5 S/No. 20501-Up, PC60L-5 S/No. 7501-Up, PC60U-5 S/No. 4501-Up, PW60-3 S/No. 2001-Up, PC80-3 S/No. 2001-Up, PC75UU-1 S/No. 1001-Up, PC60-6 S/No. 28001-Up, PC60L-6 S/No. 8001-Up, PC70-6 S/No. 34101-Up, PC90-1 S/No. 1001-Up, PC100-5 S/No. 28001-Up, PC120-5 S/No. 30001-Up, PC120-5 S/No. A40001-Up, PC120-5C S/No. 36601-Up, PC120-5M S/No. 36601-Up, PC120-5Z S/No. 36601-Up, PC130-5 S/No. 36601-Up, PC100-6 / 6Z S/No. 40001-Up, PC100L-6 S/No. 15001-Up, PC120-6 / 6Z S/No. 45001-Up, PC130-6 S/No. 45001-Up, PW130-6K S/No. K30001-Up, PC78MR-6-N S/No. 1001-Up, PC78US-6-N S/No. 4001-Up, D31E-18 S/No. 40001-Up, D31P-18 S/No. 40001-Up & 40765-Up, D31P-18A S/No. 40001-Up & 40765-Up, D31S-18 S/No. 40001-Up, D37E-2 / P2 S/No. 1501-2500, PC100-3 S/No. 18001-Up, PC100L-3 S/No. 12001-Up, PC120-3 S/No. 18001-Up, PW150-1 S/No. 1001-Up, WA100 S/No. 10001-UP, WA100-3 S/No. 10001-UP, WA120-1 S/No. 10001-UP, D31E-20 S/No. 40087-42000, D31E-20 S/No. 42001-Up, D31E-20 S/No. 40523-Up, D31P, PL, PLL-20 S/No. 45001-Up, D31P-20A S/No. 45001-Up, D37E-2 / P2 S/No. 1501-2500-Up, D37E-5 S/No. 1606-3001-Up & A1924-Up, D37P-5A S/No. 1543-3001-Up & 1649-Up, GD305A-1A S/No. 6734-Up, WA120-3 S/No. 50001-52999, PC150-3 / LC-3 S/No. 3001-Up, PC180LC-C / LC-3K S/No. 1001-Up, PC180LLC-C / LLC-3K S/No. 1001-Up, PC180NLC-3K S/No. 1001-Up, PW100-3 S/No. 1601-Up, WA150-1 S/No. 10001-Up, WA180-1 S/No. 10001-Up & A10375-Up, GD510R-1 S/No. 15001-Up, GD511A-1 S/No. 10001-Up, PC150-5 / LC-5 S/No. 6001-Up, PC200-5C S/No. 45001-Up, PC200-5 / LC-5 S/No. 45001-Up, PC200-5 /LC-5 S/No. A47282-A70000, PC200-5T S/No. 58019-Up, PC200-5Z S/No. 45001-Up, PC200-5 / LC-5 S/No. A70001-Up, PC220-5 S/No. 35001-Up, PC220LC-5 S/No. 35001-Up, PC220LC-5 S/No. A35401-A70000-Up, D31A-16 S/No. 25001-Up, D31P, PL, PLL-16 S/No. 25001-Up, D31P-16A S/No. 25001-Up, D31Q-16 S/No. 25001-Up, D31S-16 S/No. 25001-Up, D40A-1 S/No. 1501-Up, D40AF-1A S/No. 2201-Up, D40PF-1A S/No. 2201-Up, D40PL-1 S/No. 1501-Up, D45A-1 S/No. 1501-Up, D45P-1 S/No. 1501-Up

How do I confirm fitment?

Match 600-421-6110 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 600-421-6110 fit every listed Komatsu machine?
No. Fitment is limited to the cataloged engine, application, and serial-number combinations. Confirm all identifying information before ordering.