Oil Cooler Core Assembly for Caterpillar D6H, D6R & D7R Dozers | 4P0854

Fits Models At A Glance:

• Caterpillar Dozers: D6H, D6H II, D6H XL, D6H XR, D6R, D7R

Serial Number Notes:

• D6H: 1FJ00001-UP, 1KD00001-UP, 2KD00001-UP, 2TG00001-UP, 3ED00001-UP, 3YG00001-UP, 3YJ00001-UP, 3ZF00001-UP, 4GG00001-UP, 4LG00001-UP, 4RC00001-UP, 4YF00001-UP, 5HF00001-UP, 6CF00001-UP, 6FC00001-UP, 7PC00001-UP, 8FC00001-UP, 8KB00001-UP, 8YC00001-UP
• D6H XL: 8ZJ00001-UP
• D6H XR: 5KK00001-UP
• D6R: 1RW00001-UP, 2HM00001-UP, 2YN00001-UP, 3ZN00001-UP, 4FM00001-UP, 4HN00001-UP, 4JR00001-UP, 4MN00001-UP, 4TR00001-UP, 4WR00001-UP, 5LN00001-UP, 5PR00001-UP, 5RR00001-UP, 6FR00001-UP, 6GR00001-UP, 6HR00001-UP, 6JN00001-UP, 6MR00001-UP, 7AR00001-UP, 7DR00001-UP, 7GR00001-UP, 7KN00001-UP, 8LN00001-UP, 8TM00001-UP, 8XN00001-UP, 9BM00001-UP, 9MN00001-UP, 9PN00001-UP, 9ZS00001-UP, DMP00001-UP, S6T00001-UP, S6X00001-UP, S6Y00001-UP, SSS00001-UP
• D7R: 2EN00001-UP, 2HR00001-UP, 3DN00001-UP, 3ZR00001-UP, 4SR00001-UP, 5KZ00001-UP, 5MR00001-UP, 6ER00001-UP, 9HM00001-UP, DSH00001-UP, R7B00001-UP

Key Notes:

• Part Number: 4P0854 (Caterpillar reference 4P-0854)
• Type: Oil cooler core assembly - core only, no tanks or frame
• Function: Holds hydraulic and implement oil at working temperature, separate from the engine coolant circuit
• Material: Carbon, alloy and structural steel
• Weight: 56.0 lbs.
• Condition: Aftermarket replacement part
• Application: Replaces the oil cooler core on Caterpillar D6H, D6R and D7R dozers, including the D6H XL and D6H XR variants
• Shipping Restrictions: Ships to the lower 48 US states only
• Note: This is the OIL COOLER core, not a radiator core - Caterpillar lists it alongside ripper, bulldozer and winch attachment groups, which is consistent with a hydraulic circuit rather than engine cooling. Tanks, seals, lines and hardware are not included. Caterpillar publishes no dimensions for this core; measure before ordering. Ships LTL freight.

Common Use Case or Symptoms:

Replace this when implement hydraulics slow down and get hot late in a shift, when the oil cooler is seeping onto the frame rails, or when the fins have packed solid behind the radiator - a dozer pushing all day makes more oil heat than most operators expect, and a plugged cooler shows up as sluggish blade response first.

Why Choose Broken Tractor?

• ✅ Oil Circuit Core: Carries hydraulic and implement oil, not engine coolant - a different complaint and a different part from a radiator core.
• ✅ Six D6 And D7 Variants: D6H through D7R including the XL and XR builds on one core.
• ✅ Steel Built For Pressure: Carbon, alloy and structural steel, which is what an oil circuit core needs that a coolant core does not.