AMOCS Radiator Core Module for Caterpillar D7R, D8R & Pipelayers | 1139539

Fits Models At A Glance:

• Caterpillar Track-Type Tractors: D7R, D7R II, D8N, D8R, D8R II, D8 GC
• Caterpillar Pipelayers: 572R II, 583R, 587R

Serial Number Notes:

• 583R: 2XS00001-UP
• 587R: BXL00001-UP
• D7R: 2EN00001-UP, 2HR00001-UP, 3DN00001-UP, 3ZR00001-UP, 4SR00001-UP, 5KZ00001-UP, 5MR00001-UP, 6ER00001-UP, 9HM00001-UP, DSH00001-UP, R7B00001-UP
• D7R II: ABJ00001-UP, ACS00001-UP, ADW00001-UP, AEC00001-UP, AFG00001-UP, AGN00001-UP, BNM00001-UP, BNX00001-UP, BPK00001-UP, BPT00001-UP, BRM00001-UP, BRP00001-UP, KNA00001-UP
• D8R: 7XM00001-UP, 9EM00001-UP, DWJ00001-UP, JR800001-UP, MEJ00001-UP, RJM00001-UP, T5X00001-UP
• D8R II: 6YZ00001-UP, AKA00001-UP

Superseding & Cross-Reference Numbers:

• Caterpillar publishes no replacement or superseding number for 113-9539.
• Easy to confuse with 1093622 (Caterpillar 109-3622), which Caterpillar shows as a related part on this number's own page. Both modules are 1491 mm long and differ by about 8 mm in height. Measure the module you are replacing.
• Caterpillar's catalog adds the D8N, D8 GC and the 572R II pipelayer to the machines the supplier list carries.

Key Notes:

• Part Number: 1139539 (Caterpillar reference 113-9539)
• Type: Modular radiator core section - one module, not a complete radiator
• Construction: Caterpillar Advanced Modular Cooling System module
• Dimensions: 1491 mm x 147 mm
• Material: Carbon steel and alloy mixed metal
• Weight: 38.0 lbs.
• Condition: Aftermarket replacement part
• Application: Replaces an AMOCS radiator core module on Caterpillar D7R, D8R and D8N track-type tractors and 572R II through 587R pipelayers
• Shipping Restrictions: Ships to the lower 48 US states only
• Note: This is ONE module. The radiator on these machines is a stack of them, so establish how many are damaged before ordering. End tanks, seals, spacers and hardware are not included. This module is the taller of the two 1491 mm AMOCS strips; check against 109-3622 before ordering. Ships LTL freight.

Common Use Case or Symptoms:

Order these when a D7R or D8R is dropping coolant from one strip of the stack, or when a module has been crushed by debris coming over the blade - on a dozer working timber or rock, single-module damage is far more common than a whole radiator failing.

Why Choose Broken Tractor?

• ✅ Damage Is Usually Local: A stick through one strip does not condemn the stack, and the modular design is what makes that repair possible.
• ✅ Dozers And Pipelayers Together: D7R and D8R families alongside the 572R II, 583R and 587R on one module.
• ✅ Taller Of The Pair: 1491 by 147 mm against the 140 mm module - eight millimetres is the whole difference, and it is worth measuring for.