8M4389 Silicone O-ring for Caterpillar

The 8M4389 is a preformed silicone O-ring used in Caterpillar Challenger equipment, including the 65C, 65D, 65E, 75C, 75D, 75E, 85C, 85D, 85E, and 95E models. This is a new aftermarket spare part manufactured by CTP (Costex Tractor Parts).

The part is listed as a hardware component and is identified by the Caterpillar equipment part number 8M4389. It is supplied as a preformed sealing component for the specified machine applications.

Fitment

• Caterpillar Challenger 65C
• Caterpillar Challenger 65D
• Caterpillar Challenger 65E
• Caterpillar Challenger 75C
• Caterpillar Challenger 75D
• Caterpillar Challenger 75E
• Caterpillar Challenger 85C
• Caterpillar Challenger 85D
• Caterpillar Challenger 85E
• Caterpillar Challenger 95E

The listed fitment applies to Caterpillar Challenger equipment in the model series specified above. Model identification should be checked against the machine parts documentation before installation because the component is assigned to particular equipment applications.

Cross-reference numbers

• 8M4389 — Caterpillar equipment part number and product SKU
• 5R1427 — associated kit or reference number listed with 8M4389

The number 8M4389 identifies the silicone O-ring supplied for the listed Caterpillar applications. The reference 5R1427 is associated with the 8M4389 preformed part listing.

Specifications

The dimensions and weight above are the values provided for the 8M4389 part listing. The available data identifies the component as a silicone preformed O-ring but does not specify the exact assembly position, sealing circuit, or installation quantity.