CATBrake Parts

6i8911 Disc-Friction — Cat 120H 120H ES

This friction disc is an essential element within the brake or transmission system, providing the necessary friction surface for engaging and disengaging power. Manufactured to exacting standards, it ensures smooth operation and durability, unlike a worn disc that can cause slippage or overheating. Operators may observe erratic shifting, loss of power, or a burning smell when this component begins to fail.

Disc-Friction – Part No 6i8911 – CAT Spare Part
Part Specifications
BrandCAT
CategoryBrake Parts
ConditionAftermarket — OEM Specification
DispatchSame-day from Mumbai (before 3 PM IST)
GST InvoiceAvailable — all orders
Export DocsCommercial invoice, packing list, COO

Compatible Models

Always verify with serial number before ordering.

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Installation & Application Notes

Always replace brakes in axle sets. Bed-in new brake pads with 8–10 moderate stops from 40 km/h. Check disc runout with a dial gauge — maximum 0.1 mm. Inspect caliper slides and pistons when replacing pads.

Always consult the OEM service manual for model-specific torque values and procedures. WhatsApp our technical team if you need fitment guidance.

Part TypeFriction Disc
MaterialFriction Material, Steel
ApplicationBrake or Transmission System
Service LifeReplace based on wear inspection
CompatibilityOEM specification
ConditionNew — OEM specification aftermarket

Failure Symptoms

Early signs of a worn friction disc include a grabbing or chattering sensation during engagement, or a slight delay in power transfer. If ignored, the disc will continue to wear, leading to increased slippage, overheating, and a potential burning smell. Continued operation with a failing friction disc can cause significant damage to other transmission or brake components.

Installation Tip

Ensure all mating surfaces are perfectly clean and free of any oil or grease before assembly. Improperly seating the disc can lead to uneven wear and premature failure.

Service Note

Inspect all clutch plates, seals, and hydraulic fluid for contamination or degradation when replacing friction discs.