CATBrake Parts

6Y7946 Disc-Friction — Cat 578 D6H

This friction disc is a vital component of the clutch assembly, designed to transmit torque through friction when engaged with other clutch plates. Manufactured to meet CAT's rigorous standards, it offers reliable engagement and extended service life compared to a worn or heat-damaged disc. Operators might experience clutch slippage, difficulty engaging gears, or a burning smell from the clutch area when this part is failing.

Disc-Friction – Part No 6Y7946 – 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
MaterialHigh-density friction material on steel backing
ApplicationClutch system
Service LifeReplace based on operational wear and inspection
CompatibilityOEM specification
ConditionNew — OEM specification aftermarket

Failure Symptoms

The primary symptom of a failing friction disc is a noticeable clutch slippage, where the engine revs higher than expected without a corresponding increase in machine speed. If ignored, this slippage will intensify, potentially leading to overheating of the clutch pack and difficulty in engaging or disengaging gears. Prolonged operation can cause severe damage to other clutch components and the transmission.

Installation Tip

Ensure all mating surfaces, including the flywheel and pressure plate, are clean and free from oil or grease contamination. Do not reuse old pilot bearings or alignment tools if applicable.

Service Note

Inspect the pressure plate, release bearing, and flywheel for signs of wear, heat damage, or warpage when replacing the friction disc.