CATBrake Parts

4S9073 Disc A — Cat D8H D8K

This friction disc is a vital component within the transmission or brake system, designed to transmit torque or provide stopping power through friction. Manufactured to precise tolerances, it offers consistent engagement and wear characteristics superior to a worn or glazed disc. Operators might experience slipping under load, delayed engagement, or a gradual loss of braking power when this friction disc is compromised.

Disc A – Part No 4S9073 – 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 on steel plate
ApplicationTransmission or brake system
Service LifeReplace as needed based on wear
CompatibilityOEM specification
ConditionNew — OEM specification aftermarket

Failure Symptoms

The first sign of a worn friction disc is often a slight shudder or hesitation during gear changes or braking application. If ignored, the disc will continue to wear, leading to increased slippage, overheating of the clutch or brake pack, and a significant reduction in operational control. Continued use with a failing friction disc can cause damage to other transmission or brake components.

Installation Tip

Ensure all mating surfaces are clean and free of debris before assembly to guarantee proper engagement. Avoid mixing old and new friction discs if replacing a set, as wear rates can differ.

Service Note

Inspect clutch plates, seals, and transmission fluid or brake fluid for contamination or wear when replacing this friction disc.