CATBrake Parts

8Y4139 Lining — Cat

This lining is a critical friction component within the braking system, designed to engage with brake discs or drums to slow or stop the equipment. It is manufactured to meet stringent material and performance standards, ensuring reliable stopping power that surpasses the performance of a worn or glazed lining. Operators may notice a spongy brake pedal, increased stopping distances, or a complete loss of braking effectiveness when this lining begins to fail.

Lining – Part No 8Y4139 – 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 TypeBrake Lining
MaterialHigh-friction composite material
ApplicationBrake system
Service LifeReplace when worn to minimum thickness or showing signs of glazing
CompatibilityOEM specification
ConditionNew — OEM specification aftermarket

Failure Symptoms

Initial signs of a failing lining include a gradual increase in stopping distance or a slight squealing noise during braking. If ignored, the lining will continue to wear, leading to a spongy brake pedal and reduced braking performance. Continued operation with severely worn linings can result in damage to brake discs or drums, requiring more extensive repairs.

Installation Tip

Ensure the brake caliper or wheel cylinder is clean and free of debris before installing new linings. Avoid overtightening brake caliper bolts, as this can distort the mounting surface.

Service Note

Inspect brake discs or drums for scoring, glazing, or warping, and check brake fluid level and condition.