CATBrake Parts

3S7981 Disc Assem — Cat 12F 14E

This disc assembly is a critical friction component within the transmission or brake system, designed to engage and transmit power or apply braking force. Manufactured to strict tolerances, it ensures smooth engagement and reliable performance, unlike a worn or glazed disc that can cause slipping or reduced braking effectiveness. Operators may experience delayed engagement, shuddering during operation, or a noticeable decrease in the machine's ability to accelerate or stop if this assembly is failing.

Disc Assem – Part No 3S7981 – 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 TypeDisc Assembly
MaterialFriction Material, Steel
ApplicationTransmission or Brake System
Service LifeReplace as part of transmission or brake overhaul
CompatibilityCAT 12F, 14E, 518, 518c, 528
ConditionNew — OEM specification aftermarket

Failure Symptoms

A primary symptom of a failing disc assembly is noticeable slippage during acceleration or a delay in power engagement. If ignored, this can lead to overheating of the transmission or brake system and accelerated wear on other related components. Continued operation with a worn disc assembly risks severe damage to the entire drivetrain or braking system.

Installation Tip

Ensure all friction surfaces are clean and free from grease or oil before installation to guarantee proper engagement. Do not mix old and new plates; replace the entire set as specified for the assembly.

Service Note

When replacing the disc assembly, inspect the transmission fluid or brake fluid for metal particles, which can indicate wear on other internal components.