VolvoCooling System

20721587 Sd Compressor — Volvo FH12 FH16

This SD compressor is essential for generating the compressed air required for the vehicle's braking system and other pneumatic functions. Built to strict quality benchmarks, it ensures consistent air production, unlike a worn unit that may exhibit reduced output or air leaks. Operators may notice prolonged air pressure build-up times, audible air leaks, or frequent compressor cycling when this component begins to fail.

Sd Compressor – Part No 20721587 – Volvo Spare Part
Part Specifications
BrandVolvo
CategoryCooling System
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

Flush cooling system with distilled water before refilling. Use pre-mixed coolant — never plain water, which causes corrosion. Pressure-test system after any cooling repair. Check thermostat by immersing in hot water — should open at rated temperature.

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

Part TypeAir Compressor
MaterialCast Iron, Steel, Aluminum
ApplicationAir Brake System
Service LifeReplace every 5,000 hrs or 5 years
CompatibilityVolvo FH12, FH16, FH 420, FH 460, FH 500
ConditionNew — OEM specification aftermarket

Failure Symptoms

Initial signs of a failing SD compressor include slow air pressure build-up or the compressor running constantly without reaching full pressure. If ignored, this can lead to insufficient air for braking and potential overheating of the compressor unit. The risk is compromising the air supply for essential safety systems.

Installation Tip

Ensure the air intake line is clean and free of debris before connecting it to the new compressor. Avoid overtightening the compressor mounting bolts, which can distort the housing and cause leaks.

Service Note

Inspect the air governor and air dryer for proper function and replace the air filter element when servicing the SD compressor.