CATEngine Parts

272-5767 Seltec Tm 21Hx A — Cat 450E

This is a Seltec TM 21HX A compressor, a critical component for the air conditioning system in heavy machinery. It is manufactured to meet stringent OEM quality standards, ensuring superior performance and durability compared to worn or failing units. Symptoms of a failing compressor include a lack of cold air, unusual noises from the AC system, or intermittent cooling.

Seltec Tm 21Hx A – Part No 272-5767 – CAT Spare Part
Part Specifications
BrandCAT
CategoryEngine 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

Inspect mating surfaces for wear before fitting. Use torque specs from service manual. Replace gaskets and seals as a set — reusing compressed gaskets causes oil leaks. Clean all oil passages with compressed air.

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

Part TypeAir Conditioning Compressor
MaterialAluminum alloy, steel, rubber seals
ApplicationAir conditioning system
Service LifeReplace as needed based on performance
CompatibilityOEM specification
ConditionNew — OEM specification aftermarket

Failure Symptoms

The most common initial symptom of a failing AC compressor is a noticeable decrease in cooling efficiency or complete loss of cold air. If ignored, the compressor may begin to make loud, grinding noises, and the AC system's performance will continue to degrade. Continued operation with a failing compressor can lead to damage to other AC system components, necessitating more extensive and costly repairs.

Installation Tip

Ensure the AC system is properly evacuated and flushed before installing the new compressor to remove any debris or moisture. Avoid overtightening the compressor mounting bolts, as this can distort the housing and lead to premature failure.

Service Note

Always replace the receiver-drier and expansion valve when replacing the AC compressor to ensure system cleanliness and proper operation.