Stellar Industries 21140 Oil Cooler Assembly for RS4540 and SRS40 – Replaced by

If you’re unsure whether this part is compatible with your truck or equipment, please contact us to confirm fitment before purchasing.

The Stellar Industries 21140 Oil Cooler Assembly is designed for compatible RS4540 and SRS40 rotary-screw air compressor systems. It removes heat from the compressor oil to help maintain proper operating temperature and dependable compressor performance.

Part number 21140 has been replaced by Stellar oil cooler kit 143669. Order kit 143669 when servicing equipment that originally used the 21140 cooler assembly.

What This Part Is Used For

This oil cooler transfers heat away from the circulating compressor oil on compatible Stellar RS4540 and SRS40 systems. Proper oil cooling protects internal compressor components and helps prevent overheating during operation.

Common Reasons For Replacement

Compressor oil temperature is excessively high
Oil leaking from the cooler core
Cooler fins are bent, clogged, or damaged
Reduced cooling performance
Cracked or corroded cooler assembly
Compressor repeatedly shuts down from overheating
Cooler damaged by vibration or impact

Key Features

Original Stellar Industries part number 21140
Replacement is Stellar kit 143669
Designed for RS4540 and SRS40 compressors
Helps regulate compressor oil temperature
Protects against heat-related compressor damage
Supports consistent air-compressor performance
Complete service replacement kit available