3E1906 Compressor for Caterpillar

3E1906 is an HVAC compressor used in Caterpillar heavy equipment operator cab systems. The component is intended for systems that circulate refrigerant for cab cooling and that use fresh-air or recirculated-air operating modes. This is a new aftermarket spare part manufactured by CTP (Costex Tractor Parts).

The compressor is configured as a seven-cylinder unit with a die-cast aluminum housing. It is used as part of the cab HVAC assembly and is driven by an A-type, toothless belt. The clutch operates at 24 V, and the compressor is specified for systems using R134a refrigerant.

The supplied configuration is intended only for HVAC systems equipped with a high-side shut-off switch. The available wiring harness configuration uses a two-pin DT connector. The recommended operating speed is 2500 ± 200 rpm, while the maximum rotation speed is 4000 rpm.

Cross-reference numbers

• 3E1906
• 3E-1906

These number formats identify the same compressor reference. The specific Caterpillar machine model or series is not provided in the available product data, so compatibility should be checked against the equipment parts documentation and the configuration of the installed HVAC system.

Specifications