1838403 Charge Pump Fits Caterpillar Models

One New Aftermarket Replacement Charge Pump for Caterpillar (Cat) D8R Track-Type Tractors, 583T Pipelayer, and Industrial Tractors

This aftermarket replacement charge pump (PUMP GP-CHARGE) supplies pressurized hydraulic fluid to the hydrostatic drive and steering systems on Caterpillar D8R track-type tractors, the 583T pipelayer, and HA871/TK371 industrial tractors. The charge pump maintains circuit pressure at the inlet of the main piston pump, preventing cavitation and ensuring consistent hydraulic performance. Approximate weight: 11 lb (5 kg).

Compatible Models

Caterpillar Track-Type Tractors: D8R (RJM00001-UP, T5X00001-UP, MEJ00001-UP - powered by 3406C Engine; AKA00001-UP - Differential Steering, powered by 3406E Engine), D8R Series II (6YZ00001-UP - powered by 3406E Engine)

Caterpillar Pipelayers: 583T (CMX00001-UP - powered by C15 Engine)

Caterpillar Industrial Tractors: HA771, HA871 (HAG00001-UP), TK371 (WBG00001-UP - powered by 3126 Engine)

Also listed as compatible: 57H

Note: Verify serial number prefix against the ranges listed above before ordering. This is a hydraulic system component - incorrect fitment can result in pump cavitation or system damage.

Replaces Part Number(s):

1838403, 183-8403

Aftermarket Interchange Numbers

CA1838403

New aftermarket replacement part - not remanufactured, not used.