Transmission oil pump 20/925327 JCB, genuine

Transmission oil pump 20/925327 is a genuine JCB part for the JCB machines.

The transmission pump directly decides whether the machine can move: in a powershift gearbox with a dead pump no gear engages and the machine will not drive. The pump body and gears are precision-machined, and as internal clearances grow the pump can no longer hold pressure, especially with hot, thin oil. A pump with the dimensions and connections of its part number fits the gearbox without modification. Pump pressure is measured with both cold and hot oil; a big difference between them indicates internal leakage. A blocked strainer on the suction side soon wears even a sound pump through cavitation, so the strainer is cleaned or replaced when a new pump is fitted. Air drawn in through a loose suction connection causes similar damage.

Specifications

Compatibility

According to the product card, 20/925327 is a transmission oil pump. Fit is confirmed by the part number. The catalogue also has the aftermarket version and OEM version of this part. Other parts are in Transmission.

Fitting

The pump is removed by separating the gearbox from the engine or opening the gearbox cover; clean the mating faces and use a new gasket or O-ring. Align the pump drive with the converter hub and tighten the bolts in a cross pattern to the specified torque. After assembly, top up the transmission oil, run the engine at idle to let the pump prime, then measure the line and clutch pressures with a gauge. Check for leaks and unusual noise.