Bucket cylinder 331/32602 JCB JS, aftermarket

For the JCB JS crawler excavators: bucket cylinder 331/32602, an aftermarket part. The card also lists 332/J8010.

The bore and rod diameters, stroke and mounting eyes of a cylinder are set by the machine, so the cylinder is chosen by part number and compared with the old one. When comparing, check the closed length between eyes, the stroke, the position and threads of the ports and the pipes on the barrel. Internal leakage can be checked by driving the cylinder to the end of its stroke and holding it under pressure: if it keeps moving under load, suspect the piston seal or the relief valve in the control valve. A leaking rod seal shows as an oil ring and caked dust on the rod. The aftermarket cylinder comes painted, with a hard-chromed rod and capped ports; remove the caps only just before connecting the hoses so no dirt gets in. The cylinder's pipes and hose unions are protected in transit; take care not to bend them during fitting. The cylinder is chosen by part number.

Specifications

Compatibility

The cylinder curls and dumps the bucket of the crawler excavator. Other parts are in JCB hydraulic cylinders.

Fitting

After the first hours of work, recheck the pin retainers and hose joints, and keep to the hydraulic filter service intervals. When connecting the hoses, renew the sealing rings and tighten the unions to the specified torque.