The diagram clearly shows torque sequence and values. Uneven tie rod torque distorts the cylinder bore, leading to rapid seal failure.

The HM25 accepts standard 75mm hexagon tool steel (e.g., moil, chisel, blunt). The parts diagram will list:

Contact your local JCB dealer with your hammer’s serial number (stamped on the cylinder body). They can provide the latest revision of the JCB HM25 parts diagram and verify if any engineering updates apply to your machine.