Trouble shooting HD 1050
16
Replace the O-ring set of the piston and the
O-ring set of the bushing, greasing the new
parts with silicon grease before fitting.
Caution: Be sure to insert the parts in the
correct order.
Secure the new piston to the rod with Loctite
(No. 6.869-028).
3.4 Checking the valve seat
Remove the complete relief valve.
Unscrew the screw plug.
Check the spring and ball for wear and replace
them if necessary.
Drive out the valve seat with a punch, check its
condition and replace it if necessary, also the
O-ring.
When replacing the valve seat, drive it in to the
stop, do not damage it.
Tighten the screw plug with a torque of 20 Nm.
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