Trouble shooting HD 1050
12
2.6 Functional faults in relief valve
Safety valve pulsating (repeatedly opens and
closes with the hand gun closed).
Remove the pressure gauge and valve screw.
Pull out the pressure holding valve with pliers
(special tool).
Check the valve seat and valve plate for wear,
if needed, replace the complete valve.
When installing the valve screw, tighten it with a
torque of 50 Nm.
Dismantle the relief valve completly.
Remove the O-ring sets from the piston.
Grease the new O-ring sets with silicon grease
and then install them.
Caution: Be sure to install in the correct order.
When reassembling the relief valve, tighten it to
a torque of 30 Nm.
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