20
English 5.906-565.0 Rev. 00 (12/12)
1 Valve screw
2 Valve
3 O ring
4 Screwed sealing plug
Unscrew the valve screws.
Remove the valve and O-ring.
Insert a new O-ring in the drilled hole.
Insert a new valve.
Check the O-ring of the valve screw, replace if
necessary.
Insert and tighten the valve screw (torque 40...45
Nm).
Unscrew the connecting piece.
Remove the check valve.
1 O ring
2 Valve body
3 Spring
Check the valve body, spring and O-ring.
Check the valve seat in the cylinder head.
Replace defect parts
Reassemble the valve.
7.9
Replacing the valves
7.10 Checking the pressure retaining valve
