SERVICE TRAINING
Service Manual
17
Rock Valve
Inlet Housing Lining
Cutting Ring
A
Rock Valve
Pressure Spring
3. Checking the distance between the Cutting
Ring and the Rock Valve after each turn of
the Cutting Ring. If it exceeds 8 mm. (.31”),
the pretension of the Pressure Spring is not
enough to correctly press the Cutting Ring to
the inlet side of the Housing Lining, and the
Cutting Ring should be changed.
Replacement of Spectacle
Plate
Check the plate for wear, and if replacement is
necessary, follow these steps:
1. Loosen the bolt on the Pivot Lever a few
turns with a 30 mm. wrench.