SERVICE TRAINING
Service Manual
16
Rock Valve
Friction
Friction
Friction and
stone crushing
Friction and
stone crushing
Housing Lining
Cutting Ring
max 1.5mm
0.590"
max 1.5mm
0.590"
Cutting Ring
Housing Lining
Spectacle Plate
Lengthening the Service Life
The amount of wear on the Housing Lining and
the Cutting Ring will vary, and it will affect the
length of time they can safely be used. The
condition of each part depends on outside
influences that affect them daily, including
varying concrete mixes and changing weather
conditions. The Cutting Ring and Housing
Lining cannot be expected to wear equally and
will need to be replaced accordingly.
NOTE: The grooves in the Base Plate (Specta-
cle Plate) resulting from basic operation are
irrelevant as long as the hard facing is in good
working condition.
To assist in achieving uniform wear and, thus,
considerably longer service lives, we
recommend:
1. Moving the Rock Valve to the left and right
end positions once a week--after thorough
cleaning--and checking the condition of the
cutting ring & housing lining.
2. Turning the Cutting Ring 90 degrees if there
is a visible space between the Cutting Ring
and the Housing Lining that is greater than
1.0-1.5 mm. (.0393”-.0590”). Check for this
gap at several points along the circumfer-
ence. Instructions for cutting ring can be
found on page 6 of this document.
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