TM 5-3810-307-24-1-2
Inspect the upper part of the unloader valve cap where the
rectangular vee seal operates. Check for scoring.
Inspect the valve seat surfaces.
NOTE
Inspection of the valve seats in the valve
plate requires specialized equipment and is
beyond the scope of field service.
If the valve seat is visibly damaged, or cannot be cleaned,
a new valve plate is available in a service kit. Otherwise,
a QE valve plate service assembly can be used.
Gasket sealing surfaces must be clean and free of all old
gasket material, carbon, rust, and other buildup. Surfaces
must be free of scratches, gouges, burrs, and other
deformities.
After making sure all gasket surfaces are clean and free of
the above, inspect the head and cover for flatness. Use
the flat plate and the feeler gauges.
12-24 Change-1
