by pushing down on first one edge and then the opposite
edge of the wear plate in a rocking motion. If any
looseness is felt, remove cam plate and completely clean
and compressed air dry both the cam (12) and wear
plate (20) to remove any foreign particles from beneath
wear plate. Reposition wear plate in came (12) and
repeat above procedure. If wear plate (20) refuses to
seat properly, check plate for flatness and replace if
Installing shaft seal retainer
7. If trunnion bearings (23) were removed from cam
(12) during disassembly, install new trunnion bearings
(23) using an arbor press and a 11/2 inch plug, pressing
against the lettered side of the trunnion bearing. It is
extremely important that the bearing be started straight
into the bore. If the bearing cocks at any time during
assembly, remove and discard the bearing. Support the
Installing cam wear plate
cam lug on the under side to avoid bending the lug.
Outer face of trunnion bearing (23) should be pressed
10. With a push-pull motion, check for free play between
flush with outer face of cam (12).
bronze shoe and steel piston body. If any play can be
felt, the piston must be discarded. Inspect bronze piston
8. Examine wear plate (20).
shoes (18). During normal service, a dulling of the
burnished on the surface of the cam plate are normal. If
running surface is to be expected. If large scratches,
circular patterns on the wear plate are extensive and can
that can be felt with a fingernail, are present, see
be felt with the fingernail, or if angular scratches are
Fig.135, make several short passes over 500 grit emery
evident, the plate must be discarded. See Fig. 133.
paper on a lap surface.
Inspecting cam reaction plate
Inspecting piston shoe
9. Match up dowl pin (34) in cam (12) with dowel pin
hole in wear plate (20) and seat wear plate (20) in
ON THE LAST FEW PASSES, PLACE 5-6 SHEETS OF
EMERY PAPER AS A CUSHION UNDER THE TOP
SHARPNESS. Check the reworked piston shoe (18)