4. Clean the discharge valve seats and bores, then
replace the discharge manifold assembly onto the
cylinders until seated firmly, again being careful
not to pinch the O-rings, Check at both ends of the
cylinders for any part of an O-ring showing. If any
O-ring is visible, it has been cut during assembly
and must be replaced or the pump will leak.
5. Replace the four hex head cap screws and tighten
by hand, then wrench tighten them 1/4 turn at a
time in the following sequence until seated. #1,
is 60 inch-pounds.
6. After pump is reassembled, turn the pulley over a
few turns by hand to make sure all parts are
moving freely.
DISCHARGE VALVES
Remove the discharge manifold as per instructions in
Piston Replacement section. Use the Valve Extractor
tool, Part 1190-49-05, as shown in Pictures 5 and 6,
to remove the discharge valve seat, then remove the
discharge valve poppet and spring. If the seat of the
discharge valve is worn until it no longer seals, replace
it. The same is true of the face of the poppet. Clean
the spring and poppet. Insert one end of the spring
into the discharge manifold and, with a turning
motion, press it down over the boss at the bottom of
the bore until it is firmly seated, Make sure the spring
is centered in the bore and place the poppet over the
upper end of the spring. The poppet should now be
centered in the bore. Replace the discharge valve seat
O-ring. Coat the O-ring with a film of oil and, using
both thumbs, push the discharge valve seat into the
bore until it bottoms. Replace the discharge manifold
on the cylinders and tighten the four bolts according
to the previous instructions.
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