7
11. If previously disassembled thoroughly clean all exposed surfaces on the
spacer (29E) and all exposed threads on the plunger bolt (29C) and the
steel plunger base (25). Threads MUST be free of old loc-tite and any
other material such as oil, grease, etc. This is necessary to ensure proper
curing of new loc-tite. Giant recommends cleaning the threads with
acetone or other suitable cleaner. Reassemble plunger assembly parts
(29A, 29B, & 29E) using a new copper gasket (29D) and the cleaned
plunger bolt (29C). Slide the bolt through the center of the four (4) pieces
so that the threaded end is exposed. Apply several drops of loc-tite 243
(or equivalent) adhesive to the threads. Thread into steel plunger base and
tighten to 26 ft.-lbs. BE CERTAIN ALL PARTS ARE CENTERED
WITH THE BOLT!
7. For LP122A & LP122A-4000
pumps, oil seal replacement
can be accomplished by pull-
ing the retainer forward out of
the crankcase. The o-ring
around the outside of the re-
tainer should be replaced and
lubricated with a light film of
oil.
10. For LP122A & LP122A-4000
pumps, generously lubricate the
inside of the oil seals (31A &
33) and o-ring (32A). Next,
place the seal retainer, complete
(31) over the steel plunger base
seat firmly into the crankcase.
Replace the flinger (30).
TO REASSEMBLE PROCEED AS FOLLOWS:
29E 29A
29B
29D
29C
8. The back-up seal (33) can be
pried out of the back of the
retainer (32) with a small
screwdriver. To replace with
new seal, lubricate edges of
new seal, then squeeze out-
side edges of seal, forcing the
seal to collapse into a figure 8.
Tuck the two outside edges of
the figure 8 into the rear of the
retainer, making sure that the
inner lip of the seal faces the
oil. The seal may now be
pressed firmly into place.
9. The front oil seal (31A) can
now be removed by inserting a
screwdriver through the rear
of the retainer and tapping the
seal out through the front of
the retainer. Remove any ex-
cess old loc-tite from retainer.
To replace oil seal, apply a
light film of loc-tite around
outside edges of seal. Tap seal
firmly into the retainer with a
wooden dowel making certain
that the spring side of the seal
is installed first and that the
seal sits squarely in the re-
tainer.
LP122A Series/LP123/LP255 - Repair Instructions
