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.
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.
TO REASSEMBLE PROCEED AS FOLLOWS:
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).
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!
