REPAIR INSTRUCTION - P200A-3100/5100 SERIES
Disassembly sequence of fluid end of
Note: Always take time to lubricate all metal and nonmetal parts with a light film of oil before reassem- bly. This step will ensure proper fit, at the same time protecting the pump nonmetal parts (i.e., the elastomers) from cutting and scoring.
1)With a 22mm socket wrench, remove the (3) discharge valve plugs and (3) inlet valve plugs (32). Inspect the
2)Using a needle nose pliers, remove the inlet and discharge valve assemblies (32X). By inserting a small screw driver between the valve seat (27) and the valve spring retainer (30), the valve assembly can be separated. Remove the
3)Next, use a 5mm allen wrench to remove the 8 socket head cap screws (34). Carefully slide the valve casing (26) out over the plungers. Remove the weep return ring (25), pressure ring (24), and
4)Check surfaces of plunger (16). A damaged surface will cause accelerated wear on the seals. Deposits of any kind must be carefully removed from the plunger surface. A damaged plunger must be re- placed!
5)If the ceramic plunger pipe (16B) is damaged, remove the plunger bolt (16C). Discard the old plunger pipe (16B) and copper gasket (16D), and clean the old locktite from the plunger bolt (16C) and plunger base (16A). Replace the plunger with the new one and locktite the plunger bolt and torque to 120
Note: If there are deposits of any kind (i.e., lime deposits) in the valve casing, be certain that the weep holes in the weep return ring (25) and valve casing (26) have not been plugged.
5)If the crankcase oil seals (19) are to be replaced, they can be removed by prying loose with a flat screwdriver. Take care not to make contact with the plunger. If the oil seals are not to be replaced, proceed to the back end disassembly sequence and carefully pry the seals loose after the plungers have been removed from the crankcase. The seals should not be reinstalled until after step #2 of the "Reas- sembly Sequence".
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