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Disassembly sequence of the
back
end of the P200A-3100/5100 series
pump.
1) Before you begin, drain the oil from the crankcase.
2) Remove the crankcase cover (3) and o-ring (4) from the crankcase (1). To remove the crankshaft (13),
remove the bearing cover (7) and sight glass (8). Using a rubber mallet, remove the crankshaft axially
through the connecting rods by tapping on the end of the shaft. Be careful not to bend or damage the
connecting rods during crankshaft removal.
3) If the bearings (12A and 12B) and radial shaft seal (11) are still in the crankcase, remove them. Inspect
both bearings and seal for wear and replace if necessary.
4) Remove the connecting rod (15) and plunger (16). Remove the wrist pin (17) if necessary. Check the
plunger bore in the crankcase for wear. Inspect parts and replace as necessary.
5) Should you find it necessary to service the plunger assembly (#16) you can do so by removing the
tension screw (#16D). Inspect all parts and replace as necessary.
Reassembly sequence of the of the P200A-3100/5100 series pump
1) Reassemble plunger (16) and the connecting rod (15) with wrist pin (17). Place assemblies in crankcase
(1). Install crankshaft through connecting rods again being careful not to bend or otherwise damage the
connecting rods.
2) Replace left and right side bearings (12A and 12B) if they were removed from the crankshaft. Be
certain the bearings are pressed all the way onto the shaft and completely into the crankcase. Replace
radial shaft seal (11), bearing cover (7), sight glass (8), and crankcase cover (3) with its o-ring (4).
3) If oil seals (19) were removed, replace with seal lip towards crankcase. Lubricate seal before replacing.
4) Replace seal case (20) with o-rings (21) over plungers. Generously lubricate o-rings and oil seal before
reassembly. Replace v-sleeve (23) over plungers (16)..
5) Generously lubricate v-sleeve (23). Assemble v-sleeves (22) into valve casing (#26). Assemble weep
return ring (25) and pressure ring (24) over plungers (16). Slide valve casing over plungers and seat
firmly. Replace the eight socket head cap screws (34) and tighten to 105 inch-pounds in a crossing
pattern.
6) Replace the six o-rings (31) and the six valve assemblies (32X). Now replace the six valve plugs with o-
rings (32 and 33) and tighten securely with a 22mm socket wrench to 33 foot-pounds.
7) Fill crankcase with 9.5 ounces (6.5 ounces for P217A) of oil.
REPAIR INSTRUCTION - P200A-3100/5100 SERIES
NOTE: Contact Giant Industries for Service School Information. Phone: (419)-531-4600