13
26. Replace the front portion of the connecting rod (20) and plunger rod/ crosshead assembly (22) by press-fitting
the crosshead pin (23). Make sure to insert the beveled edge of the crosshead pin into crosshead. If the
crosshead has a mark, install pin from marked side.
The crosshead pin (23) should not extend beyond
either side of the crosshead (22) in order to prevent damage to the crosshead bore of the crankcase (1).
27. Place each crosshead/ plunger assembly into the pump making sure that all of the parts are well oiled before
insertion into the crankcase (1).
Notice that the connecting rod (20) halves are numbered or colored.
Connecting rods must be positioned with their numbers or colors on the upper left-hand side, in the
same numerical sequence as when they were removed.
28. Replace near side bearing (15) on crankshaft by using the Giant Bearing Tool and mallet to tap into place.
Take the crankshaft (18) end with the bearing (15) and insert the other end through the bearing housing and
tap with a rubber mallet until the bearing is seated.
29. When reassembling the connecting rods (20), note that the connecting rod halves are numbered or colored
and that the numbers or colors must be matched and aligned. Torque the connecting rod bolts to 125-150 in.-
lbs.
30. Insert the near side crankshaft oil seal (14) with the Giant Bearing Tool making sure it is firmly seated and
well oiled. Replace the bearing cover (12) and o-ring (13) and tighten securely.
See instructions above for re-installing fluid end onto the gear end.
31. Fill the P55W / P56W crankcase (1) with 14 oz. of Giant Industries’ oil and check the oil level with the
dipstick (5). Proper level is center of two lines. Reinstall the pump into your system.
