Displacement Pump
3A4587D Operation, Repair, Parts 25
Installation
1. Pull piston rod out distance shown. Screw in pump
until holes in connecting rod and piston rod align.
2. Push pin (31) into hole. Push retaining ring spring
into groove all the way around connecting rod.
3. Screw jam nut down onto pump until nut stops.
Screw pump up into drive housing until top threads
of pump are flush with drive housing face. Back off
pump and jam nut to align pump outlet to side.
Tighten jam nut by hand, then tap 1/8 to 1/4 turn
with a 20 oz (maximum) hammer to approximately
75 ±5 ft-lb (102 N·m). Connect hose (118) and suc-
tion hose (57).
4. Fill packing nut with TSL until fluid flows onto the top
of seal. Install pump rod cover (107).
If pin works loose, parts could break off due to force
of pumping action. Parts could project through the air
and result in serious injury or property damage. Make
sure pin and retaining spring are properly installed.
NOTICE
If the pump jam nut loosens during operation, the
threads of the bearing housing and drive train will be
damaged. Tighten jam nut as specified.
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