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Displacement Pump
310813 Rev C 15
Installation
1. Fig. FIG. 17. Pull piston rod out. Screw in pump until holes
in connecting rod and piston rod align.
FIG. 17
2. FIG. 11. Push pin (8) into hole. Push retaining ring spring
into groove all the way around connecting rod.
3.
FIG. 18
. 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 (
FIG. 19
). 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 (93).
FIG. 18
4. FIG. 19. Fill packing nut with Graco TSL until fluid flows
onto the top of seal. Install pail hook (9).
FIG. 19
WARNING
If pin works loose, parts could break off and project
through the air and result in serious injury or property
damage. Make sure pin is properly installed.
CAUTION
• Replacement pump comes with an outlet fitting
installed. Replace installed fitting with fitting marked
“GMAX 3400”.
• 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.
WLD
WLD
WLD
WLD
WLD
Drive housing face