Service - Displacement Pump - Graco Bulldog Hydra-Cat Series Instructions And Parts List

Service – Displacement Pump
WARNING
INJECTION HAZARD
To reduce the risk of serious injury,
follow the Pressure Relief Procedure
on page 19 whenever you are instructed
to relieve the pressure.
Removal and Replacement
Thoroughly flush the system with a solvent which is
compatible to the fluid being pumped, then follow the
Pressure Relief Procedure on page 19. The Flushing
procedure is on page 17.
Stop the pump at the bottom of its stroke.
CAUTION
If you are changing to a different type of fluid, com-
pletely clean all of the equipment and hoses, making
sure that no fluid remains in any part of the system.
Remove the fluid outlet hoses from the displacement
pumps.
1. For Two Displacement Pump Models Only
Unscrew the swivel unions (33) from the bottom of
the displacement pumps. See Fig. 20.
2. For Three Displacement Pump Models Only
Unscrew the swivel union (33) from the bottom of
the center displacement pump. Unscrew the swivel
unions (126) from the outer displacement pumps.
Remove the supply manifold (125) from the outer
pumps. Unscrew the straight union (39) from the
center displacement pump. See Fig. 21.
26 308225
1. Unscrew the swivel union (33) from the bottom of
the center displacement pump. Unscrew the swivel
unions (126) from the outer displacement pumps.
Remove the supply manifold (125) from the outer
pumps. Unscrew the straight union (39) from the
center displacement pump. See Fig. 21.
33
Fig. 20
41
39
Fig. 21
33
125
126
33