Repair
3A0732B 15
Repair
General Information
• Reference numbers and letters in parentheses in
the text refer to the callouts in the figures and the
parts drawing.
• Always use Genuine Graco Parts and Accessories,
available from your Graco distributor. If you supply
your own accessories, be sure they are adequately
sized and pressure rated for your system.
Disconnect the Displacement
Pump
1. Stop the pump.
2. Flush the pump, if possible (see page 13). Follow
Pressure Relief Procedure, page 10.
3. Disconnect the air hose, fluid hose, and suction
hose.
4. See F
IG. 6. Push the safety spring (9) down and
hold to access the coupling pin (18). Push the
retaining spring (19) up and push out the pin, using
a screwdriver or punch.
5. Loosen the jam nut (13).
6. Unscrew the displacement pump by hand and place
on work bench.
Reconnect the Displacement
Pump
1. Screw the displacement pump into the adapter plate
(10) until it stops. Back off pump less than 1 turn, to
align pump outlet as desired.
2. Tighten the jam nut (13). Torque to 65-75 ft-lb
(88-102 N•m).
3. Align the hole in the displacement rod with the hole
in the air motor rod. Use a screwdriver to push in the
pin (18).
4. Push the retaining spring (19) into place to cover the
pin.
5. Fill throat packing nut wet-cup with TSL to prevent
premature packing wear.
FIG. 6. Safety Spring and Connecting Pin
NOTICE
The displacement pump can be damaged if the stroke
is not centered when the pump is reconnected. Be
sure to fully screw the displacement pump into the
adapter plate (10).
19
9
18
TI16261A
13
10
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