Pump Repair
333397A
9
Pump Repair
General Information
•
Reference numbers and letters in parentheses in
the text refer to the call-outs in the
Component
Identification
(page 4) and the
Parts
section
•
Always use Genuine Graco Parts and Accessories,
available from your Graco distributor. Accessories
must be adequately sized and pressure rated for
your system.
Disconnect the Displacement
Pump
1.
Flush the pump if possible.
2.
Slowly increase the pot pressure until the pump
begins to move, then quickly lower pressure to stop
the pump in the middle of the stroke.
3.
Perform the
Pressure Relieve Procedure,
page 5.
4.
Disconnect the air and fluid hoses. Remove the
pump from its mounting.
5.
See F
. 11, page 17. Unscrew the tie rod nuts (4)
from the tie rods (3). Unscrew coupler and remove
coupler collars. Carefully pull the displacement
pump (2) off of the air motor.
6.
Note the relative position of the pump fluid outlet (D)
to the air motor air inlet. See F
IG
. 1, page 4.
7.
Refer to page 10 for displacement pump service. To
service the air motor, refer to page 13.
