Graco 253361 Series C Heat Pump User Manual


 
Displacement Pump Service
309966H 9
Reassembly
1. Slide piston seal (54) on piston/priming rod (58)
assembly.
2. Screw priming rod (58) assembly onto connecting
rod (57). Align the thru holes as close as possible,
axis-to-axis (F
IG. 3). See endplay Note included in
Step 10, Pump Disassembly instructions (page 8)
for additional assembly instructions.
3. Generously lubricate all parts of the shaft assembly
with a light, water resistant grease.
4. Replace the gasket seal (60) on the pump cylinder
(59). Screw the pump cylinder onto the extension
tube (64).
5. Slide the intake seal (62) onto the priming rod (58)
flat side down.
6. Replace the o-ring (61) on the seal retainer (63).
Slide the seal retainer over the priming rod (58) and
screw into the pump cylinder. Using the seal
retainer torque the entire cylinder assembly to 44-55
ft-lbs (61-75 N.m).
7. Screw the shovel (66) on the priming rod (58).
Screw the shovel tube (67) on the seal retainer (63).
8. If the ground wire was disconnected before servic-
ing, be sure to reconnect it before you operate the
pump.