Displacement Pump Repair - Graco GM 3000 Instructions-Parts List Manual

Displacement Pump Repair
INJECTION HAZARD
To reduce the risk of serious injury,
whenever you are instructed to relieve
pressure, follow the Pressure
Relief
NOTE: Packing Repair Kit 23-92
is available.
Reference numbers of parts included in the kit are
marked with an asterisk, i.e., (121'). For the best
results, use all the new parts in the kit, even if the old
ones still
look
good.
NOTE: To minimize down time, and for the best sprayer
performance, clean the transducer (see page 20) when-
ever you repack the pump. Replace these parts as need-
'
ed.
Removing
the
pump
(See Fig. 24.)
1. Flush the pump, if possible. Relieve pressure. Stop
f.'
the pump with the piston rod (107) in its lowest
position, if possible.
2. Remove the filter (21).
3. Remove suction hose or tube (40).(FOr suction
hose, refer to page 21.
NOTE If repairing only the intake valve assembly, go
to Intake valve repair, page
34.
4. Use a screwdriver to push the retaining spring (12)
up and push out the pin (11).
5.
Loosen the screws (17). Remove the pump (18).
39 Model 231-363
Shown
Fig.
24
"4
32 308-620