Graco 231-033 Instructions-Parts List Manual page 29

WARNING
To reduce the risk of serious injury, follow the illus-
trated Pressure Relief Procedure
page 24 whenever you are instructed to relieve
pressure.
NOTE: Read the GENERAL REP AIR INFORMATION
on page 24 before doing this procedure.
NOTE: Refer to Fig 29–1 for this procedure.
1. Relieve pressure.
2. Disconnect the fluid outlet hoses. Disconnect the
hose (70) between the pump and pressure control.
3. Loosen the filter bracket nut (38).
4. Hold the hex of the pressure control adapter (341)
firmly with a 3/4" open end wrench. Use an adjust-
able wrench to unscrew the swivel union (39), and
then remove the fluid filter (66).
5. Remove the pressure control cover (63). Disconnect
the four motor leads. See Fig 28–2.
6. Remove the circuit board and retain it. See page 28.
10
11
38
12
Fig 29–1
PRESSURE CONTROL REPLACEMENT
warning on
7. Remove the conduit (1).
8. Remove the three pressure control mounting screws
(8), lockwashers (10) and nuts (1 1). Remove the
pressure control.
9. Remove the screws (22) and back mounting bracket
(64).
CAUTION
Do not allow the adapter (341) to turn while installing
the new pressure control assembly . Turning it can
damage the sensitive bourdon tube. Hold the
adapter firmly with a 3/4" open end wrench while
screwing in the swivel union (39).
10. Install the new pressure control assembly in the re-
verse order of disassembly . Reinstall the conduit
seal (29) around the wires in the conduit connector
(345) to prevent motor contamination from entering
the control. See the DETAIL below.
PRESSURE CONTROL ADJUST-
11. Perform the
MENT, page 30, before regular operation of
sprayer.
22
64
36,63
8
345
1
341
344
70
39
CAUTION
Do not allow the adapter
(341) to turn at any time.
the
DETAIL
Shows position of conduit
seal (29) in conduit connec-
tor (345)
29
345