Pressure Control Replacement - Graco GM3500 Instructions-Parts List Manual

Pressure Control Replacement

WARNING
INJECTION HAZARD
To reduce the risk of serious injury,
whenever you are instructed to relieve
pressure, follow the Pressure Relief
Procedure on page 12.
1. Relieve pressure.
2. Disconnect the pressure control while holding the
fitting or elbow (A) firmly. See the CAUTION,
below. See Fig. 7.
CAUTION
Do not allow the elbow or fitting (A) to turn when
removing or connecting the hoses. Turning the
fitting or elbow can shift the calibration of the pres-
sure control.
3. Remove the four mounting screws and washers
(302, 303, 304) from the pressure control cover
(76). See Fig. 8.
4. Carefully remove the pressure control cover (76)
so as not to stress the cables.
5. Disconnect the black and white wires of the pres-
sure control cable (314) from the pressure control
cover.
6. Disconnect the potentiometer cable assembly
(310) from the pressure control cover.
7. Disconnect the red power lead (B) from the
ON/OFF switch.
8. Loosen the ground terminal screw (317) and
disconnect the ground lead (C).
9. Pull off the pressure control cover.
76
A
To the pump.
To the filter.
Fig. 7
310
317
C
B
76
304
302
304
303
Fig. 8
WARNING
Do not attempt to adjust or calibrate the pressure
control. If the pressure control is faulty, replace it.
10. Reassemble in the reverse order; attach ground
wire (C), power lead (B), and the black and white
connectors. Attach the pressure control cover (76)
using the four mounting screws and washers (302,
303, 304).
59
TO
FIL-
A
TER
06873
06873
314
06872A