Pressure Control Replacement - Graco EM 5000 Instructions-Parts List Manual

Pressure Control Replacement

WARNING
To reduce the risk of serious injury, including fluid
injection or splashing in the eyes or on the skin, or
injury from moving parts, always follow the Pres-
sure Relief Procedure Warning on page 6
before checking, adjusting, cleaning, or shutting of
the sprayer. Unplug the power supply cord!
1. Disconnect both hoses (59) at the pressure control
(63). Hold the hex of the nipple (304) firmly with a
wrench to prevent turning the elbow (303). Take note
of the original location of each hose to be sure you
reassemble them correctly at the end of this proce-
dure. See Fig 13.
CAUTION
Do not allow the elbow (303) to turn when removing
or connecting the hoses. Turning the elbows can
damage the sensitive bourdon tube in the pressure
control box.
2. Remove the pressure control cover (76). Disconnect
the + and – leads from the rectifier (310). These
leads go to the clutch field. Disconnect the five motor
leads. These leads go through the conduit to the mo-
tor. See Fig. 15.
3. Remove the three nuts (61) and lockwashers (9)
from the capscrews (62). See Fig 14.
4. Unscrew the nut on the conduit elbow (308). Careful-
ly guide the wires through the elbow as you pull the
conduit (94) away from the pressure control.
5. Reassemble. Perform the PRESSURE CONTROL
CALIBRATION PROCEDURE on page 17 before
regular operation of the sprayer.
323
– LEAD
+ LEAD
310
Fig. 15
76
303
304
59
Fig. 13
63
308
VIEW FROM UNDER ENGINE MOUNTING
Fig. 14
MOTOR LEADS
63
302
320
90
90
62, 9, 61
1
87
94
90