Pressure Control - Graco B Series Instructions-Parts List Manual

Pressure Control
-
WARNING
. 1
4. Remove the pressure control cover and screws,
Before doing this procedure, follow the Pressure
page 24, remove the circuit board and retain.
injury from moving part.
5.
Refer to CIRCUIT BOARD REPLACEMENT on
jection or splashing in the eyes or on the skin, or
the risk of serious bodily injury, including fluid in-
priate terminals. See Fig. 19.
Relief Procedure Warning on page 2 to reduce
and disconnect the four motor leads at the appro-
NOTE Refer to Fig. 20.
6.
Remove the conduit (41).
1. Disconnect the main fluid hose (63) from the
sprayer.
the new pressure control assembly. Tuming it can
Do
not allow the adapter
(A)
to tum while installing
damage the sensitive bourdon tube. Hold the
the swivel union (78).
adapter (A) firmly with a wrench while screwing on
2. Disconnect the fluid hose (23) from between the
displacement pump outlet nipple (22) and pres-
sure control inlet elbow (342).
7. Remove the three pressure control mounting
screws
(4)
and lockwashers
(64)
and nuts (65)
located below the pressure control box. Remove
the box.
8. Remove the mounting bracket (50) and screws
(51).
9.
Install the new pressure control assembly in the
duit seal (31) around the wires in the conduit con-
reverse order of disassembly. Reinstall the con-
nector
(345)
to prevent motor contaminationfrom
entering the pressure control. See the
DETAIL
below.
3.
Hold the hex of the pressure control adapter
(A)
firmly with a
19
mm open end wrench. Use an 10. Perform the PRESSURE CONTROL ADJUST-
adjustable wrench to loosen the swivel union (78). MENT, page 26, before regular operation of the
and remove the filter
(53).
sprayer.
Fig.
20
78
307-889 25