Pressure Control Replacement - Graco E Series Instructions-Parts List Manual

WARNING
Before doing this procedure, follow the Pressure
Procedure Warning
Relief
the risk of a fluid injection injury, splashing in the
eyes or on the skin, injury from moving parts, or
electric shock.
Refer to Fig 28- 1.
1. Disconnect the main fluid hose (23) and the secon-
dary fluid hose, if used, from the sprayer.
2. Disconnect the fluid hose (47) from between the dis-
placement pumpoutlet nipple
trol inlet elbow (78).
3. Hold the hex of the pressure contwl adapter (A)
firmly with a 19 mm open end wrench. Use a wrench
to unscrew the nipple (123) and filter.
4. Remove the pressure control cover and screws, and
disconnect the four motor leads at the appropriate
terminals.
5.
Refer to CIRCUIT BOARD REPLACEMENT on
page 26, remove the circuit board and retain.
6. Remove the conduit (22).
7. Use a 13 mm open end wrench to loosen and remove
the three pressure control mounting screws (44) and
lockwashers and nuts (120) located below the
(40)
pressure control box. Remove the box.
8. Install the new pressure control assembly in the re-
verse order of disassembly.

PRESSURE CONTROL REPLACEMENT

on page 21 to reduce
(46)
9. Perform the STALL PRESSURE CALIBRATION
starling on page 28, before regular operation of the
sprayer.
CAUTION
Do not allow the adapter (A) to turn while installing
the new pressure control assembly. Turning it can
damage the sensitive bourdon tube. Hold .the
adapter firmly with a 19 mm open end wrench while
screwing In the nipple (123).
Fig
28-1
307-670 27