Technical data

PRESSURE CONTROL REPLACEMENT

(Refer to Fig 17)

Before doing this procedure, follow the Pressure

IRN’NGl

Relief Procedure Warning on page 13 to reduce

the risk of an Injection injury, injury from moving

parts, or electric shock. Unplug the sprayer1

1. Disconnect the main fluid hose and the secondary

fluid hose, if used, from the sprayer.

2. Disconnect the fluid hose (47) from between the

displacement pump outlet nipple (46) and pressure

control inlet nipple (344).

3. Hold the pressure control outlet nipple (341) firmly

with a 314” open end wrench, and screw the tee

(651 off of the nipple.

Do not allow the adapter (341) to turn while

removing or installing the new pressure control

bourdon tube. Hold the adapter firmly with a 3/4”

open end wrench while screwing on the tee (851.

Remove the pressure control cover and screws

(36,151, and disconnect the four motor leads at the

appropriate terminals. See Fig 16, page 25.

Refer to “Circuit Board Replacement” on page 25,

remove the circuit board and retain.

Remove the conduit (22).

Use a l/2” open end wrench to loosen and remove

the pressure control mounting screws (44) washers

(40) and nuts (41) located below the pressure con-

trol box. Remove the box.

Install the new pressure control assembly in the

reverse order of disassembly. Be sure to reinstall

the conduit seal E-not shown) around the wires in

the conduit elbow (345) at the pressure control to

prevent motor contamination from entering the

control box.

Perform the pressure control calibration procedure

starting on page 27, before regular operation of the

sprayer.

Fig 17

28 620-047