Pressure control replacement – Graco ULTRA AIRLESS 230-963 User Manual

Page 24

PRESSURE CONTROL REPLACEMENT

the risk of a fluid injection injury, splashing in the

Disconnect the main fluid hose

and the secon-

dary fluid hose, if used, from the sprayer.

2. Disconnect the fluid hose

from between the

displacement pump outlet nipple

and pressure

control inlet elbow

Loosen the filter bracket nut

and washer

using a 19

open end wrench.

4. Hold the pressure control adapter

firmly with

wrench to loosen the swivel union

then

a 19 mm open end wrench.

Use an adjustable

remove the fluid filter

5. Remove the pressure control cover and screws, and

terminals.

disconnect the four motor leads at the appropriate

6. Refer to

CIRCUIT BOARD REPLACEMENT on

page

22,

remove the circuit board and retain.

7. Remove the conduit (41

Fig

Use a 13 mm open end wrench to loosen and

remove the pressure control mounting screws

and washers

located below the pressure con-

trol box. Remove the box.

9. Install the new pressure control assembly

the

reverse order of disassembly.

CAUTION

stalling the new pressure control assembly. Turn-

ing

can damage the sensitive bourdon tube.

Hold the adapter firmly with a 19 mm open end

10. Perform the

STALL PRESSURE CALIBRATION

starting on page 24, before regular operation of the

sprayer.