Switch replacement, Microswitch replacement – Graco ULTRA AIRLESS 230-963 User Manual
Page 20
SWITCH REPLACEMENT
WARNING
Before doing this procedure, follow the Pressure
Relief Procedure Warning on page 17 to reduce
the risk of a fluid injection injury, splashing
in
the
eyes or on the skin, injury from moving parts, or
electric
shock.
Remove the pressure control cover and screws.
2. Remove the wires attached to the switch
at
and
using a screwdriver. See page
Fig
21.
3.
Use a 16 mm socket wrench to loosen and remove
the nut and rubber boot
from the top of the
pressure control box. Remove the switch guard
4. Remove the
switch.
5. Remove the wires attached to the switch TP4 and
TP3 using a screwdriver. See page
6. Attach the wires to TP4 and TP3 of the new switch.
7. Install the new switch so the internal tab of the
rotation ring
engages with the vertical groove
engages with the blind hole
of the pressure
in
the threads of the switch, and the external tab
trol box.
8. Install the switch guard
aligning the internal
tab with the groove in the threads.
9. Powder the inside of the rubber boot
with
talcum, then shake excess out of boot.
10. Install the nut and rubber boot and tighten.
11. Reconnect the wires to
and
12. Reinstall the pressure control cover and screws.
REPLACEMENT
Before doing this procedure, follow the Pressure
the risk of a fluid injection injury, splashing
in
the
Relief Procedure Warning on page 17 to reduce
eyes or on the skin, injury from moving parts, or
1. Remove the pressure control cover and screws.
2. Disconnect both wires from the microswitch
3. Use the socket wrench to remove the nuts from the
microswitch.
4. Check to see if the flag
is loose. If
it
is, be sure
the fluid pressure is
0
bar psi), then loosen the
two
6
mm hex nuts behind the microswitch. Adjust
the distance from the top of the flat to top inside
of
the pressure control box to
mm
in.).
Tighten the screwsand recheck
the dimension. Refer to Fig 1.
5. Perform the
STALL PRESSURE CALIBRATION
on page 24 before regular operation of the sprayer.
6. Reinstall the cover
and screws.
15)
Fig
14
Fig
15