Graco ULTRA 1000 Instructions-Parts List Manual page 26

PRESSURE CONTROL REPLACEMENT
(Refer to
Relief Procedure Warning on page 13 to reduce
the risk of a fluid injection injury, injury from mov-
1. Disconnect the main fluid hose
1 9 0 )
and the secon-
dary fluid hose, if used, from the sprayer.
2. Disconnect the fluid hose (47) from between the
displacement pump outlet nipple
( 4 6 1
and pressure
control inlet nipple (344).
3. Loosen the filter bracket nut
( 2 8 1
and washer (13)
using a 314, open end wrench.
4. Hold the pressure control adapter (3411 firmly with
to loosen the swivel union (8). then remove the fluid
a 3/4" open end wrench. Use an adjustable wrench
filter
(481.
5. Remove the pressure control cover and screws(36,
15), and disconnect the four motor leads at the ep-
propriate terminals.
6. Refer to Circuit Board Replacement on page
2 2 ,
remove the circuit board and retain.
7. Remove the conduit
(221.
8. Use a 112 open end wrench to loosen and remove
the pressure control mounting screws
(44)
located
below the pressure control box. Remove the box.
9. Install the ne% pressure control assembly in the
the conduit seal (6not shown) around the wires in
reverse order of disassembly. Be sure to reinstall
the conduit connector (345) to prevent motor con-
tamination from entering the control box.
I E A U
stelling the new pressure control assemMy. Turn-
Do not allow the edapter (341) to turn while in-
ing
it
can damage the sensitive bourdon tube.
Hold the adapter firmly with a 3/4" open end
wrench while screwing on the swivel union (81.
10. Perform the pressure control calibration procedure
on page 27, before regular operation of the sprayer.
I
Fig 20)
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1
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307-705