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820-133 19
Service
7. Lubricate
the screws (25)
and then install and torque
them
to 170–200 in–lb (19–23 N.m).
CAUTION
Whenever you remove the paint pump screws,
torque them as instructed above, and then retorque
them
after 3 to 5 hours of operation.
8. Check the hydraulic oil level and add Graco-ap-
proved oil as necessary until the level is 1 inch (25
mm)
from the top of the plate. See Fig. 1
1.
9. Turn the pressure control fully counterclockwise
(no
pressure). Plug in the sprayer and turn it on. Run
the sprayer for two minutes to fill the hydraulic sys-
tem.
Increase the pressure to maximum
and turn the
sprayer
on and of
f
four times to help rid the hydraulic
system
of air
.
Fig. 15
21
22a
22b
26a
26
27
25
24
28d
28f
28c
28e
28b
28a
C
4
4a
38
37
36
66
35
3
67
20
28
18a
0284
1
3
4
2
Torque
to 125–150 in–lb (14–17 N.m).
Apply sealant to the threads.
Lubricate the internal threads.
T
orque to 125–150 in–lb (14–17 N.m).
T
orque to 280–300 in–lb (32–34 N.m).
Lubricate the threads.
T
orque to 320–360 in–lb (36–41 N.m).
T
orque to 170–200 in–lb (19–23 N.m).
Do not alter the position of the nut.
The start switch is located
in the switch box.
5
7
8
6
10
1
2
3
2
4
5
6
7
10
8
6
9
9