14 307-738
Maintenance
T
ighten the Paint Pump Screws and Inlet V
alve
See Fig. 10.
1.
Follow the
Pressure Relief Procedure
on page 8.
2. Torque the four screws (25) on the paint pump (22)
to
19–23 N.m.
3. T
orque the inlet valve (26) to 36–41 N.m.
Check and/or Change the Hydraulic Oil
See Fig. 1
1.
1.
Follow the
Pressure Relief Procedure
on page 8.
2. Remove
the fill cap (5). The oil should be 25 mm from
the
top of the plate. If the oil is low
, add oil as neces
-
sary. use only Graco lightweight hydraulic oil, part
no. 218–797. Reinstall the fill cap, hand tight, if you
are
not going to change the oil.
3. To
change the oil, turn the sprayer over and drain the
oil
through the fill cap hole.
Whenever
you remove the fill cap, be very careful not
to let any dirt, paint particles, or other contaminants
get into the hydraulic system. Contaminants can
cause
damage to the hydraulic system.
CAUTION
4.
Fill the hydraulic pump housing with 55 ml of Graco
lightweight hydraulic oil. Reinstall the fill cap.
5. Plug
in the sprayer
. T
urn the pressure control (4) fully
counterclockwise (no pressure). T urn on the
sprayer
and let it run for two minutes to fill the hydrau
-
lic system. Increase the pressure to the maximum
and
turn the sprayer on and of
f four times to help
rid
the
hydraulic system of air
.
Fig. 10
Lubricate
the threads.
T
orque to 19–23 N.m.
T
orque to 36–41 N.m.
22
26
25
Fig.
1
1
25
mm
5
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