14 307-711
MAINTENANCE
Lubricate the Inlet V
alve
(See Fig 9)
1. Follow
the
Pressure Relief Procedure
on page 1
1.
Remove
the inlet screen.
2. Turn
the sprayer over
. Press down lightly on the stem
of
the inlet valve with a small screwdriver
. Pour about
a
teaspoon of mineral spirits or solvent
into the valve,
then
remove the screwdriver
.
3. Set the sprayer upright. Increase the pressure con-
trol
setting half way
. T
urn on the
sprayer for a few se
-
conds,
then turn it OFF
.
4. Now tighten the paint pump screws and the inlet
valve.
Tighten
the Paint Pump Screws and Inlet V
alve
(See Fig 10)
1. Follow
the
Pressure Relief Procedure
on page 1
1.
2. Torque
the four hex head screws on the paint
pump
to
170–200 in–lb (19–23 N.m).
3. Torque
the inlet valve to 320–360 in–lb (36–41
N.m).
Check
and/or Change the Hydraulic Oil
(See Fig 1
1)
1. Follow
the
Pressure Relief Procedure
on page 1
1.
2.
Remove the
fill
cap. The oil should be 1 in. (25 mm)
from
the top of the plate. If it is lower
, add oil as nec
-
essary.
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 contami-
nants get into the hydraulic system. Contaminants
can
cause serious damage to the hydraulic system.
CAUTION
4. Fill
the hydraulic pump housing with
16.5 ounces (55
ml) of Graco lightweight hydraulic oil.
Reinstall the fill
cap.
5. Plug in the sprayer. Turn the pressure control fully
counterclockwise (no pressure). Turn on the
sprayer
and let it run for two minutes to fill the hydrau
-
lic system. Increase the pressure to maximum and
turn
the sprayer on and of
f four times to help rid the
hydraulic system of air
.
Fig 9
Fig 10
Fig 11
STEM
PAINT
PUMP
INLET V
ALVE
PUMP SHOWN UPSIDE DOWN
0272
0273
PAINT
PUMP
TORQUE TO
320–360 in–lb
(36–41 N.m)
TORQUE TO
170–200 in–lb
(19–23 N.m)
0269
1”
(25 mm)
FILL CAP
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