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14 820-133
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
(A) of the inlet valve (26) 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 (25) and the inlet
valve (26).
T
ighten 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 screws (25) on the paint pump to
170–200
in–lb (19–23 N.m).
3. Torque the inlet valve (26) 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 (5). The oil should be 1 inch (25
mm)
from the top of the plate. If the oil is low
, add oil
as necessary. 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.
CAUTION
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.
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 knob
(4) fully counterclockwise (no pressure). Turn on
the
sprayer and let it run for two minutes to
fill the hy
-
draulic 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
0272
22
26
A
Fig. 10
0273
1
3
2
Lubricate
the threads.
T
orque to 170–200 in–lb (19–23 N.m)
T
orque to 320–360 in–lb (36–41 N.m)
22
26
25
1
2
1 3
Fig.
1
1
25
mm
(1 inch)
0269
5
4