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INSTALLATION
NOTE:
Never let hydraulic oil temperature exceed
poor performance and reduced seal life.
1 W F (HOC). High temperatures will cause
CAUTION
damage to the motor. Blow out all hydraulic lines
Keep the hydraulic supply system clean to avoid
with clean air and flush thoroughly with solvent
before connecting the lines to the motor.
Be
sure your hydraulic power supply has a suction
filter to the hydraulic pump and
a
return line filter
of 10 micron size. This is
a
regenerative motor, so
the volume in the return
line
is
twice the inlet
volume. Be sure the return line filter is of adequate
size to handle this greater, volume. Follow the
manufacturer's recommendations on reservoir
and filter cleaning, and
periodic changes of
hydraulic fluid.
Grounding
I W A R
For your safety, read the FIRE OR EXPLOSION
HAZARD section on
D a w
3 and around Your en-
1
tire system es instructed-there.
-
I
hoses, and be sure that your power unit
is properly
Use
only conductive or grounded hydraulic and fluid
grounded. Ground the pump as explained below.
NOTE:
Reference numbers in the text refer to Fig 1
and the Parts Drawings on pages 6 , 8 and
10.
i'
53
A
B
Fig 1
On Model 210-107, the grounding lug 152) and washer
For Models 210-107 and 217-333
( 5 3 )
are located on the motor base as shown in Fig 1. On
Model 217-338, the grounding lug (61) and washer (62)
are on the tie plate. Refer to ACCESSORIES on page 11
to order a ground wire and clamp.
washer. Insert one end of the groundmg wire (12 ga
Loosen the locknut (A) of the grounding lug
and
minimum) (E) into the slot of the lug and tighten the
locknut securely. See Fig 1. Connect the other end of
the wire to
a
true earth ground, as recommended by
your local code.
The ground wire and clamp are supplied with your GH
Sprayer. Connect the clamp to a true earth ground as
recommended by your local code.
For Model 217-022
SERVICE
Pressure Relief Procedure
WARNING
To reduce the risk of serious bodily injury, in-
the skin,
or
injury from moving
parts, always
cluding fluid injection, splashing in the eyes or on
follow this procedure whenever the pump is shut
off, when checking or servicing any part
of the
system;.when
installing or changing spray tips,
and whenever you stop spraying.
1. Engage the spray gun or dispensing valve safe-
2. Turn
off
the hydraulic power
supply.
3. Disengage the gun or dispensing valve safety
latch.
4. Hold
a
metal part of the gun or valve firmly to a
to relieve the fluid pressure.
grounded metal waste container and trigger
it
5. Engage the safety latch again.
6. Open the pump
drain valve (required in
system), having a container ready to catch the
drainage.
7. Leave the drain valve open until you are ready
to spray again.
I f you suspect that the spray
tip
or hose is com-
pletely clogged, or thatpressure has not been fully
relieved after following the steps above, VERY
relieve pressure gradually, then loosen complete-
SLOWLY loosen the hose end coupling and
ly. Now clear the tip or hose obstruction.
ty latch.
CAUTION
motors. Take special care to avoid getting dust or
Cleanliness
is
essential when repairing hydraulic
dirt into the motor during service.
NOTE:
Repair kit 220-457 is available to replace the
gaskets (25). spring retaining plugs
(281,
springs
(29).
spool (371, trip rod (36), and
and springs must be replaced
as a
group.
piston stop (33). The spool, retaining plugs,
Dlsassernbly
1. Follow the Pressure Relief Procedure
at left,
lines from the motor. Remove the pump from its
Disconnect the hydraulic supply, return, and drain
mounting.
2. Disconnect the displacement pump from the motor
as
explained in your separate pump or system in-
struction manual. Plug the hydraulic lines to keep
dirt out.
3.
Place the hydraulic motor in
a
bench vise.
4. On Model2101070nly, remove the drip pan screws
(4) and drip pan ( 5 0 ) from the motor
base (42).
Unscrew the drip cover
retainer
screw
(6) and
I\
remove the drip cover (31) from the piston (49).
5. Push the piston (49) up as far as possible,
to
engage
the detent mechanism. Tap
the piston lightly
if
necessary.
307- 158
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