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REPAIR NOTES
1.
To
service the air motor, disconnect it from the
displacement pump as explained below, and refer
to
the air motor manual 307-456.
2. Packing Repair Kit 222-344 is available. Parts in-
cluded in the kit are designated with an asterisk,
for example, (103'). For best
results,
use
all of
the parts in the kit, even if the old parts look good.
Lubricate the packings before installing.
DISPLACEMENT PUMP SERVICE
(See
Figs.
4
&
5)
1.
Flush the pump and stop it at the bottom of its
stroke.
2. Before repairing the pump, follow the Pressure
Relief Procedure Warning on page
8.
3. Disconnect the air and fluid hoses. Unscrew the
Loosen the screw (16) and'remove the bung
bung adapter (16) and pump from the mounting.
adapter from the pump.
4. Remove the three locknuts (4) and unscrew the tie
rods (3).
See
Fig. 4.
5.
Remove the spring clip
(6)
and pin
(5)
holding the
coupling (115) in the air motor (1). Unscrew the
coupling from the air motor.
Pull
the air motor (1)
off the displacement pump (2).
TORQUE
TO
13.5-20
N.m
(10-15
11-lb)
4\
6.
Hold the pump upside down and unscrew the in-
take valve (102) from the pump cylinder (101).
See
Fig. 5. Remove the ball guide (105), ball
(104), and ball stop pin (106) from the cylinder,
being careful that they do not fall
out.
Remove the
or
damage. Check
the ball and seat for nicks.
gasket (103). Clean
all
parts and
inspect
for wear
7. Loosen, but do not remove the packing nut
(1
14).
Unscrew the coupling (115) from the displace-
ment rod (107) and push the rod down until
it
clears the bottom of the cylinder (101). Puli the
displacement rod out the bottom of the cylinder.
8.
Unscrew the piston stud (108) from the displace-
ment rod (107). Remove the piston nut (1 11) and
piston packing (121). Drive the pin (109) out of the
piston and remove the ball (1 10). Clean and in-
spect all parts for wear or damage.
9.
Unscrew
the
cylinder (101) from the outlet housing
the outer surface of the displacement rod
(107)
(1
13).
Inspect the inner surface of the cylinder and
for scoring which can damage the throat packings.
Remove and inspect the O-ring (1 12).
10.
Unscrew the packing nut (114) and remove the
throat packings from the outlet housing (113).
Clean and inspect all parts for wear or damage.
VI
u
Fig.
4
307-917
9