Service Manual
17
Press or drive out the coil pin that retains the
two
check valve bodies. Use a four blade
5/16-18
tap to tap
holes in check valve bodies. Insert a long bolt or a
threaded puller, pull the check valve bodies from the
pintle housing and discard them.
18
Remove check balls and retaining ring.
19
Inspect check valve balls and retaining rings.
Replace any defective parts.
Check Valve-Installation
20
Install retaining rings and check valve balls in bores
of pintle. Press new check valve bodies in bores. Press
far enough for coil pin clearance.
Important: To prevent dislodging
of
retaining rings
do
not
drive check valve bodies into bores.
21
Press coil pin into pintle until flush with or slightly
below surface.
Dampening Piston
-
Removal
(Model
7
Only)
Note:
Remove only
if
surface is scored.
\
..
Dampening
Pistons
(2)
...
..
..
...
..
. . ..
...
1
Back-up
Rings
(2)
O-ring Seals
(2)
Dampening Piston-Installation
23
Install new back-up rings nearest to the smooth
piston face and O-rings in grove on a new piston.
24
Lubricate outer surface of the pistons. Press pistons
(smooth face up) in bores in pintle to the bottom
position.
Motor Rotor- Removal
I
Motor Wide
Rotor
Band
Rubber
Assy.
Body
Fig.
15
25
Remove the motor assembly intact from the body.
Important: 'Use special care when removing the
motor rotor from the body. The ball pistons MUST
remain in place as they are matched to the motor
bores. Use a wide rubber band to hold the ball
pistons in place.
8
Fig.
14
22
To
remove pistons, firmly tap the outside edge of
pintle on a work surface. Remove back-up ring and
O-ring from pistons.
Important: When dislodging dampening pistons, do
not hit pintle journals or the pintle housing
will be
ruined.
Note:
If
tapping of pintle does not dislodge the pistons,
use adhesive to cement a bolt or similar object to the
pistons and pull them from the bore.
Body
Motor Contact
Race Line
Fig.
16
26
Inspect the contact line of the motor ball pistons on
the motor race located in body. This contact area must
be smooth and completely free of any irregularities.
If
any irregularities are noted, replace the motor race.
Note:
if
irregularities are noted in the motor race, it is
reasonable to assume that one or more ball pistons and
rotor bores will also be damaged.
Rotor Assemblies-Disassembly
Inspection