Hydraulic Motor Service - Stanley SK58 Service Manual

throttle valve bore of the accumulator housing for
damage. A light surface scuffing is normal. If deep
scratches or nicks are noticed, replace the part(s).
THROTTLE VALVE RE-ASSEMBLY
1. Apply grease and install a new o-ring (41) into the
channel in the kap seal (40) and then install the
assembly into the throttle valve bore of the accumu-
lator housing. When correctly installed, the o-ring
faces the wall of the bore. Apply grease and install
the washer (39).
2. Lubricate the throttle valve with clean hydraulic
fluid and install it into the throttle valve bore of the
accumulator housing with the key way facing
upward toward the handles on the accumulator
housing.
3. Apply grease and install a new kap seal (37) into the
groove located on the inlet flange (35) (throttle
valve side). Ensure the channel in the kap seal is
facing outward. Apply grease and install a new
o-ring (38) into the channel in the kap seal. Install
the inlet flange and secure with 2 capscrews (36).
4. Apply grease and install a new o-ring (6) into the
channel in the kap seal (11). Install the assembly,
followed by the washer (10), over the throttle valve
and into the bore. Press on the washer with the
appropriate o-ring tool to aid in the assembly. When
correctly installed, the o-ring faces the wall of the
bore.
5. Install the retaining ring (9), key (47), valve lever
(8), and secure with the locknut (7).
6. Test the function of the throttle valve by rotating the
valve lever back and forth. The lever should rotate
with ease. If it seems the throttle valve is binding,
disassemble the throttle valve and inspect the parts
for damage. If damage is noted, replace the part(s).

HYDRAULIC MOTOR SERVICE

The hydraulic motor assembly can be serviced without
disassembling the entire tool. Follow the instructions
below.
1. Complete steps 1, 2, 6, and 7 under "ACCUMULA-
TOR HOUSING, FLOW SLEEVE, PISTON, &
AUTOMATIC VALVE SERVICE".
2. Unscrew and remove the 3 capscrews (95).
3. Lift off the drive motor control block (82).
4. Unscrew and remove the 2 capscrews (67).
5. Lift off the motor plate (68) being careful to prevent
the gears from falling out.
6. Lift out the idler gear (72) and drive gear (99).
7. Remove the woodruff key (77) and push the drive
hex (76) out of the drive motor chamber (75).
8. If it is necessary to remove the latch, refer to the
section titled "LATCH AND SPRING SERVICE".
9. If it is necessary to remove the bushings (70 & 71),
obtain the following Stanley special tools.
Collet, p/n 05871 - used to remove item 71.
Actuator Pin, p/n 05067 - used with p/n 05871
Collet, p/n 5068 - used to remove item 70.
Actuator Pin, p/n 05067 - used with p/n 05068
Bearing Installation Tool, p/n 05061
Bearing Installation Tool, p/n 05044
A collet is inserted into the bearing until the lip on
the collet is under the bearing. The actuator pin is
then inserted into the collet to cause the collet to
spread. A puller is installed to the actuator to apply
force to pull the bearing out.
Bearing installation tools are inserted into the
bearing and then used with an arbor press to press
the bearing into the bore. Use of a bearing installa-
tion tool ensures a straight bearing to bore installa-
tion and correct depth.
10. Loosen the set screw (86) in the knob (87) and
remove the knob. Unscrew and remove the valve
guide (88). Reinstall the knob and setscrew and then
unscrew the motor control valve (89) to remove it.
INSPECTION AND CLEANING
Inspect and clean all parts as follows:
Cleaning
Clean all parts with a degreasing solvent. Blow dry with
compressed air and wipe clean. Use only lint-free
cloths.
Drive Motor Chamber
The chamber bores and bottoms around the bushings
should be polished and not rough or grooved. If the
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