Stanley IDO7 Service Manual page 14

shows, replace the bushings. Inspect the motor shaft
and idler shaft for corresponding wear and replace as
required.
Gears
The drive and idler gears should have straight tips
without nicks; square tooth ends and a smooth even
polish on the teeth and end faces. Replace the gear if
cracks are present.
Main Housing Assembly
The surface near the gears should show two
interconnecting polished circles without a step.
Shafts
The shaft diameter at the bearing and seal locations
must be smooth. Grooves, roughness or a reduced
diameter indicate fluid contamination or damaged
bushings. Grit particles may have been imbedded in
the bushings, grinding into the hardened shaft. If
abnormal shaft wear as above occurs (more than
normal polishing), replace both the shaft and
associated bushings.
Also check the hydraulic system for excess
contamination in the fluid and for filter condition.
Operating conditions may require changing from a 25-
micron filter to an oversized 10-micron filter.
Tool Reassembly
1. Lubricate and install a new o-ring (5) and back-up
ring (26) into the main housing. Install the seal back-
up washer (34) and retaining ring (16).
2. Slide the reversing spool into the main housing
assembly. Insert the spool with the slot toward the
idler shaft hole and the narrow side of the depression
in the spool facing up toward the top of the main
housing.
3. Insert the idler shaft (48) with spring (50) and
plunger (49) to prevent the reversing spool from
turning.
4. Lubricate and install new wiper seals (70), o-rings
(12), back-up rings (17), and o-rings (3) into each seal
cap (71). Install each seal cap onto the main housing
assembly.
Service Instructions
5. Install each end cap (72) and secure withretaining
ring (74).
6. Lubricate the seal area of the main shaft (37) and
install it into the main housing. Install the idler gear
(35) onto the idler shaft.
7. Lubricate and install a new o-ring (11) onto the
motor cap (36). Lubricate the bolt (29) threads with an
antiseize compound and install the motor cap with
lockwasher (4). Tighten the bolts to 15-17 ft. lb./20-23
Nm in a cross pattern.
CAUTION
Do not force parts together.
8. Lubricate and install a new seal wiper (67) into the
trigger mount (82). Secure trigger (81) to trigger mount
with roll pin (21). Install the trigger assembly to the
main housing with bolts (8) and lockwashers (22).
9. Install a new o-ring (19) in main housing and new o-
ring (18) on valve spool. Lubricate the valve spool
bore and seals with grease before installing the valve
spool (65) into the main housing from the spring cap
end. Do not install the valve spool from the trigger side
of the main housing as this will result in spool seal
damage. Ensure that the tab on the valve spool nose is
aligned with the slot in the trigger. Install spring (83)
behind the valve spool. Using Loctite™ 242, install
spring cap (73) to main housing.
10. Lubricate with grease and install the bearing races
(32) and thrust bearing (33). Install the spacer (47)
with the smaller stepped diameter facing the main
housing.
11. Install the impact mechanism. Tighten bolts (8)
with lockwashers (22) to 48 in. lb./5.4 Nm. If a trigger
guard (43) is used, install it at this time with bolt (23)
and nut (20).
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