Wrench Disassembly & Reassembly For Repair; Motor Disassembly; Motor Cleaning & Inspection; Cleaning - Stanley IW12 Service Manual

6. On underwater models, secure the lower trigger guard to
the main housing using the 10-24 x 1-3/4-inch/44 mm long
socket head capscrew and locknut.
WRENCH DISASSEMBLY &
REASSEMBLY FOR REPAIR

MOTOR DISASSEMBLY

1. Remove the impact mechanism as described in the
Impact Mechanism Removal and Installation section of this
manual.
2. Remove the eight 3/8-16 x 1-3/4-inch/44 mm long socket
head capscrews and lockwashers securing the motor cap
assembly to the main housing.
3. With the wrench handle gripped in a vise, press on the
splined end of the main shaft with one hand and support
the motor cap assembly with the other. Press the motor cap
assembly, gears and O-ring out of the main housing. DO
NOT pry or in any way excessively force the motor cap as-
sembly off of the main housing.
4. Remove the large O-ring from the motor cap assembly.
5. Remove the idler gear, idler shaft and main shaft.
6. If the relief adjustment screw O-ring requires replace-
ment, loosen the jam nut and remove the relief adjustment
screw. Be sure to count the number of turns required to
remove it so it can be replaced in the same position. Refer
to the Impact Adjustment section of this manual.
MOTOR CLEANING & INSPECTION

CLEANING

Clean all parts with a degreasing solvent. Blow dry with
compressed air and wipe clean. Use only lint-free cloths.
BUSHINGS (MAIN HOUSING & MOTOR CAP)
The inside of the bushings should be gray in color. If a sig-
nifi cant amount of yellow-bronze shows, bushing replace-
ment is required. Inspect shafts for corresponding wear and
replace as required.
SERVICE

GEAR CHAMBER (MOTOR CAP)

The gear chamber bores and end faces around the bores
should be polished, not rough or grooved. The fl at surfaces
around the chamber and bolt holes should be fl at and free
of nicks and burrs that could cause misalignment or leaks.

GEARS

Both gears should have fl at, straight tips without nicks.
They should have a smooth even polish on the teeth and
end faces. Discard the gear if cracks are present.

MAIN HOUSING ASSEMBLY

The gear running surfaces should show two inter-connect-
ing polished circles without a step or roughness.
If abnormal wear occurs in excess of normal polish-
ing, both shafts and associated bushings must be
replaced. The hydraulic system should be thoroughly
fl ushed and the fi lter replaced before further opera-
tion of the wrench.

SHAFTS

The main diameter at the bushing locations must be
smooth. Grooves, roughness or a reduced diameter indi-
cates fl uid contamination and damaged bushings.

MAIN HOUSING DISASSEMBLY

Note:
See the Parts List section of this manual for orientation
of parts in the main housing assembly.
1. Remove the 1/4-20 x 1/4-inch/6 mm long internal hex set
screw securing the reversing spool lever and remove the
lever from the reversing spool.
2. Remove the retaining ring at the opposite end of the
reversing spool.
3. Pressing on the retaining ring end of the reversing spool,
carefully slide the reversing spool in just far enough to gain
access to the back-up ring and O-ring on the lever side.
Remove the back-up ring with the appropriate O-ring tool.
4. Pressing on the lever end of the reversing spool, care-
16
IMPORTANT