 |
|||
|
|
|||
|
Page Title:
FIGURE 27. POLISHING COMMUTATOR WITH SANDPAPER. |
|
||
| ||||||||||
|
|
 e. Repair of Drive Clutch.
tator against limits specified in wear
limits (par. 41f) and undercut mica ((2)
(1) Smooth burs, nicks, and rough spots on
below) if refinished commutator is with-
splines and pinion teeth using a fine
in limits specified. Replace armature
if commutator does not conform to
stone or crocus cloth dipped in dry
measurements specified.
cleaning solvent.
(2) Smooth rough spots, scoring, scratches,
(2) Undercutting mica. After resurfacing
and nicks on inside bore of sleeve bear-
the commutator, undercut mica to a
ings and all surfaces of bronze bearings
depth of 0.025 to 0.032 inch below the
using crocus cloth dipped in dry clean-
surface of the commutator using a
ing solvent.
power-driven undercutting tool (fig. 25).
If a power-driven tool is not available,
(3) Smooth minor rough spots, nicks, and
the mica may be undercut by hand as
shown in figure 26.
scratches on internal polished surface
of shell using a fine stone or crocus
cloth dipped in dry cleaning solvent.
Note. Use care in undercutting. Do not
If nicks and scratches cannot be re-
widen commutator slots by removing
moved or surface cannot be restored
metal from segments, and do not leave
to original finish, replace the shell.
thin edge of mica next to segments.
Figure 26 illustrates examples of good
and bad undercutting.
f. Repair of Lever Housing.
(3) Polishing commutator. After the mica
(1) Smooth minor scratches, burs, and
has been undercut, remove all copper
nicks on machined surfaces of lever
and mica particles with compressed air.
housing using a fine mill file.
Polish the commutator in a lathe with
No. 2/0 sandpaper (fig. 27) while the
(2) Repair damaged threads in housing.
armature is rotating at 1500 rpm. After
polishing the armature, check that the
diameter is within the limits specified
(3) Smooth minor rough spots, scoring,
in wear limits (par. 41f).
scratches, and nicks on inside bore of
sleeve bearing using a fine stone or
crocus cloth dipped in dry cleaning sol-
vent.
g. Repair of Shift Lever, Shaft and Solenoid
Plunger.
(1) Smooth minor rough spots, scratches,
and nicks on clutch contact surfaces of
shift lever using a fine stone. Smooth
minor rough spots, scratches, and nicks
on lever shaft using a fine stone.
(2) Repair damaged threads on plunger rod.
-- . Repair of Frame.
h
(1) Smooth minor scratches, burs, and nicks
on machined surfaces of frame using a
fine mill file.
(2) Repair damaged threads in frame. Re-
pair damaged threads on field coil ter-
minal stud.
WITH SANDPAPER.
|
|
Privacy Statement - Press Release - Copyright Information. - Contact Us |
Click
here for thousands of PDF manuals