TM
55-1730-229-34
AC
320A0-MME-000
TO
35C2-3-473-2
TM
1730-34/1
flame. Fire extinguishers should
(1) Disconnect battery (paragraph
be provided when these materials
4-25, TM 55-1730-229-12).
are in use. In addition, these
materials evaporate quickly and
(2) Remove bolt (30) and jam nut
have a drying effect on the skin.
(29).
If used without gloves, they may
(3) Remove two bolts (1), flat
cause cracks in the skin and irri-
tation or inflammation. Use only
secure the turnbuckle mounting bracket
in well ventilated places. The
(4) to the right side of the chain drive
use of diesel fuel oil, gasoline,
(5).
housing
Remove
the
mounting
or benzine (benzol) for cleaning
bracket. Swing the push/pull lever (6),
is strictly prohibited.
with turnbuckle attached, out and away
from the clutch housing (12). Remove
(1) Use solvent P-D-680 to clean
loop clamp securing microswitch lead.
or wash grease or oil from all parts of
the clutch assembly.
(4) Remove the two phillips head
screws (8), spacers (9), flat washers
(10), and nuts (11) that secure the
(2) Before installing new parts,
engage/disengage microswitch (7). Re-
move the microswitch and pull the wiring
as rust-preventive compound or protec-
harness away from the clutch housing
tive grease.
area.
c. Inspection and Repair.
(See
(5) Remove the seven bolts (13),
that secure the clutch housing (12) to
(1) Inspect the shifter hub (20)
the chain case housing (5). Remove the
for damage.
Internal splines must be
clutch housing (12) and gasket (17).
free of large chips or broken teeth.
Remove the push rod (16) from the hous-
Check for cracks in the hub housing.
ing. Remove packing (24) and discard.
The engagement groove in the front of
the hub must be free of gouges or burrs
(6) Hold the outer clutch shifter
that could hinder proper operation. Use
a fine file and stone to smooth minor
cup (27) and loosen the three jam nuts
(18) and set screws (19) that secure the
nicks and burrs. Major damage will re-
quire hub replacement.
shifter cup (27) to the shifter hub
Slowly remove the shifter cup
(20).
from around the shifter hub until the
(2) Inspect the shifter cup (27)
for damage.
The clutch mating surface
spring pressure is released. Remove the
must be smooth and free of distortion.
shifter cup, drive engage spring (21),
The threaded set screw holes must be
and spring bushing (22).
clean and undamaged. Minor thread dam-
age may be repaired by running the
(7) Remove the shifter hub (20) by
proper size tap down the threads. Check
pulling the hub straight off the drive
Use a
for cracks in the cup housing.
sleeve gear (23).
fine file and stone to smooth minor
Cleaning.
nicks and burrs. Major damage will re-
b.
quire hub replacement. Mate the cup and
hub assemblies by hand and press them
together while turning to check for
The two assemblies
smooth operation.
Cleaning solvent is flammable and
should operate smoothly without catching
should not be used near an open
or binding.
Change 2
10-20