TM-9-2330-238-14

CHASSIS, SEMITRAILER: 6-TON, 4-WHEEL M295A1; SEMITRAILER, VAN: EXPANSIBLE, 6-TON, 4-WHEEL M313; SEMITRAILER, VAN: SHOP, FOLDING SIDES, 6-TON, 4-WHEEL M447 AND M447C; SEMITRAILER, VAN: REPAIR PARTS, SHOP EQUIPMENT, 6-TON, 4-WHEEL M749; SEMITRAILER, VAN: REPAIR PARTS STORAGE, 6-TON, 4-WHEEL M750

TECHNICAL MANUAL; OPERATOR’S, ORGANIZATIONAL, DIRECT SUPPORT, AND GENERAL SUPPORT MAINTENANCE MANUAL

JULY 1992
TM-9-2330-238-14

  TM-9-2330-238-14 - Page 335 of 462

TM
9-2330-238-14
5-12.
LANDING
GEAR
GEARBOX
REPAIR
(EARLY MODEL)
(Con’t).
WARNING
Dry cleaning
solvent,
P-D-680,
is toxic and flammable.
Always wear protective
goggles
and gloves,
and use only in a well-ventilated
area.
Avoid contact
with skin, eyes,
and
clothes,
and DO NOT breathe
vapors.
DO NOT use near open frame or excessive
heat.
The
solvent’s
flash
point
is 100°F-138°F
(38°C-59°C).
if you
become
dizzy
while
using cleaning
solvent,
immediately
get fresh air and medical
help. If solvent
contacts
eyes,
immediately
wash your eyes and get medical
aid.
1.
Clean
all parts with dry cleaning
solvent
and dry thoroughly.
2.
Inspect
bearing
for rust, pits,
or excessive
wear.
3.
Inspect
lubrication
fittings
(9) for cracks
or bends.
4.
Inspect
gear clusters
for cracks,
breaks,
or chipped
gear teeth.
5.
Inspect
access
cover
and gearbox
base
assembly
for cracks
or breaks.
6.
Inspect
all mounting
hardware
for cracks,
bends,
or stripped
threads.
7.
Replace
all defective
parts as necessary.
1.
2.
3.
4.
5.
6.
7.
8.
9.
10.
11.
12.
Position
inner bearing
block
(8) in place
on support
leg bracket
(6) and install
two
capscrews
(13) and new
Iockwashers
(12).
Position
outer bearing
block
(10) and ratchet
handcrank
holder
(11) in place
on support
leg bracket
(6) and
install
two capscrews
(13) and new Iockwashers
(12).
Using
arbor press,
install
bearing
(4) and new seal (5) in gearbox
base
assembly
(3).
Position
gearbox
base
assembly
(3) in place
on support
leg bracket
(6) and over shaft of leg assembly
(7).
Install two capscrews
(16), new Iockwashers
(15), capscrew
(18), and Iockwasher
(17).
Install
gear cluster
(19) on shaft of leg assembly
(7) and secure
with pin (14).
Install
gear cluster
(20) on crankshaft (1)
and secure
with pin (2). Slide
round end of crankshaft
through
upper
hole
of gearbox
access
cover
(27).
Lubricate
gear clusters
(19 and 20) in accordance
with Lubrication
Instructions
(Chapter
3, Section
l).
Position
access
cover (27) and crankshaft
(1) in place
on gearbox
base assembly
(3), ensuring
that crankshaft
and shaft of leg assembly
(7) are alined
with their respective
holes.
Install four capscrews
(26), new Iockwasher
(25), and washers
(24) and secure
access
cover
(27) to gearbox
base
assembly
(3).
Install
bearing
bail
(23), spring
(22), and plug
(21) in access
cover
(27).
Install
ratchet
on crankshaft
(para 5-15).
Check
operation
of landing
leg.
5-33


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