TM 9-2330-271-14&P
CHAPTER 7
REPAIR OF LANDING GEAR
i.
Using soft hammer or bar, drive landing gear
7-1.
General
screw (22) down until bevel gear (40) machine key (21)
This chapter covers the rigid-type landing gear used on
and tapered roller bearing (7) can be removed from gear
XM574, XM574E1, XM654, XM680, XM680E1, XM738,
box.
XM739, XM739E1, XM822, XM823, XM824, XM844, and
j.
Remove plug (32), spring clip (33) and gib (34)
XM845 semitrailers. The swing-up landing gear used on
from upper leg assembly (19).
XM847, XM848, XM849, XM850, XM912, and XM913
k. Remove lower leg assembly (29) including
semitrailers is not authorized for repair. Replacement by
landing gear screw (22) and roller thrust bearing (20)
organizational maintenance is authorized for the swing-
from upper leg assembly (19).
up landing gear.
I.
Remove roller thrust bearing (20) from landing
gear screw (22) and unscrew landing gear screw from
7-2.
Removal
nut (30) in lower leg assembly (29).
NOTE
Refer to paragraph 4-51b for removal of landing gear.
Do not perform steps m, n, and p below
7-3.
Disassembly (fig. 48)
unless inspection of parts to be removed
indicates that parts are unserviceable.
a. Remove landing gear wheels (paragraph 4-
m. With lower leg assembly (29) in inverted
51e).
position, drive out and remove two pins (31) securing nut
b. Turn landing gear crank shaft until lower leg
(30) inside lower leg tube. Remove nut.
assembly (29) is in fully retracted position.
n. Using arbor press (or equivalent), remove two
c. Remove four screws with integral washers (42)
each sleeve bearings (15 and 16) from gear box (38).
securing cover (2) and gasket (3) to gear box (38).
o. Remove two lubrication fittings (35) from upper
Remove cover.
Remove and discard gasket if
leg assembly (19).
replacement is necessary.
NOTE
7-4.
Cleaning
Removal of cover will provide access for
a. Wipe all parts clean.
removal of spring (9) and ball bearing
b. Remove old lubricant with approved cleaning
(10).
solvent (paragraph 3-3b).
d. Drive out pin (12) securing sliding spur gear set
(8) to crank shaft (11).
thoroughly.
e. With movement toward the nine-hole gear box
mounting flange, remove crank shaft (11). Remove
7-5. Inspection and Repair
sliding spur gear cluster (8).
f.
Drive out pin (12) securing spur gear cluster
a. Inspect all parts for wear, distortion and cracks.
(39) and pin (18) retaining bevel gear (5) to gear shaft
(17).
Replace all unserviceable parts.
g. With movement away from the nine-hole gear
b. Cracks in such parts as gear box, cover, upper
box mounting flange, remove gear shaft (17), woodruff
and lower leg assemblies may be welded to maintain
key (13), flat washer (6), bevel gear (5) and spur gear
serviceability.
c. Check gears for worn, cracked or broken teeth.
cluster (39).
h. Remove self-locking nut (4) and spring clip
Remove burrs with fine file or abrasive cloth.
d. Check bearings, bearing cup and sleeve
(41) securing bevel gear (40), tapered roller bearing (7)
and landing gear screw (22) to gear box (38).
bushings for excessive wear.
e. Check landing gear screw, crank and gear
NOTE
shafts for wear and straightness. Roll screw and shafts
Removal of tapered roller bearing (7)
on flat surface to check straightness.
from left hand leg gear box will include
f.
Replace landing gear screw in nut (lower leg
bearing cup.
assy) and check full length of screw for ease of operation
or wear. Remove screw after inspection.
7-1
