TM 9-2330-271-14&P
CHAPTER 6
REPAIR OF AXLE AND BRAKE ASSEMBLY
AND SPRING SEAT
(3) Remove eight nuts (40), lock washers
6-1.
General
(39), and bolts (35) securing two spring guide brackets
Generally, axle assemblies will not be removed unless
(48) and lower torque rod brackets (45) to the axle.
inspection discloses need for repair or re-placement.
Remove spring guide brackets and lower torque rod
For inspection purposes, remove wheel (paragraph 3-
brackets. Remove spring plate (47) from spring guide
brackets (48).
(4) Remove eight nuts (40), lock washers
6-2.
Axle, XM574, XM574E1, XM654, XM680,
(39) and bolts (35) which secure two upper torque rod
XM680E1,
XM738,
XM739,
XM739E1,
brackets (46) and bracket plate (44) to the axle.
XM822, XM823, XM824
(5) Remove nuts, lock washers and cap
screws and remove brake assemblies.
a.
Removal
c. Cleaning. Clean mud and dirt from all exposed
WARNING
parts with water and stiff brush. Remove grease from
Weight of semitrailer must be supported
spindles of axles and wheel retaining parts with approved
by blocking or support stands placed
under rear corners of frame throughout
d. Inspection and Repair.
operation.
(1) Inspect for broken or cracked bracket
(1) Position semitrailer on level surface with
plate, spring guide brackets and torque rod brackets.
front end resting on landing gear. Jack up axle to be
Replace broken or cracked parts.
removed with hydraulic dolly high enough to allow
(2) Check bearing seating surfaces and oil
removal of wheels. Lift rear of semitrailer with hoisting
seal sleeve spacer (18, fig. 40) for roughness or
equipment (with floor jacks under axle and bracket
damage. File or grind smooth high spots, burrs, or
assembly) until weight of springs has been taken off
roughness.
axle. Block frame securely.
(3) Check threads of axle spindles for wear,
(2) Remove wheels and tires (paragraph 3-
crossed threads, or damage. Using fine file, remove
burrs or hand chase threads if necessary.
axle to be removed.
(4) Check axle spindles for bend. Indications
(3) Disconnect hydraulic hose to tee at center
of a bent axle spindle are binding bearings, which cannot
be adjusted properly, and extremely uneven wear of
(4) Disconnect torque rods (fig. 50) from axle
brake linings. Replace defective axle spindle.
(5) Check that axle meets requirements of
(5) Move axle on hydraulic dolly to free
repair standards listed in Repair Standards, Table 6-1.
springs from spring guide brackets. Move axle from
(6) The repair and rebuild standards included
under semitrailer chassis.
in Table 6-1 give the minimum, maximum, and key
b. Disassembly.
clearance of new or rebuilt parts. They also give wear
(1) Remove nut, lock washer and cap screw,
limits which indicate that point to which a part or parts
securing hydraulic line connector (fig. 4-38) to band on
may be worn before replacement in order to give
axle. Remove connector.
maximum service with minimum replacement. Normally,
(2) Remove three cap screws securing
all parts which have not been worn beyond the
hydraulic lines to each brake assembly.
dimensions shown under wear limits will be approved for
NOTE
service. Points of measurement for repair standards are
The key letters shown below in
illustrated in figure 6-1.
parentheses refer to figure 50.
6-1