TM 9-2330-271-14&P
rebore, removing as little metal as necessary to true
friction surface. After boring, check that drum meets
requirements of repair standards listed in table 6-1 and
figure 6-1. If refinishing requires removal of more than
one-sixteenth of an inch of material (one-eighth of an
inch in diameter), replace drum.
6-5.
Axle and Bracket Assembly Seat
NOTE
The key letters shown below in
parentheses refer to figure 26 except
where otherwise indicated.
a. Removal.
(1) Support weight of semitrailer by jacking up
axle and bracket assembly at end from which spring seat
is to be removed
(2) Remove four nuts and lockwashers from
two U-bolts and remove U-bolts (fig. 4-39). Lift off
spring seat on top of spring assembly.
(3) Loosen two bolts (13) from inner face of
spring seat (15) and raise ends of main axles until
bottom of spring assembly and center bolt clears top of
spring seat
(4) Remove six bolts (22) and lock washers
(21) and remove access cover (20) and gasket (19).
Figure 6-4. Installation of new axle.
Discard gasket if defective.
(5) Remove adjusting nuts (17) and key
(1) Connect hydraulic hose to tee at center of
washer (18), using wrench NSN 5120-00-795-0059.
axle.
Remove outer tapered bushing (11)
(2) Insert rubber wrappers (4) in position in
(6) Remove spring seat assembly (15) using
equalizing arms (3).
slight rocking motion (left and right) while carefully sliding
(3) Position axle in equalizing arms (3).
seat out and away from axle and bracket assembly (1).
(4) Place support under axle.
It is possible inner bearing cup (12) will remain in spring
(5) Check rubber wrappers (4) to make
seat.
certain they are not pinched.
(7) Remove inner tapered bushing (11),
(6) Place rubber pads (5) in axle connection
encased seal (9), packing retainer (8), flat washers (6
caps (6).
and 7) from axle and bracket assembly (1) Discard
(7) Place axle connection caps (6) under axle
seals.
and insert rod bolts (1) and (2).
b. Cleaning. Clean mud and dirt from all exposed
(8) Secure bolts (1) and (2) with eight nuts (8)
parts with water and stiff brush. Remove grease from
and washers (7).
spring seat parts with approved cleaning solvent
(9) Torque nuts (8) alternately until axle
connection caps (6) and equalizing arms (3) are a tight
c. Inspection and Repair.
fit, metal to metal.
(1) Inspect for broken or cracked parts.
(10) Install hubs and drums (paragraph 4-47).
Replace broken or cracked parts.
(11) Install wheels (paragraph 3-18b).
(2) Check bearing seats and oil seal surface
(12) Connect hydraulic hoses
on bracket for rough spots or damage. File or grind
(13) Close air reservoir drain cock.
smooth high spots, burrs, or roughness. Check that
(14) Remove blocking and support equipment
parts meet the requirements of repair standards listed in
table 6-1 and figure 6-1.
6-4.
Brake Drum
(3) Replace any part that does not meet
these standards.
If inspection (paragraph 4-47d) reveals brake drum to be
out of round or excessively scored,
6-6
