TM 5-5420-280-23&P
0023 00
BRIDGE SUPPORT WHEEL HUB AND TIRE, BEARINGS, AXLE BRACKET, AND SPRING SUPPORT
ASSEMBLY MAINTENANCE (Contd)
NOTE
There are four support wheels and spring support assemblies per
bridge quarter. Maintenance is performed the same way for each
support wheel and spring support assembly. This task covers
maintenance of one support wheel and spring support assembly.
It may be necessary to use spreader and puller to remove support
wheel from axle bracket.
REMOVAL
NOTE
Perform steps 1 and 2 to remove support wheel and axle bracket.
1. Remove snapring (1) from shaft (17), and pull support wheel hub (21) and support wheel tire (4)
evenly off shaft (17).
2. Remove four screws (16), lockwashers (15), and axle bracket (14) from spring support bracket (13).
Discard lockwashers (15).
NOTE
Perform steps 3 through 7 to remove spring support assembly.
There are four retainer support brackets per bridge quarter. One
retainer support bracket has a cutaway for clearance; three do not.
Illustration shows retainer support bracket with cutaway.
3. Tighten screw (6) to compress spring (7) until washer (5) is clear of retainer support bracket (9).
4. Remove four screws (18), spacers (20), and plate (19) from spring support bracket (13) and support
bracket (8).
5. Loosen screw (6) until screw (6), washer (5), and spring (7) can be removed from spring support
bracket (13).
6. Remove four screws (10), washers (11), and retainer support bracket (9) from support bracket (8).
7. If damaged, replace threaded inserts (12). Refer to WP 0029 00.
DISASSEMBLY
1. Remove two snaprings (2) and bearings (3) from hub (21).
2. If support wheel tire (4) is damaged, remove support wheel tire (4) from hub (21).
CLEANING AND INSPECTION
WARNING
Skysol 100 mixture is combustible. Use mechanical ventilation
whenever product is used in a confined space. DO NOT use or
store near heat, sparks, flame, or other ignition sources, Keep
container sealed when not in use.
Contact with Skysol 100 may cause skin irritation. Use chemical-
resistant gloves. In case of skin contact, remove any contaminated
clothing and wash skin thoroughly with soap and water. Wash
contaminated clothing before reuse. Eye contact may cause
irritation, tearing, or blurring of vision, Use face shield or goggles
when eye contact may occur. In case of eye contact, flush eyes with
large amounts of water for at least fifteen (15) minutes or until
irritation subsides. Inhalation may cause irritation to upper
respiratory passages. DO NOT have food or drink in the vicinity.
1. Clean support wheel hub (21) and bearings (3) with Skysol 100 and dry with cloth before inspection.
0023 00-2