TM 5-5420-280-23&P
0089 00
LOWER SUPPORT GUIDE ROLLERS, LOWER ROLLERS, AND SKID PLATES REPLACEMENT (Contd)
NOTE
Removal and installation of all support rollers and skid plates are
performed the same way. Only one support guide roller and skid
plate is shown.
a. Lower Support Guide Roller Removal
1. Start Launch Power Unit (LPU) or CBT, remove retaining pin from launch boom and depress KY1
and KY18 control valves simultaneously to lower launch boom to 0-degrees position. Release control
valves and shut down CBT or auxiliary engine.
2. Remove screw (1) and washer (2) from pin (12).
3. Remove pin (12) and guide roller (16) from roller track frame (4).
4. Remove lube fitting (11) from pin (12).
5. Remove washer (17), two retainers (13), ball bearings (14), and grease ring (15) from guide roller
(16).
b. Lower Rollers Removal
NOTE
Removal and installation of lower rollers are performed the same
way. One side roller is shown.
Inner bearing hub is welded to roller trackframe. If bearing hubs
are damaged, install a new lower roller track frame.
1.
Remove three screws (6), cover (7), and lower roller (5) from inner bearing hubs (8) on roller track
frame (4).
2.
Remove lube fitting (3) from inner bearing hubs (8).
3.
Repeat steps 1 and 2 to remove other three lower rollers (5).
c. Skid Plate Removal
Remove two screws (9) and skid plate (10) from top of roller track frame (4).
d. Skid Plate Installation
Install skid plate (10) on top of roller track frame (4) with two screws (9).
e. Lower Rollers Installation
NOTE
Apply a light coat of grease to all parts at installation.
1.
Install lower roller (5) on inner bearing hub (8) with lower cover (7) and three screws (6).
2.
Install lube fitting (3) on inner bearing hub (8) and grease lower roller (5).
3.
Repeat steps 1 and 2 to install other three lower rollers (5).
f. Lower Support Guide Roller Installation
NOTE
Apply a light coat of grease to bearings and pin at installation.
1.
Install grease ring (15), two ball bearings (14), retainers (13), and washer (17) on guide roller (16).
2.
Install guide roller (16) on roller track frame (4) with pin (12), washer (2), and screw (1).
3.
Install lube fitting (11) on pin (12) and grease guide roller (16).
4.
Start LPU or CBT and depress KY1 and KY19 control valves simultaneously to raise launch boom
to +90-degrees position. Install retaining pins on launch boom.
0089 00-2
