TM 5-5420-280-23&P
0087 00
LAUNCH BOOM GUIDES REPLACEMENT (Contd)
REMOVAL
NOTE
There are two flat roller guides on launch boom and two cone roller
guides on roller track frame. This procedure will cover removal and
installation of one flat roller guide and one cone roller guide.
Measure distance between flat roller and side of launch boom, and
record measurement for installation.
1.
Start Launch Power Unit (LPU), remove retaining pins on launch boom and depress KY1 and KY18
control valves simultaneously to lower launch boom (2) to 0-degrees position. Release control valves
and shut down LPU.
2.
Remove screw (1), adjustable bushing (11), flat roller guide (10), and washer (6) from welded
block (9) on launch boom (2).
NOTE
Measure distance between cone roller and pin wheel drive gear, and
record measurement for installation.
3.
Remove screw (3), adjustable bushing (4), cone roller guide (5), and washer (6) from welded
block (8) on roller track frame (7).
4.
Perform steps 2 and 3 to remove other two roller guides.
INSTALLATION
NOTE
Apply a light coat of grease to adjustable bushings at installation.
Ensure rollers are adjusted to measurement recorded during
removal prior to tightening screws.
1.
Install washer (6), cone roller guide (5), and adjustable bushing (4) on welded block (8) on roller
track frame (7) with screw (3). Hold adjustable bushing (4) in position and tighten screw (3).
2.
Install washer (6), flat roller guide (10), and adjustable bushing (11) on welded block (9) on launch
boom (2) with screw (1). Hold adjustable bushing (11) in position and tighten screw (1).
3.
Repeat steps 1 and 2 to install other two roller guides.
4.
Start LPU, depress KY1 and KY19 control valves simultaneously to raise launch boom to
+90-degrees position. Install retaining pins on launch boom.
0087 00-2
