TM 5-5420-280-23&P
0020 00
BRIDGE QUARTER REPLACEMENT (Contd)
INSTALLATION
NOTE
Apply grease to supporting pins and slide plates at installation.
Install supporting pin without spring as noted at removal.
1.
If removed, install two slide plates (2) on launch beam arms (1) with four screws (3).
2.
Install spring (4) and three supporting pins (5) on first side openings of launch beam arms (1) on
launch beam (6).
WARNING
Exercise caution when compressing pins and sliding bridge quarter
onto launch beam. Failure to comply may result in injury to
personnel.
NOTE
Assistant will help with steps 3 through 7.
3.
Using suitable lifting device, lift and slide bridge quarter (7) on launch beam arms (1) until bridge
quarter (7) contacts supporting pins (5) on each arm (1). Compress four supporting pins (5) until
bridge quarter (7) will slide up to top openings on launch beam arms (1).
4.
Install two springs (4) and four supporting pins (5) on top and bottom openings of launch beam
arms (1). Compress top and bottom supporting pins (5) until bridge quarter (7) will slide to next set of
openings on launch beam arms (1).
5.
Install two springs (4) and four supporting pins (5) on side openings of launch beam arms (1) and
compress side supporting pins (5) and slide bridge quarter (7) up to next set of openings on launch
beam arms (1).
6.
Install two springs (4) and four supporting pins (5) on top and bottom openings of launch beam
arms (1) and compress top and bottom supporting pins (5) until bridge quarter (7) will slide to closed
position.
7.
Remove lifting device from bridge quarter (7).
8.
Repeat steps 1 through 7 to install opposite bridge quarter (8) on launch beam (6).
NOTE
Ensure that all mounting hardware is tightened to metric standards
unless otherwise noted. Refer to metric torque limits in WP 0118 00.
9.
Install retaining wire rope assembly (10) on bracket (14) and pin hole (9) at ramp end of bridge
quarters (8) and (7) with pin (11), washer (12), and screw (13).
NOTE
Install spacer washers as noted at removal.
10. Install retaining wire rope assembly (18) on two brackets (15) at coupling end of bridge quarters (8)
and (7) with pin (19), washer (16), and new cotter pin (17).
11. Install bridge half on bridge pallet. Refer to WP 0018 00.
3
2
4
1
5
6
5
0020 00-4
