TM 5-5420-280-23&P
0097 00
LOWER SUPPORT BOOM REPLACEMENT (Contd)
REMOVAL
WARNING
Lower support boom and launch boom are extremely heavy and
must be supported during removal and installation. Failure to
comply may result in injury or death to personnel.
CAUTION
Cap or plug all hoses, connections, and openings immediately after
disconnection to prevent contamination. Remove caps or plugs prior
to installation. Failure to do so may result in damage to equipment.
NOTE
Tag hoses for installation.
Have container ready to catch oil.
1.
Support lower support boom (11) and remove four snaprings (7) and two pins (9) from lower support
boom (11) and two hydraulic cylinder rod ends (4). Disconnect rod ends (4) from support boom (11)
and lower hydraulic cylinders (3) to ground.
2.
Attach lifting device and sling or chain to launch boom (15) and take up slack.
3.
Remove four fittings (6) and O-rings (5) from bearing shaft (1). Discard O-rings (5).
4.
Remove two screws (12), retaining plate (13), and straight pin (14) from launch boom (15) and
bearing shaft (1).
NOTE
It will be necessary to remove bearing shaft using a suitable
pulling device.
5.
Place dunnage or floor jack under lower support boom (11) and pull bearing shaft (1) out of lower
support boom (11), launch boom (16), and pallet (2).
6.
Remove lower support boom (11) from launch boom (15) and pallet (2).
7.
If damaged, remove two bushings (10) and (8) from lower support boom (11) and cylinder rod
ends (4).
INSTALLATION
NOTE
Apply a light coat of grease to all bushings, pins, and bearing shaft
at installation.
1.
If removed, install two bushings (8) and (10) on hydraulic cylinder rod ends (4) and lower support
boom (11).
2.
Position lower support boom (11) on pallet (2) and launch boom (16).
NOTE
Align holes for fittings and straight pin with openings on bottom of
launch boom at installation.
3.
Position lower support boom (11) and launch boom (15) with pallet (2) openings and slide bearing
shaft (1) through pallet (2), lower support boom (11), launch boom (15).
4.
Install straight pin (14) on launch boom (15) and bearing shaft (1) with retaining plate (13), and two
screws (12).
5.
Install four new O-rings (5) and fittings (6) on bearing shaft (1).
6.
Lift two hydraulic cylinders (3) and connect hydraulic cylinder rod ends (4) on lower support
boom (11) with two pins (9) and four snaprings (7).
7.
Remove chain or sling and lifting devices from launch boom (15).
8.
Install launch boom swivel drive. Refer to WP 0094 00.
9.
Install hydraulic lines. Refer to WP 0071 00.
10.
Install bearing shaft manifold. Refer to WP 0092 00.
11.
Install bridge pallet on CBT. Refer to TM 5-5420-280-10.
0097 00-2
