HYDRAULIC SYSTEM TUBING AND HOSES REPLACEMENT (Contd)
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.
All hydraulic system tubing and hoses are replaced the same way.
This task covers replacement of one hydraulic tube and hose from
the rear pinwheel drive brake on the launch boom.
Tag tubing and hoses for installation.
Have container ready to catch oil.
Loosen nut (3) on hose (4) and remove hose (4) from adapter (19) on side of stop cylinder (1).
Loosen nut (5) on other end of hose (4) and remove hose (4) from adapter (6) on tube (12).
Loosen nut (13) on tube (12) and remove tube (12) and tube seal (14) from adapter (16) on launch
boom main shaft (15). Discard tube seal (14).
Remove two screws (11), retainer plates (10), rubber tube retainers (9), and tube (12) from launch
boom tube support brackets (17) and (18) on launch boom (2).
Loosen nut (8) and remove adapter (6) and tube seal (7) from tube (12). Discard tube seal (7).
Install tubing and hoses as noted at removal.
Install adapter (6) on end of tube (12) with new tube seal (7) and tighten nut (8).
Install tube (12) on launch boom tube support brackets (17) and (18) with two rubber tube
retainers (9), retainer plates (10), and screws (11).
Install other end of tube (12) with new tube seal (14) on adapter (16) of launch boom main shaft (15)
and tighten nut (13).
Install hose (4) on adapter (6) of tube (12) and tighten nut (5).
Install other end of hose (4) on adapter (19) of stop cylinder (1) and tighten nut (3).
The pallet hydraulic system is self-bleeding, and with exception of
the telescopic tube hydraulic cylinders, there is no requirement for
Operate hydraulic system and check for leaks TM 5-5420-280-10.