LOWER SUPPORT BOOM CYLINDERS REPLACEMENT (Contd)
Removal and installation of right and left lower support boom
cylinders are performed the same way. Left side lower support
boom cylinder is shown.
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.
Tag hoses for installation.
Have container ready to catch oil.
Disconnect hoses (8) and (16) from adapter (9) and elbow (17) on cylinder manifold (11).
Loosen screw (23) and disconnect electrical connector (24) from pressure switch (25).
Remove pressure switch (25) and O-ring (22) from adapters (26). Discard O-ring (22).
Loosen two nuts (20) and remove steel tube (21) and two tube seals (19) from adapters (26) and (9).
Discard tube seals (19)
Lower support boom must be supported on dunnage before
cylinders are removed. Failure to comply may result in injury or
death to personnel.
Secure lower support boom (4) from moving when lower support boom cylinder (7) is removed.
Attach a lifting sling around lower support boom cylinder (7) and connect to lifting device. Take up
slack in sling.
Remove four snaprings (1) and pins (2) and (14) from lower support boom cylinder (7), support boom
brackets (3), and crossmember brackets (12) on bridge pallet (13).
Lift lower support boom cylinder (7) from bridge pallet (13) and place on ground.
If replacing cylinder, note quantity and thickness of shims on end of
shaft. Replace as necessary.
If damaged or worn, remove bushings (5) and (15) from ends of lower support boom cylinder (7).
Remove elbow (17), adapters (9) and (18), and two O-rings (10) from cylinder manifold (11). Discard