Secondary Lift Cylinder

(6) Install the wiper ring (3) and the packing

(1) Remove the primary lift cylinder (para 5-

(4) in the gland (2). Install the pin (5).

9).

(7) Install the gland assembly into the cylinder

(2) Remove the bleed screw (1, fig. 5-15).

tube (11).

Insert a high pressure air hose into bleeder screw

e. Installation.

hole. With the lift control lever held in the DOWN

(1) Attach a chain securely around the

position, blow the oil out of the cylinder back into

cylinder assembly. Install the cylinder in the mast

the reservoir.

assembly.

(3) Disconnect the high pressure hose.

(2) Secure the cylinder assembly to the mast

(4) Disconnect hydraulic lines to the cylinder.

with its mounting hardware.

Cap or plug openings.

(3) Attach lift chains to the cylinder end (TM

(5) Remove the mounting hardware securing

10-3930-624-12).

the upper and lower ends of the cylinder to the mast

(4) Install the carriage backrest (para 6-3).

assembly.

(5) Reconnect all hydraulic lines to the

(6) Use a chain hoist to lift the intermediate

cylinder.

mast assembly approximately six inches, and block

(1) When the cylinder assembly has been

in place.

installed, run the lift to the extreme upper limit.

(7) Carefully remove the cylinder assembly.

b. Disassembly. (fig. 5-15).

then open the bleeder screw (1, fig. 5-14) one or

(1) Place the cylinder in a vise. Remove the

two turns. Allow the trapped air and foamy oil to

end head (2). Remove the bearing (3) and the ram

run out. When a clear stream of oil appears, tighten

(4) from the end head. Remove the seal (5) and

the bleeder screw.

wiper ring (6) from the ram. Remove the preform-

5-10. Secondary Lift Cylinder

ed packing (7) and ring (8) from the end head.

a. Removal.

5-16