Figure 5-12. Rod Seal Installation
g.
Install retaining nut (6) on rod (8). (Main cylinder only.)
h.
Generously lubricate the inside diameter of the end gland (5) with a non-fibrous U bearing grease, then carefully
slide the end gland onto the rod (8). Make certain the rod wiper (14) does not catch on the rod when it is first
started. Slide the end gland all the way onto the rod.
i.
Install the piston (10) on the rod (8) and install nut (9). Tighten nut.
j.
Generously lubricate the outside diameter of the piston (10) and end gland (5) with a non-fibrous bearing grease.
Also lubricate the threads and beveled area of the top of cylinder tube (7).
k.
With a side-to-side or up-and-down motion, work the piston (10) into the tube (7). Slide the piston into the tube.
l.
With a rotating motion, work the o-ring (13) into the tube (7).
m. Hand tighten the end gland (5) on extension cylinder; or retaining nut (6) on main cylinder.
n.
Clamp the cylinder in a vise as in disassembly, then tighten the end gland (5) or retaining nut (6) to 250 ft-lbs.
o.
Install holding valve (4), screws (3), elbow (2) and tube (1).
5-7.6 Control Valve. (Figure 5-13)
NOTE
The control valve consists of four electrically activated valve
sections and two end sections. It is recommended that repair of the
valve be limited to replacement of a malfunctioning valve section.
However, if a new section is not available, the valve section may be
disassembled and seals and springs replaced.
5-7.5.1 Removal.
a.
Open the valve bank cover in the base of crane. Move control pendant and cable out of way.
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