Fig. 6-117: 4-Section Boom Extension Cylinder Installation - JLG Lull 1044C-54 II Series Service Manual

Boom and Transfer
Removal, Extension Cylinder
6-112
2 3
1
15
# Description
1 Rod Nut
2 Socket Setscrew
3 Extension Cylinder Rod Boss
4 Middle (Rear) Boom Section
5 Boom Extension Cylinder
6 Outer Boom Section
7 Capscrew
8 Flatwasher

Fig. 6-117: 4-Section Boom Extension Cylinder Installation

(Ref. Fig. 6-117) The following steps are required to remove the boom
extension cylinder.
1. Follow preparation procedures as outlined in Section 3 and "General
Hydraulic Maintenance Practices" on page 5-3 of this manual.
2. Disconnect any attachments and raise the boom enough so that
access to the rear of the extension cylinder is possible. Apply the park
brake, retract the cylinder, and shut the engine off.
3. Support the boom and extension cylinder with sling(s) and crane or
other suitable means. Make sure support items have sufficient capacity
to support the weight of the boom and cylinder; the combined weight of
the boom and extension cylinder is approximately 6650 pounds.
12 13
11
6
8 9
7
4
5
#
9 Elbow
10 Hydraulic Tube
11 Extension Cylinder Base Mount
12 Shim
13 Shim
14 Nut
15 Lead Ball
14
10
MV0160
Description
31200079