JLG G12-55A Service Manual - Manual (Page 54)

Boom
3-18 G10-55A, G12-55A
3.7 HOSE CARRIER ASSEMBLY
REMOVAL/INSTALLATION
Hose carrier assembly locates primarily in fourth boom
section. It is fastened at bottom front of fourth boom
section and at rear of third boom section.
3.7.1 Hose Carrier Assembly Removal
1. Remove any attachment from the quick coupler
assembly. Refer to Operation & Safety Manual.
Note: Allow adequate room in front of the machine
when removing and installing the hose carrier assembly.
2. Park the machine on a hard, level surface, level the
machine, fully retract the boom, level the boom,
place the transmission control lever in (N)
NEUTRAL, engage the park brake and shut the
engine OFF.
3. Place a Do Not Operate Tag on both the ignition key
switch and the steering wheel.
4. Open engine cover. Allow system fluids to cool.
5. Properly disconnect the batteries.
6. Loosen and remove both compression springs (1)
from the hose take-up weldment at the bottom of the
first boom section.
7. Label and disconnect the tilt and auxiliary hydraulic
hoses attached to the hose carrier at the rear of the
boom and at the front of the boom head. Plug and
cap the hose ends to prevent dirt and debris from
entering the hydraulic system.
8. If equipped, label and disconnect any electrical
connections at front and rear of boom assembly.
Note: Tag or identify each hose to the corresponding
fitting it was removed from.
9. Loosen and remove both cap screws and locknuts
(2) from the hose carrier bracket at the front of the
fourth boom section.
10. Loosen and remove the guide bracket (3) from the
front of the fourth boom section.
11. Loosen and remove the hose carrier bracket (4) at
the rear of the third boom section.
12. Install a sling around hose carrier at front of boom.
With a suitable lifting device, slowly pull hose carrier
loose from bottom bracket (5) located approximately
halfway in the fourth boom section.
MY2690
1
MY2710
1
3
2
MY2720
1
4
MY2700
5
FRONT