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

Boom
3-20 G10-55A, G12-55A
3.8 HOSE CARRIER ASSEMBLY
REMOVAL/INSTALLATION
The hose carrier assembly locates primarily in the fourth
boom section. It is fastened at the bottom front of the
fourth boom section and at the rear of the third boom
section.
3.8.1 Hose Carrier Assembly Removal
1. Remove any attachment from the quick switch
assembly. Refer to the appropriate operation and
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, stating that the
machine should not be operated.
4. Open the engine cover. Allow the system fluids to
cool.
5. Properly disconnect the battery.
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 the front and rear of the 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 the hose carrier at the front of
the boom. With a suitable lifting device, slowly pull
the hose carrier loose from the bottom bracket (5)
located approximately halfway in the fourth boom
section.
MY2690
1
MY2710
1
3
2
MY2720
1
4
MY2700
5
FRONT