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

3-19 G10-55A, G12-55A
Boom
13. When the hose carrier is pulled approximately 25%
out of the boom, fasten the two hydraulic carriers
together using plastic tie wraps or nylon straps to
keep them from separating.
Note: Do Not wrap hose carrier since it will not prevent
two hydraulic carriers from moving apart sideways.
14. Continue withdrawing the hose carrier, fastening the
two hydraulic carriers together.
15. With two hose assemblies tied together, remove
hose carrier and set on ground or proper supports.
3.7.2 Assembling Hose Carrier Assembly
The following procedure is described with the assumption
that all components have been removed and assembly
proceeding from the beginning.
1. Place both sections on a suitable stand or support.
2. Install the wear pad to the bottom of the upper
hydraulic carrier.
3. Install bulkhead fittings to each hydraulic carrier.
4. Install the tube assemblies to the bulkhead fittings
on each hydraulic carrier.
5. Install the cushion clamps to the tube assemblies
and secure to each hydraulic carrier.
6. Install the hose carrier to each hydraulic carrier and
install each tilt hose and auxiliary hose to the proper
fitting or tube connection.
7. Tie wrap the hydraulic hoses together where they
extend from each end of the hose carrier.
8. Fasten the two hydraulic carriers together using
plastic tie wraps or nylon straps for stability.
3.7.3 Hose Carrier-Assembly Installation
1. Clean and lubricate the side surfaces where the hose
carrier rides.
2. Fully collapse the hose carriers and secure together
using plastic tie wraps or nylon straps to keep them
from separating.
3. Install a sling around the balance point of the hose
carrier. With a suitable lifting device, slowly insert the
hose carrier into the front of the fourth boom section.
4. Remove the first plastic tie wrap or nylon strap as
the hose carrier is being inserted into the front of the
fourth boom section.
5. Continue inserting the hose carrier and removing the
plastic tie wraps or nylon straps until the hose carrier
is fully inserted into the boom.
6. Install guide bracket (1) on front of hose carrier.
7. Verify that bottom bracket (2) on hose carrier is in
place on bottom plate (3) of fourth boom section.
8. Install the cap screws, washers and nuts to the hose
carrier bracket at the rear of the third boom section.
9. Install both cap screws and locknuts to hose carrier
bracket at front of fourth boom section.
10. Uncap and reconnect the previously labeled tilt and
auxiliary hydraulic hoses to the proper fittings at the
rear of the hose carrier.
MY2730
MY2740
1
MY2700
3
FRONT
2