Gradall 544D (9136-4003) Service Manual - Manual (Page 323)

7.2
R EINSTALLING THE H YDRAULIC S UB- A SSEMBLY
Preparation
Clean and lubricate the inside of the boom sections where the hydraulic
sub-assembly rides.
Install the guide bracket.
Collapse the hydraulic sub-assembly fully.
Fasten both hydraulic carriers together (using tie-wraps or nylon straps).
Retract the booms fully, horizontal.
Reinstallation
Lift the hydraulic sub-assembly in a balanced mode and carefully begin insertion
into boom-section 4.
As the first lie-wrapped area nears the boom, remove the tie-wrap ond continue
insertion (and tie-wrap removal) until the sub-assembly is fully inserted.
Re-connect hydraulic hoses and any optional circuits.
Re-fasten bracket removed under “Preparation”, Step 5, Page 7.1.
Use long-threaded rod and nuts (3/8 x 16) to aid in pulling the bracket into place
if it protrudes too far from the back of the boom.
C OMPLETE B OOM A SSEMBLY: R EAR V IEW
Reinstall the hose take-up compression spring. Torque the jam nut to 100 ft-lb.
There should be 1" from the back of the jam nut to the end of the threads on the
hose take-up weldment.
See Figure Detail in margin
B OOM H EAD:
S HOWING H OSE T AKE-UP
W ILDMENT AT B OTTOM,
F RONT, B OOM- S ECTION 1
Torque all fasteners and hydraulic fillings per Appendix A, “Fastener Torque Chart”
and Appendix B, “Hose Fitting Torque Chart. “
Note!
Be certain the hydraulic
sub-assembly locks in place on
the pin bracket at the bottom of
boom-section 4.
1.
2.
3.
4.
5.
1.
2.
3.
4.
5.
6.
GRADALL GRADALL