Gradall 544D (9136-4003) Service Manual - Manual (Page 305)

2.1
B OOM H YDRAULICS
Hydraulic oil is delivered to the end of the boom to power the tilt carriage and/or optional
equipment by a series of hoses and tubes. There is an extend ible/retractable Hydraulic
Sub-Assembly mounted inside the booms which allows the hoses to move proportional with
the boom. The sub-assembly is fastened to the bottom of boom-section 4 and the fear of
boom-section 3.
See Section 7
Hydraulic hoses are also fastened to a Hose Take-Up Weldment at the bottom front of
boom-section 1, fed to the rear of the boom around a hose sheave to the tubing mounted
on the hydraulic sub-assembly. These hoses also move proportional with the boom.
Whenever an optional electric circuit is supplied, the electric cable is fed to the end of the
boom and the attachment using the same routing as the hydraulics.
See Section 7 and Section 8
Note!
Comprehensive boom assembly
details are covered in Section 9.
B OOM- S ECTION 4:
S HOWING H YDRAULIC S UB-ASSEMBLY
GRADALL GRADALL