Boom; Boom And Terminology - Hardi COMMANDER TWIN FORCE Instruction Book

3 - Description

Boom

Boom and terminology

The TWIN FORCE boom are found in two hydraulic versions which is suspended in a strong, stable parallelogram boom lift:
• HAY boom:
Working widths are 18, 20, 21, 24, 27, 28 and 30 metres.
The boom is pendulum suspended and equipped with 4 hydraulic rams. The raising/lowering and folding/unfolding
functions are operated via the tractor hydraulics.
• HAZ boom:
Working widths are 18, 20, 21, 24, 27, 28, 30, 32, 33 and 36 metres.
The boom is pendulum suspended and fully hydraulically operated, all functions are controlled via the Direct Acting
Hydraulic System (D.A.H.). The 32-36 metres booms is fully hydraulically operated, all functions are controlled via the
Direct Hydraulic System (D.H.).
Boom features
• All booms are 2-folded.
• TWIN blowers. These are driven by a built-in hydrostatic transmission powered via the tractor P.T.O. Blower speed can
be adjusted step wise from the tractor cabin.
• Outer sections incorporate spring-loaded breakaway.
• Hydraulic pendulum lock (HAZ only).
• Individual boom tilt control (HAZ only).
• Individual folding of outer sections. This enables alternative boom widths.
The boom can be used in half folded position. Half folded lengths are the following:
Full working width
18 metres
20 metres
21 metres
24 metres
27 metres
28 metres
30 metres
32 metres
33 metres
36 metres
For 2-folded booms the terminology are as follows:
A. Breakaway section
C. 1st outer wing
E. Inner wing
F. Centre section
28
1/2 folded
12 metres
12 metres
12 metres
12 metres
14 metres
14 metres
15 metres
17 metres
17 metres
18 metres