Hardi Ranger 550, Instruction Book

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3 - Description
3.6
Boom
Boom and terminology
The SPB boom is available in three different hydraulic system versions – all equipped with I.A.H. (Indirect Acting Hydraulics)
and named:
1 . SPB-HY
This type of boom is operated via the tractor hydraulics. This model features hydraulic lift cylinders for boom height
adjustment and two cylinders for simultaneous boom wing fold and unfold.
2. SPB-HV
This type of boom has the same features as the above mentioned HY-model, but is provided with more advanced hydraulics.
This model features hydraulic lift cylinders for boom height adjustment and two cylinders for individual boom wing fold and
unfold. The SPB-HV hydraulics are controlled with an electrical hydraulic control box.
3. SPB-HZ
This type of boom has the same features as the above mentioned HV-model, but also has two boom wing tilt cylinders. This
model features hydraulic lift cylinders for boom height adjustment, two tilt cylinders and two fold cylinders that give the
ability to obtain individual boom wing tilt as well as individual boom wing fold. The SPB-HZ hydraulics are controlled with
an electrical hydraulic control box.
Outer sections incorporate spring loaded breakaway and all booms have bi-fold wings.
The SPB boom is available in 45’ & 60’ working width.
For bi-fold booms the terminology is as follows:
A - Breakaway section
C - Outer section
E - Inner section
F - Center section