CRANE INSTALLATION 800D
10-6
Published 5-27-2018 Control # 039-06
COUNTERWEIGHTING
1. Refer to “Mounting Configuration” pages in this section.
The amount of counterweight and its location is
dependent upon the stability working area (180° behind
the truck or 360° around the truck), the weight of the
truck and all permanently attached equipment.
Permanently attached equipment which can be
considered as counterweight includes the bed,
reinforcing, PTOs and pumps, tool boxes, etc. The
torsion resisting subbase and rear stabilizers are
considered part of this crane and not part of the
counterweight. Additional counterweight is usually
added to the underside of the bed and/or to the torsion
resisting subbase. On some trucks, a heavy front
bumper may also be required for stability around the
rear.
2. The 85% tipping factor as outlined in OSHA and ANSI
specifications means that when lifting the full capacity
loads most likely to cause the truck (with outriggers and
stabilizer set) to overturn, the unit is at 85% of tipping
over. Increasing this full capacity load by 117.6%
(overloading) will cause the unit to tip over.
3. In order to determine the amount of counterweight
required, it is necessary to add up the weight that each
permanently attached piece of equipment will place on
the front and rear axles of the truck along with the initial
truck chassis weight and then compare the total front
and rear axle weights with the weights listed on the
“Mounting Configuration” (Installation Section) pages to
determine the amount and location of counterweight
required.
Example
A typical truck is shown below with all the permanently
attached equipment also shown. A Series 8100D crane will
be mounted on this truck and a 180° stability working area
around the rear of the truck is desired as in “Configuration 1”
(See ““Configuration 1 — 8100D” on page 4”.
(1752 mm)
69 in
(1752 mm)
69 in
8000 lb
(3628 kg)
INITIAL
CHASSIS
WEIGHT
150 lb
(68 kg)
PUMP &
PTO WT
60 in
(1524 mm)
0 in
7000 lb
(3175 kg)
INITIAL
CHASSIS
WEIGHT
1456 lb
(660 kg)
BED WT
(6629 mm) 261 in
(6832 mm) 269 in
22 ft BED
9449
Fo
r
Reference
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