CUSTOM TRUCK LOAD KING 25-92, Installation Manual

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INSTALLATION REQUIREMENT S
AXLE LOADING CALCULATION PROCEDURE
1. Bare chassis axle weights.
Weigh both the front and rear axles of the bare
chassis to determine initial axle loading, enter
these figures at the top of the Axle Loading Cal­
culation Worksheet.
Note: a tandem axle is treated as one axle
during calculations. Rear axle weight is
measured with entire tandem on the scale in
this case. Wheelbase is measured from cen­
ter of front axle to center of rear tandem.
2. Determine location of subframe
You must pick a location for your subframe to
begin calculations. This is expressed as dis­
tance from the truck cab. Refer to the C.G. Mea­
surement Diagram for clarification. Typical
Subframe locations are shown in the following
table.
Note: Truck frame cross member placement
must also be taken into account before deter­
mining subframe placement. Using the sub­
frame as
a
guide, determine if there will be
any interference between truck frame cross
members and the mainframe tiedowns. Adjust
subframe location as necessary.
3. Measure front axle to subframe distance.
Every truck model has a different cab length,
therefore you must measure the distance from
the center of the front axle to the front of the
subframe location you have just determined.
Note: if there is a component listed in the
worksheet that is not part of your particular
installation, ignore it and leave it out of any
calculations you make.
4. Installed crane and jib CG locations:
These locations are calculated by adding the
given CG location figures to the measured dis­
tance from the center of the front axle to the
leading edge of the subframe.
CG Location (from fold-out table)
+ Front axle to Subframe distance (measured)
= Installed CG Location
Use the Installed CG Location figure to calcu­
late the rear axle weight for each of these com­
ponents. Refer to the C.G. Measurement
Diagram for reference. This is also shown in the
Axle Loading Calculation Example.
5. Measure component distances.
Using Section 3 of this manual as a guide, mea­
sure the distance from the center of the front
axle to the proposed location for each compo­
nent listed in the Axle Loading Calculation­
Worksheet and enter the values into the
worksheet per the Axle Loading Calculation
Example.
6. Enter component weights.
Locate your crane model on the Component
Weight Reference Table and enter the compo­
nent weights from this column into the Axle
Loading Calculation Worksheet in the appro­
priate blank of the rear axle column.
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9
Note: components that are located in
front of the front axle should be calculated
using a negative distance. This will result in a
negative weight on the rear axle for that
component. This is correct and the value
should be sub-tracted when totaling the rear
axle weight. You
will also get a negative front
axle weight for items located behind the rear
axle
CAB TO SUBFRAME DISTANCE 25-92: 15"