Snorkel AB80J - Manual (Page 57)

Chapter 8 – Operation
AB80J/AB85J – 0420453 53
Calculating Percent Grade
The percent grade equals the height (rise) of the slope di-
vided by the length (run) times 100. Refer to Figure 8.7.
Figure 8.7 – Percent Grade Formula
The grade can be measured with an inclinometer or by
using a tape measure, a level, and a straight 2x4. If us-
ing an inclinometer, refer to the conversion diagram if
necessary.
To measure the grade without an inclinometer, use the
following procedure.
1. With the 2x4 laying parallel with the slope, lay the
level lengthwise on the 2 x 4.
2. Holding the downhill end, raise the 2x4 until the
level indicates that the board is level (refer to Figure
8.8).
Figure 8.8 – Percent Grade Calculation
3. Use the tape measure to measure the distance
(height) from the end of the 2x4 to the ground. Record
the height distance.
4. Measure the length of the 2x4 and record this mea-
surement.
5. Use the formula in Figure 9.2 to calculate the percent
of the grade.
Machine Gradeability
The gradeability specification for the AB80J/A80J and
AB85J/A85JRT aerial platforms is 20%. An actual grade-
ability of 20%, indicates that in most normal working
conditions the machine can be driven on a slope with an
angle of 11.3 degrees.
Electrical Power Outlet
The electrical outlet at the platform has 2, 3-prong, 125
volt AC electrical connectors. Their combined output is
limited by a 15 amp circuit breaker.
Power may be supplied to the outlet using an external
power source or by operating the optional AC generator.
To use the outlet, plug a source of power into the power-
input connector on the left side of the turntable (refer to
Figure 8.9). Unplug the source of power before moving
the aerial platform.
Figure 8.9 – Power-Input Connector
AC Generator
The generator supplies power to the electrical outlet only
when the engine is running and the machine is stationary.
The machine functions will not operate when the machine/
generator selector switch is in the generator position.
Caution
Cold hydraulic oil does not flow well and may produce
improper generator output voltage. Improper outlet
voltage can damage some electrical power tools and
equipment. Warm the hydraulic oil before operating
the generator.
Do not operate the generator unless the hydraulic oil tem-
perature is at least 100°F (38°C). Refer to Cold Weather
Start-Up for a hydraulic oil warm-up procedure.
Use the following procedure to supply power to the elec-
trical power outlet if the machine is equipped with the
optional generator.
1. Plug the generator cord into the outlet on the left side
of the turntable (refer to Figure 8.9).
2. Start the engine and place the machine/generator
switch (refer to Figure 8.10) in the generator position.
Length
Height
Length
Height
% of Grade = x 100
Length
Height
Ground Slope
Power-Input
Connector