Calculating Percent Grade; Machine Gradeability; All Motion Alarm; Four Wheel Drive - Snorkel AB60J Operator's Manual

Chapter 8 – Operation

Calculating Percent Grade

The percent grade equals the height (rise) of the slope di-
vided by the length (run) times 100. Refer to Figure 8.6.
Height
% of Grade =
Figure 8.6 – Percent Grade Formula
The grade can be measured with an inclinometer or by
using a tape measure, a level, and a straight 2 x 4. If
using an inclinometer, refer to the conversion diagram
if necessary.
To measure the grade without an inclinometer, use the
following procedure.
1. With the 2 x 4 laying parallel with the slope, lay the
level lengthwise on the 2 x 4.
2. Holding the downhill end, raise the 2 x 4 until the
level indicates that the board is level (refer to Figure
8.7).
Height
Figure 8.7 – Percent Grade Calculation
3. Use the tape measure to measure the distance
(height) from the end of the 2 x 4 to the ground.
Record the height distance.
4. Measure the length of the 2 x 4 and record this mea-
surement.
5. Use the formula in Figure 8.6 to calculate the percent
of the grade.

Machine Gradeability

The gradeability specification for the AB60J/AB60JRT
aerial platforms is 20%. An actual gradeability of 20%,
indicates that in most normal working conditions the
machine can be driven on a slope with an angle of 11.3
degrees.
50
Length
Height
x 100
Length
Length
Ground Slope

All Motion Alarm

The optional all motion alarm sounds loud intermittent
beeps anytime the machine functions are being oper-
ated.

Four Wheel Drive

The machine may be equipped with a four wheel drive
system. This system operates full time and requires no
action by the operator.
Four wheel drive machines have a "4x4" decal on each
side of the chassis and all four of the wheel hubs are drive
hubs and look the same.

Electrical Power Outlet

The electrical outlet at the platform has 2, 3-prong, 110
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 located inside the rear of the turntable
(refer to Figure 8.8). Unplug the source of power before
moving the aerial platform.
Power-Input
Connector
Figure 8.8 – Power-Input Connector

AC Generator

The optional 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.
AB60J – 0181972