Machine Gradeability; All Motion Alarm; Four Wheel Drive; Electrical Power Outlet - Snorkel TB66JRT Operator's Manual

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
measurement.
5. Use the formula in Figure 8.6 to calculate the percent
of the grade.

Machine Gradeability

The gradeability specification for four-wheel drive TB66J
aerial platforms is 30%. An actual gradeability of 30%,
indicates that in most normal working conditions the
machine can be driven on a slope with an angle of 16.5
degrees.
The gradeability specification for two-wheel drive TB66J
aerial platforms is 25%. An actual gradeability of 25%,
indicates that in most normal working conditions the
machine can be driven on a slope with an angle of 14
degrees.

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.
TB66J – 0083740
Length
Ground Slope
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 on the left side of the wiring box
(refer to Figure 8.8). Unplug the source of power before
moving the aerial platform.
Figure 8.8 – Wiring Box

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 pro-
duce 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
temperature is at least 100°F (38°C). Refer to Cold
Weather Start-Up for a hydraulic oil warm-up proce-
dure.
To supply power to the electrical power outlet, start the
engine and place the machine/generator selector switch
(refer to Figure 8.9) in the generator position.
Chapter 8 – Operation
55