Snorkel TB65J - Manual (Page 50)

Chapter 8 – Operation
46 TB65J – 0084248
Note
If the machine has a GM engine, there will be a 7 to 10
second delay after starting the engine, before the throttle
will go to mid or high. Start the engine and wait 10 seconds
before proceeding with machine operation.
9. Let the engine warm to operating temperature.
Boom Operation
Use the following procedure to operate the turntable,
boom, or platform functions.
. Step down on the platform foot switch (refer to Figure
8.4). This switch must be held down to operate the
upper controls.
Figure 8.4 – Platform
2. Hold the appropriate control in the desired direction.
Always look in the direction of movement.
3. Gradually turn the boom speed knob to control the
boom extend/retract, jib and platform function speed.
4. To stop movement release the control to its neutral
position or release the foot switch.
Driving and Steering
Danger
The aerial platform can tip over if it becomes unstable.
Death or serious injury will result from a tip-over acci-
dent. Do not drive an elevated aerial platform on soft,
uneven, or sloping surfaces. Do not drive the machine
on grades that exceed the machine specification.
For operation of two wheel drive machines on grades up
to 25 percent, or four wheel drive machines on grades
up to 30 percent, it is recommended that the main boom
be near horizontal and the jib be elevated just enough to
provide adequate ground clearance.
A 25 percent grade is a 30″ (0.76 m) vertical rise in 0′
(3.05 m) horizontal length.
A 30 percent grade is a 36″ (0.9 m) vertical rise in 0′
(3.05 m) horizontal length.
Avoid driving with the platform over the front end of the
chassis. In this position the machine is difficult to control
because:
• Drive and steer control movements and their resulting
machine movements are reversed.
• When driving fast, sudden turns or stops produce
more severe reactions to platform occupants.
• More turning space is required to prevent the platform
from colliding with obstacles several feet beyond the
path of the tires.
Warning
Death or serious injury could result from improperly
driving or steering the aerial platform. Read and un-
derstand the information in this manual and on the
placards and decals on the machine before operating
the aerial platform on the job.
The blue and yellow arrows on the chassis indicate the
direction the chassis will move when the drive or steer
control is moved toward the corresponding color.
When the machine is in the stowed position, with the
booms centered between the rear wheels, the direction
of drive and steer control movement corresponds with
the direction of chassis movement.
When the turntable is rotated from the stowed position,
with the booms to either side of or in front of the chassis,
the direction of control movement does not correspond
with the direction of chassis movement.
• To avoid confusion, always drive to the work area
or move between work areas with the turntable and
booms in the stowed position.
• After arriving at the work area, the booms may be
positioned to the side or the front of the chassis for
final positioning.
• Always look in the direction of movement as indicated
by the directional arrows on the chassis.
Use the following procedure to operate the drive and
steer functions.
. Determine the desired drive range for the specific
driving conditions. Place the switch in the appropriate
position to achieve the desired drive wheel opera-
tion.
• Use high range (rabbit) when traveling across
firm, flat, level surfaces. High range can only be
activated when the booms are stowed. High range
is for high speed, low torque operation.
Platform Foot
Switch
Lanyard Anchors