Snorkel TB85J CE - Manual (Page 49)

Chapter 8 – Operation
TB80/TB85J – 0112622EE 45
Figure 8.7 – Platform
3. Hold the appropriate control in the desired direction.
Always look in the direction of movement.
4. Releasing the control to its neutral position, or re-
leasing the foot switch will stop movement.
Platform Overload Sensing System
Boom and drive functions are stopped when the platform
load reaches or exceeds rated capacity. The horn will
sound intermittently and the red light (refer to Figure 8.6)
will illuminate when the platform rated work load is ex-
ceeded.
The horn will sound and the light will flash until the ex-
cess load is removed from the platform. At that time, the
boom and drive functions are again operational.
If the overload exceeds rated platform capacity by more
than 20 percent, the system will error out, stopping all
boom and drive functions. The horn will then sound con-
tinuously and the red light will stay illuminated at the
upper and lower controls (refer to Figure 8.2).
The horn will sound and the light will stay on until the
excess load is removed from the platform and the start
switch is turned off and back on, resetting the system.
At that time, the boom and drive functions are opera-
tional.
A
Danger
The aerial platform can tip over if it becomes un-
stable. Death or serious injury will result from a tip-
over accident. Do not exceed the capacity values
indicated on the platform rating placard.
The overload sensing system is not active when the ma-
chine is being driven with the main boom below horizon-
tal and fully retracted. This allows the machine to be driven
without the system sensing an overload due to rough
ground conditions.
To eliminate repeated tripping of the system during ma-
chine operation, there is a five second delay in machine
functions following:
• starting the engine.
• placing the drive/boom selector switch in the boom
position when the main boom is below horizontal and
fully retracted.
• removing excess load from the platform.
Driving and Steering
A Danger
The aerial platform can tip over if it becomes un-
stable. Death or serious injury can result from a tip-
over accident. Do not drive an elevated aerial plat-
form on soft, uneven, or sloping surfaces. Do not
drive four wheel drive machines on grades that ex-
ceed 30 percent or two wheel drive machines on
grades that exceed 25 percent.
For operation of four wheel drive machines on grades up
to 30 percent, or two wheel drive machines on grades up
to 25 percent, it is recommended that the main boom be
near horizontal and the jib on TB85J machines elevated
just enough to provide adequate ground clearance.
A 30 percent grade is a 0.91 m (36 ″) vertical rise in 3.05
m (10 ′) horizontal length.
A 25 percent grade is a 0.76 m (30 ″) vertical rise in 3.05
m (10 ′) horizontal length.
Avoid driving with the platform over the front (steer) end of
the chassis. In this position the machine is difficult to
control because:
• drive and steer control movements and their result-
ing 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 plat-
form from colliding with obstacles several feet be-
yond the path of the tires.
A
Warning
Death or serious injury can result from improperly
driving or steering the aerial platform. Read and
understand the information in this manual and on
the placards and decals on the machine before op-
erating 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.
Lanyard
Anchors
Platform Foot
Switch