Snorkel TB47J CE User Manual download pdf (Page 45)

Chapter 8 – Operation

TB47J – 0075239EE 41

Boom Operation

Use the following procedure to operate the turntable,

boom, or platform functions.

1. Turn the boom speed knob to slow.

2. Step down on the platform foot switch. This switch

must be held down to operate the upper controls.

Figure 8.4 – Platform

3. Hold the appropriate control in the desired direction.

Always look in the direction of movement.

4. Gradually turn the boom speed knob to control the

boom extend, jib, and platform rotate function speed.

5. 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 8.3)

will illuminate when the platform rated work load is ex-

ceeded.

Lanyard

Anchors

Platform Foot Switch

Figure 8.3 – Upper Controls

Top

Front

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 operational.

ADanger

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.

Start Switch

Emergency Stop

Platform

Overload Light

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Snorkel TB47J CE User Manual Page 45

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