Snorkel TB47J CE User Manual download pdf (Page 60)

Chapter 11 – Troubleshooting

56 TB47J – 0075239EE

Symptom

Lower controls do not work.

Upper controls do not work.

Boom functions do not work.

Boom and drive functions seem

sluggish.

Boom jerks while it is extended.

Tip boom extend/retract, jib, and

platform rotate functions do not

work from the upper controls.

Booms drift down.

Possible Cause

Control selector switch is in the plat-

form position.

Ground operation switch not held in

the on position.

Platform overload sensor is tripped.

Battery disconnect switch turned off.

Emergency stop switch at lower and

upper controls is in the off position.

Control selector switch at lower con-

trols is in the lower control position.

Platform foot switch not engaged.

Platform overload sensor is tripped.

The drive/boom switch is in the drive

position.

Hydraulic oil is cold and thick.

Wire ropes are loose.

Boom speed knob set too slow.

The emergency lowering valve is open.

Hydraulic system malfunction.

Corrective Action

Place the switch in the lower control

position.

Hold the ground operation switch in

the on position while operating the

control toggle switches.

If horn is sounding and red overload

light is on or blinking, remove weight

from the platform until the load is at

or below rated capacity.

Place switch in the on position.

Place the emergency stop in the on

position.

Place switch in the upper control po-

sition.

Step down on platform foot switch

while operating controls.

If horn is sounding and red overload

light is on or blinking, remove weight

from the platform until the load is at

or below rated capacity.

Place the switch in the boom posi-

tion.

Use cold weather hydraulic oil as rec-

ommended for weather conditions.

Warm oil before operating the ma-

chine.

Refer the problem to a qualified ser-

vice technician.

Turn knob toward fast.

Turn the emergency lowering knob to

close the valve.

Stow the machine and do not oper-

ate until repairs are made.

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