Chapter 9 Emergency Operation

3–2–1 Forward and backward

CAUTION

• Use the arrow decal to determine which way is forward and which way is backward. • A warning buzzer will beep regularly when the travel control lever is being operated.

Depress the foot switch and operate the travel control lever to the traveling direction.

3–2–2 Steering

In order to change course, step on the foot switch while using the steering switch.

3–2–3 High-speed traveling DANGER

• Steer straight while traveling at high speeds. • Switch to either medium or low speed before turning. • The platform will swing widely, and there is a possibility the operator will be thrown from the platform.

CAUTION

• Do high-speed traveling only when the traveling surface is flat, you have a good forward view, and you have to travel for a long distance. • Under normal circumstances, keep the travel speed select switch on “LOW

SPEED.” • Engine rotations become high automatically when high-speed traveling. Avoid changing your traveling speed because doing so creates a big shock. • High-speed traveling is only possible when the boom is fully retracted, the boom angle is under the horizontal, and the rotation angle is under 10° . In all other situations, even if you turn the travel speed select on “HIGH SPEED,” you will be able to travel only at low speeds. Chapter 8 - Operation

3–3 Boom operation DANGER

Do not push the boom or platform to the ground, or use them to crash into objects, or push things up.

WARNING

Before rotating the boom, make sure it will not catch people or things, and make sure there are no obstacles in the way. The turntable protrudes 850 mm (2 ft – 9 in) beyond the width of the chassis when rotating the boom, so watch the turntable movement and make sure that no person or obstacle is around the turntable. If the boom cannot be raised and the rear of the turntable cannot be seen, have a guide assist you.

CAUTION

• Before rotating the boom, make sure the rotation lock pin has been removed. • If the boom is rotated while the machine leans, the rotation may be rough. • Pay attention to how the turntable moves when rotating it. • If you cannot raise the boom, or are not able to see the rear of the turntable, perform the rotation under the supervision of a guide person.

3–4 Platform rotating operation

CAUTION

• Keep the platform straight while traveling. • When rotating the platform neck, make sure to stop the machine, and check the safety of the surrounding area.

Depress the foot switch and operate the platform rotation switch to rotate the platform.

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Chapter 8 - Operation

3–5 Emergency stop (stop the engine)

CAUTION

• If the boom is to be kept in the same place for a while, to prevent misoperation, position the platform, then push the emergency stop button before doing your work. • If the boom descends gradually on its own even though the emergency stop button has been pushed, the cylinder may be descending on its own. Start the engine or the emergency pump, and move the lever in the opposite direction of the boom movement in order to counteract it. Quickly and fully retract the boom and stop working. • If an operation must be stopped because of a malfunction, stop working and have the machine checked immediately.

Emergency stop button

3–6 Emergency pump operation

NOTICE

• The emergency pump can only be used for only 30 seconds or less at a time, with a rest period over 30 seconds between uses. • Do not use the emergency pump for normal work because it puts a great load on the pump, and do not use a pump work cycle other than that described below. You can damage the emergency pump, and may burn out the motor.

Emergency pump switch

fig. 8-12

06-08

(1) Press down the emergency stop button. (2) When the emergency stop button has been pressed down, the engine will stop, and all operations will be impossible, except starting the engine and operating the emergency pump. (3) To cancel the stop, pull up the emergency stop button, and start the engine using the engine start switch. (4) In case of the following, press down the emergency stop button. – In case you need to stop the engine while you are doing work. – In case you will not be using the levers on the upper panel, to prevent misoperation, push the emergency stop button in advance. – When person in the platform stops all of the machine movements to avoid hazard. – In case it is not possible to control the operation using the levers.

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fig. 8-13

06-14

(1) Press the emergency pump switch. (2) The pump will turn on when both the emergency pump switch and the operation switch are turned on. (3) If work is being done on a high place, and it happens that the machine is inoperable because of engine or pump trouble, use the emergency pump to lower the person to the ground. (4) The emergency pump runs off the battery. (5) The emergency pump work cycle