Lower Control Operation - Versalift VO-452-MHI Operator's Manual

Aerial device

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while an operator is working aloft.

Note: The operation of an outrigger interlocking device

(s) does not assure aerial device stability. It serves

only to remind the operator that the outriggers have

not been deployed.

The controls for operating the outrigger/boom interlock

include a detented control selector and a control valve.

These controls are usually mounted in the ground

control panel similar to the arrangement shown in

Figure 4.2. ANSI A92.2 standards require that the

outrigger control valve be located where the operator

can watch each outrigger raise and lower as the control

valve lever is activated.

Lowering the Outriggers With an Outrigger/Boom

Interlock System: To lower the outriggers select

"ground controls" with the control selector. Then

operate the outriggers as described previously. Select

"lift controls" with the control selector in order to begin

operating the booms.

Retracting the Outriggers With an Outrigger/Boom

Interlock System: The booms must be stowed before

the interlock system will allow the outriggers to be

retracted. Stow the booms as described in this

section, "Storing the Aerial Lift". Select "ground

controls" with the detented control selector. Then raise

the outriggers as described previously.

Ground Control Panel With an Outrigger/Boom

Interlock System

HYDRAULIC TOOL OPERATION AT THE GROUND

(Optional) - The aerial lift can be equipped with open-

center or closed-center hydraulic tools that operate

VERSALIFT VO-452/455/460-MHI

Figure 4.2

at 3000 PSI (211 kg/cm

the ground controls. A pressure and flow limit valve

is optional. Select outrigger operation at the ground

controls. Then connect the hydraulic tool hoses to

the tool power outlets (quick-disconnect couplings)

and activate the tool power valve by pulling the tool

power valve knob "out". The other aerial lift controls

will not respond while the hydraulic tools are being

operated. To disconnect the hydraulic tools, the tool

power valve must be turned "off" so that the pressure

in the system is relieved. This is done by pushing the

tool power valve knob "in". Then the tool hoses can

be disconnected safely and easily from the tool power

outlets (quick-disconnect couplings). The tool power

controls are shown in Figure 4.3.

WARNING:

PRESSURE TO THE TOOL PORTS BEFORE

CONNECTING OR DISCONNECTING THE

HYDRAULIC TOOL HOSES MAY RESULT IN A

HIGH PRESSURE HYDRAULIC OIL SPRAY. THIS

SPRAY OR MIST CAN PUNCTURE OR BECOME

EMBEDDED

BENEATH

CONTAMINATE THE EYES. THESE CONDITIONS

REQUIRE IMMEDIATE MEDICAL ATTENTION.

Tool Power Controls

Figure 4.3