13
8.
When personnel are suspended, a signalman must be
provided unless voice communication equipment is
utilized. Signals must be visible or audible to the operator
at all times.
9.
Personnel occupying the personnel platform shall wear a
body belt with lanyard appropriately attached to the load
block or to a structural member of the required strength
within the platform.
10. Bridles and associated hardware for the personnel platform
shall not be used for any other service.
11. Warning or limiting devices shall be installed to prevent
two blocking, unless audible communication has been
provided and one of the persons being lifted has been
specifically assigned the task of warning of the approach of
a two-block condition.
Emergency Lowering
For emergency lowering of personnel it is the customers
responsibility to provide an air system containing a small
reservoir near the winch that always remains charged.
Air from this reservoir can then be directed to the winch control
valve. Size reservoir in accordance with air consumption
required to operate winch. Reducing the air consumption will
proportionately reduce the line speed.
It may also be possible to lower the load by disconnecting the air
inlet hose and moving the throttle to the payout (down) position.
Contact the factory for minimum load requirements. Using this
method a lowering speed of approximately 3 ft/min (1 m/min)
can be accomplished.
Training
Program
The employer shall provide and implement a training program
for all supervisors and employees engaged in the operation of
raising, lowering or suspending personnel platforms from a
winch load line so that they are familiar with the requirements of
the hoisting system and are able to recognize the associated
hazards and take appropriate measures. Records of training
programs shall be maintained.
Planning Meeting
A meeting attended by the winch operator, signalman, persons to
be lifted and the person in charge of the task to be performed is
required to be held to plan and review the procedures to be
followed, including procedures for entering and leaving the
personnel platform, the points at which employees will enter and
leave the platform, the use of safety equipment, signals, and the
lift chart information.
NOTICE
• This meeting shall be held prior to the beginning of
personnel hoisting operations at each new work location and
thereafter for any new employees assigned to the operation.
General Winch Operation
Winch Controls
A spring loaded, motor mounted, manual throttle control valve
is supplied as a standard feature on these winches. Optional
remote pendant controls are also available. Reference the model
code on the winch nameplate and compare it to the
“SPECIFICATIONS” section of this manual to determine winch
configuration. The throttle control provides operator control of
the motor speed and direction of drum rotation.
Operate winch throttle control using smooth, even movements.
Do not slam or jerk throttle controls during operation.
Winch Mounted Air Throttle
Refer to Dwg. MHP0566.
The spring loaded, live air, manual control throttle valve mounts
to the air motor.
As viewed from the air motor end, move the control throttle
handle to the right (clockwise) to payout wire rope and to the
left (counterclockwise) to haul-in wire rope. Avoid sudden
movements of the control valve to ensure smooth operation of
the winch.
When winch is not in use, engage handle latch to prevent
inadvertent movement of the control throttle.
Winch Mounted Throttle Control Valve
(Dwg. MHP0566)
Remote Control Pendant
Optional feature. Refer to Dwg. MHP1311.
Provides for remote winch control at distances up to 60* feet (18
metres) away from the winch motor. Pilot air hoses connect the
pendant to the winch motor pilot air valve to provide winch
operation. The pendant control is a two lever movable control
station which controls payout and haul-in.
Direction of winch drum rotation is determined by the pendant
lever depressed. Air is directed from the pendant into the pilot
valve. The pilot valve spool shifts to direct control air into the
winch motor to operate the winch in the desired direction.
Winch operation must correspond to the directions indicated by
the arrows located on the pendant levers.
Depress pendant levers using smooth, even movements. To
operate the winch using the pendant:
1.
To operate in the haul-in direction, depress the ‘RIGHT’
lever.
2.
To operate in the payout direction, depress the ‘LEFT’
lever.
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