jakob HIT-TRAC 16B 사용자 설명서 - 페이지 16
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페이지 인쇄4.2
Working
4.2.1 Pulling and lifting
1. Start the motor (20)
2. Check that the chain brake (21) is disengaged. (see arrow) To protect the
coupling, the chain brake should not be engaged for too long.
3. Set the driving wheel into motion using the throttle lever. Open the thrttle
enough that the motor runs smoothly and the centrifugal clutch grips
properly.
4. Release throttle lever. The driving wheel will immediately stop moving and
the built-in backstop will stop the driving wheel from turning backwards.
4.2.2 Restart under load
1. Release chain brake
2. Quickly pull the throttle lever so that the motor can reach the required speed and the centrifugal clutch can
instantly deliver the required torque.
4.2.3 Lowering
To lower the load or relieve tension in the rope, release the brake:
1. Power off motor.
2. Swing hand crank out at a right angle
3. Turn handwheel in anticlockwise direction.
Turning the handle in this way reduces the preload force on the brake plates until the brake housing starts to move. The rope
speed is dependent on the speed of the hand crank.
Do not release the hand crank during movement and do not pivot during movement.
To pause the lowering, stop the handwheel. This raises the contact pressure on the brake plates until the brake housing and,
consequentially, the load come to a stop. As soon as the brake housing stops, turn the hand crank 1/4 of a revolution back-
wards and pivot it back in.
Turn the hand crank a 1/2 revolution backwards in a clockwise direction after the rope has been released so that the spindle
can be released from the nut and doesn't seize up when it cools down.
As energy produced during lowering is converted into frictional heat, the distance the load can be lowered by is restricted to
protect the lowering brake (22) against overheating. The table provides the maximum values:
Lowering force
Lowering distance
16 kN
30 m
10 kN
50 m
8 kN
60 m
5 kN
100 m
2 kN
250 m
If the load is to be lowered over longer distances, the brake should be allowed to cool (air) and then lowered the rest of the
distance.
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