4-3. Tool/device replacement
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Method 1 - With drum lock
1) Lock the drum according to Chapter 4-2 "Drum lock operation" Remove the suspended
tool/device.
WARNING
Move the tool/device upward and downward to check the drum is locked securely.
Never remove the tool/device before checking this.
If the drum is not locked securely, the drum lock could be released allowing the wire rope to snap
back, possibly causing personal injury.
Drum lock check is very important factor for safety. Never fail to verify the sufficient drum lock.
2) Before attaching, check the mass (weight) of the new complete tool/device, including all
accessories, is within the capacity range of the balancer.
3) While watching the gauge, pre-adjust the spring tension to the mass of the new complete
tool/device by turning the worm with a wrench etc.
Turn clockwise for increasing the spring tension, turn counterclockwise for reducing.
The gauge shows the approximate spring tension (see Fig.2).
4) Attach the new complete tool/device to the bottom hook. Releasing the drum lock
WARNING
Never release the drum lock when the balancer is unloaded.
If released, the wire rope will snap back, possibly causing personal injury.
Always hold the suspended new tool/device by hand when releasing the drum lock, if the new
tool/device has a different mass (weight) to the old one.
Otherwise, the tool/device could rise up or drop down suddenly, possibly causing personal injury.
5) After attaching the new complete tool/device and releasing the drum lock, adjust the spring
tension again and check the tool/device is balanced.
NOTE: Over-tensioning could cause damage to the balancer body or the wire rope.
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Method 2 - Without drum lock
WARNING
Never remove the suspended tool/device while the wire rope is extended.
If removed, the wire rope will snap back and could cause personal injury.
1) Lift then remove the suspended tool/device when the wire rope is fully retracted.
2) Attach a new tool/device according to Chapter 3-2
"Tool/device attachment and spring tension adjustment".
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