10
I
CHAIN BLOCK
SAFETY OPERATIONS & PARTS MANUAL
CH A IN BL O CK
To determine if load chain should be continued in service, check gauge
lengths as indicated below. Chain worn beyond length indicated,
nicked, gouged or twisted should be replaced before returning chain
block to service. Chain should be clean, free of twists and pulled taut
before measuring. In cases where the wear is localised and not beyond
serviceable limits, it is sometimes possible to reverse the load chain, end
for end and allow a new section to take the wear. Proper installation of
the load chain is covered in the section on Reeving Load Chain (page 12).
Note that worn chain can be an indication of worn chain block components.
For this reason, the chain block’s chain guide roller and lift wheel should
be examined for wear and replaced as necessary when replacing worn
chain.
Also load chains are specially heat treated and hardened and should never
try to be repaired.
WARNING
Using chain other than Beaver’s supplied load chain may cause the chain to
jam in the chain block and/or allow the chain to break and the load to drop.
TO AVOID INJURY
Due to the size requirements and physical properties, use only Beaver
Alloy Load Chain in the 3S Chain Block.
Important. Do not use replaced chain for other purposes such as
lifting or pulling. Load chain may break suddenly without visual
deformation. For this reason, cut replace chain into short lengths to
prevent use after disposal.
Before returning chain to service or after replacing a load chain, lubricate
liberally with chain oil or equal lubricant. Remove excess lubricant from
the chain by wiping with a cloth.
HAND CHAIN
Hand Chain should be cleaned, inspected and gauged in the same manner
as load chain.
As received from the factory, the hand chain may contain an unwelded
link. This link can be placed in a vice and twisted open to facilitate
changing chain length.
Please note that opening and closing of the connecting link more than
twice is not recommended. Also, connecting links must not be made by
cutting the weld side of a standard hand chain link.
Hand chain should be assembled to hand wheel free from twists with
weld on vertical link facing inwards towards hand wheel and weld on
horizontal link facing towards the hand wheel side plate.
Care must be taken to assure that there is no twist in the hand chain loop.
MAINTENANCE
