Problem
Chain is jammed
Block Seized
Slippage of load
Block not braking
Load chain catches or jams
Hand chain catches or jams
Hook latch does not work
TROUBLESHOOTING
Cause
Load is not being pulled in a
vertical direction.
Pull is at an angle greater
than 60°.
Load swivel has ceased
operating.
Block is dirty, or hampered
with foreign matter.
Fall of chain is tangled.
Block is overloaded.
Brake mechanism has
jammed.
Wear and tear.
Poor maintenance and
inspection.
Poor storage and handling.
Block is overloaded
Brake mechanism worn.
Block is overloaded
Brake mechanism worn
Damaged load chain, pinion
shaft, gears or sheaves.
Load chain not installed
properly (twisted,
kinked or "capsized").
Damaged hand chain, hand
chain wheel, pinion shaft,
gears, load chain, sheaves.
Hand chain not installed
properly (twisted or kinked).
Latch broken.
Load hook bent or twisted.
Solution
Line load to be positioned
vertically.
Reduce angle of pull.
a) Unload load and de-swivel.
b) Replace hook assembly.
Refer to maintenance and
repair section of this manual.
Unravel and straighten chain.
Check the load chain for
elongation and replace as
required.
Load block to recommended
capacity only.
Return to supplier or
authorised service centre for
repair.
Replace block.
Refer to manual for
maintenance and inspection
details.
Always store unit in a dry and
clean area.
Load block to rated capacity
only.
Inspect brake (Chapter
INSPECTION). Replace
brake discs or repair brake
as described in Chapter
MAINTENANCE.
Load block to rated capacity
only.
Return to supplier for repair
and testing
Disassemble hoist, inspect
and repair or replace
damaged components.
Remove load chain and re-
install.
Disassemble hoist, inspect
and repair or replace
damaged components.
Remove hand chain and re-
install.
Replace hook latch.
Inspect load hook as
described in Chapter
INSPECTION.
Replace if necessary.
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