Prowinch PWH - Page 50

46
Troubleshoooting
| 46 | Version 1.0
Condition
Reason Action Cause Correction
Chain twist
Bottom hook upturned Reset hook
Bottom hook rotation
during usage
Check hook state before
operation
Chain twist in machinery
body
Reassemble chain guide
and load chain
Improper assembly Ensure proper assembly
Limit switch
suddenly acti-
vated
in decline
Chain twist or knot in
chain bag
Conrm chain bag capac-
ity (chain bag nameplate)
replace with larger one if
capacity insucient
Chain bag inadequate
capacity
Conrm lifting height and
chain bag capacity
Crackling sound Chain damage
Measure wear of chain
link diameter. Replace if
reaching wear limit
Long-term operation
with insucient
lubrication
Apply grease lubricant
regularly
Irregular sound
from springs
(cracking
sound)
Wear of link part
Measure diameter on
wear of chain, and replace
when at wear limit
Excessive operation Avoid excessive operation
Overload Use under rated load
Incline pull Ensure proper pull direction
Wear of load pulley and
empty pulley
Refer to load pulley and
empty pulley
Extension of pitch
Measure pitch and replace
when exceeding limit
Overload Use under rated load
Irregular
sound
Damage or deformation
on chain surface
Replace when obvious
damage and deformation
occur
Use under transition
situation
Use under models with
multiple chain
Chain used improperly Ensure proper assembly
Mark on chain surface
Damaged by other
equipment
Monitor surrounding envi-
ronment throughout usage
to avoid collisions
Discoloration Rust, corrosion
Apply lubricants and
replace when obvious rust
and corrosion occurs
Lubricant exhausted
Apply lubricating oil regu-
larly
Exposure to water Use in dry places
Inuenced by seawater
or chemical agent
Inform us if used in special
circumstances to safeguard
range
Load chain
fractured
Reaching service life
Check chain, replace if
diering from benchmark
specications
Mechanical life
Operate correctly and
manage properly including
inspection before usage and
regular check-ups
Load Chain