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TABLE INSPECTION FOR ELECTRC CHAIN HOISTS
Item
Normal Service
Heavy Service Strict Service
Visual
Monthly
Record
Yearly
Visual
Weekly
Record
Semiannually
Visual
Daily
Record
Quarterly
FREQUENT inspection (see 5-2)
All functional operating mechanisms for
maladjustment and unusual sounds
*
－
*
－
*
－
Brake slippage (see 5-2.a.) *
－
*
－
*
－
Optimal control functions (see 5-2.b.) *
－
*
－
*
－
Hook damage, crack, bend and opening (see 5.2.c.) *
－
*
－
*
－
Hook latch operation (see 5-2.d.) *
－
*
－
*
－
Optimal load chain lubrication (see 5.2.e.) *
－
*
－
*
－
Load chain in accordance with 5-2.e. *
－
*
－
*
－
Load chain reeving for compliance with hoist
manufacturer
’s recommendations
*
－
*
－
*
－
Load sheave engagement with load chain: load chain
twisting.
*
－
*
－
*
－
Idle sheave engagement with load chain: load chain twisting.
*
－
*
－
*
－
Proper limit switch actuation and motor stopping when the
hook rises at upper limit under no load.
*
－
*
－
*
－
No deformed, peeled and cracked cushion rubber.
*
－
*
－
*
－
No damaged chain spring (option), and minimum free length
75mm (130mm), of the chain spring.
Note: Initial free length of the spring 85mm (150mm).
* ( ): 60-240kg
*
－
*
－
*
－
PERIODIC inspection (see 5-3)
Requirements of frequent inspection
－
*
－
*
－
*
Evidence of loose bolts, nuts or rivets (see 5-3.b.)
－
*
－
*
－
*
Evidence of worn, corroded, cracked, or distorted
parts such as load blocks, suspension housing, chain,
attachments, clevises, yokes, suspension bolts, shafts,
gears, bearings and pins. (see 5-3.c.)
－
*
－
*
－
*
Imperfect insulation of cables, cord and control station
(see 5.3.h.)
－
*
－
*
－
*
Evidence of damage or excessive wear of sheave
(see 5-3.e.)
－
*
－
*
－
*
Evidence of excessive wear on friction clutch
(see 5-3.f. 6-3)
－
*
－
*
－
*
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