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g. Idle sheave engagement with load chain; load chain twisting.
h. Proper limit switch actuation and motor stopping when the hook rises at upper limit under no load.
i. No deformed, peeled and cracked cushion rubber.
j. 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
5-3. Periodic Inspection (see table)
Complete inspections of the hoist shall be performed at intervals as defined in Sec. 5-1 (b) (2). These
inspections may be performed with the hoist in its normal location and do not require that the entire hoist
be dismantled. Covers and other items normally supplied to allow inspection of components should be
opened or removed for, these inspections. Any deficiencies such as those listed below shall be examined by
a designated person to determine whether they constitute a hazard, or whether complete disassembly is
necessary. These inspections shall include the requirements of Sec.5-2.
a. Inspection to all items included in FREQUENT inspection.
b. Fastening of screws, bolts, and nuts.
c. Wear, corrosion, cracks, distortion, etc., of the gear, bearings and chain pins.
d. Damage to the hook or fittings that attach the hook to the chain.
e. Damage to or excessive wear of the load sheave chain pocket:
If the chain pocket is too wide or deep, the chain may be lifted up over the pocket or may get caught
between the chain guide and load sheave.
Also check the chain guide for wear around the opening through which the chain enters the hoist.
* Extremely worn or damaged parts should be changed.
f. For the friction clutch, see Sec. 6-3.
g. Pitching of contactor contact point deterioration:
Operate the push buttons and check if it sticks at any point.
h. Imperfect insulation of cables, cords, and the control station.
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