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Crane Inspection The two general classifications are "frequent" and "periodic." ➢ Frequent inspection: Daily to monthly intervals. ➢ Periodic inspection: 1- to 12 -month intervals, or as specifically recommended by the manufacturer. The operator should check the following items daily: ❑ All control mechanisms for maladjustment interfering with proper operation ❑ Deterioration or leakage in air or hydraulic systems ❑ All safety devices for malfunction The following items should be checked weekly or monthly, depending on how much the crane is used: ❑ All control mechanisms for excessive wear of components and contamination by lubricants or other foreign matter. ❑ Crane hooks, for deformations or cracks. For hooks with cracks or having more than 15 percent in excess of normal throat opening or more than 10° 551twist from the plane of the unbent hook. ❑ Rope reeving for noncompliance with manufacturer's recommendations. ❑ Electrical apparatus for malfunctioning, signs of excessive deterioration, dirt, and moisture accumulation. Complete inspections of the crane must be performed at periodic intervals depending upon its activity, severity of service, and environment or as specifically indicated below. These inspections have to include all "frequent" inspection items and in addition, items such as the following: ❑ Deformed, cracked, or corroded members in the crane structure and boom ❑ Loose bolts or rivets ❑ Cracked or worn sheaves and drums ❑ Worn, cracked, or distorted parts such as pins, bearings, shafts, gears, rollers and locking devices ❑ Excessive wear on brake and clutch system parts, linings, pawls, and ratchets ❑ Load, boom angle, and other indicators over their full range, for any significant inaccuracies ❑ Gasoline, diesel, electric, or other power plants for improper performance or noncompliance with safety requirements ❑ Excessive wear of chain -drive sprockets and excessive chain stretch ❑ Travel steering, braking, and locking devices, for malfunction ❑ Excessively worn or damaged tires ❑ All wire ropes (see below) A carbon dioxide, dry chemical or equivalent fire extinguisher has to be kept in the cab or vicinity of the crane. Since it stays with the crane, it too should be periodically checked to be sure that it is fully charged and functional. A crane that has been idle for a period of one to six months has to go through the frequent inspection checklist of daily/weekly/monthly items before placing in service. A crane that has been idle for six months or more has to be given a complete inspection comprised of frequent as well as periodic inspection items before being placed in service. 25