| Inspect: | How often: | ||
| Structural members for: | • | Normal service - Monthly. | |
| • | Deformation. | • | Heavy service - Weekly to monthly. |
| • | Cracks. | • | Severe service - Daily to weekly. |
| • | Excessive wear on any part of the grapple. | • | Special or infrequent service - As recommended by a qualified person before and after each occurrence. |
| Pins and bushings. | |||
| Hydraulic lines. | |||
| Hydraulic cylinders. | • | Before using, when a grapple has been idle for more than one month. | |
| Loose bolts. | |||
| Electrical conductors that are visible without disassembly. | |||
| Note: | • Normal service means service that involves operation with various weights within the rated load limit, averaging less than sixty-five percent of rated load limits. |
| • Heavy service means service that involves operation within the rated load limit, that exceeds the limits of normal service. | |
| • Severe service means service that involves normal or heavy service with abnormal operating conditions. |
| Inspect: | How often: | ||
| Members, fasteners, and lifting parts for: | • | Normal service for equipment in place - Yearly. | |
| • • • |
Deformation. Wear. Corrosion. |
• | Heavy service, unless external conditions indicate that disassembly should be done to permit detailed inspection - Quarterly. |
| Hydraulic hose, fittings, and tubing for: | |||
| • | Evidence of leakage at the surface of the hose or its junction with metal couplings. | • | Severe service - Monthly. |
| • | Blistering or abnormal deformation of the outer covering of the hose. | • | Special or infrequent service - As recommended by a qualified person before the first occurrence and as directed by the qualified person for any subsequent occurrences. |
| • | Leakage at threaded or clamped joints that cannot be eliminated by normal tightening or recommended procedures. | ||
| • | Excessive abrasion or scrubbing on the outer surface of hoses, rigid tubes, or fittings. | ||
| Hydraulic motors for: | |||
| • | Loose bolts or fasteners. | ||
| • | Leaks at joints between sections. | ||
| • | Shaft seal leaks. | ||
| • | Unusual noises or vibration. | ||
| • | Loss of operating speed. | ||
| • | Excessive heating of the fluid. | ||
| • | Loss of pressure. | ||
| Hydraulic cylinders for: | |||
| • | Drifting caused by fluid leaking across the piston seals. | ||
| • | Rod seal leakage. | ||
| • | Leaks at welded joints. | ||
| • | Scored, nicked, or dented cylinder rods. | ||
| • | Dented case (barrel). | ||
| • | Loose or deformed rod eyes or connecting joints. | ||
| All electrical components, including meters, indicators and alarms for: | |||
| • | Proper operation. | ||
| • | Condition. | ||