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Maintenance
HC-7X NEXSTAR
D.
Use care when inspecting sections of rapid deterioration around flange points, crossover points, and
repetitive pickup points on drums.
E. Inspect number, distribution, and type of visible broken wires.
Continued use of rope depends upon good judgment by a designated person in
evaluating remaining strength in a used rope after allowance for deterioration
disclosed by inspection. Continued rope operation depends upon this remaining
strength.
Periodic Inspection
Any deficiencies, such as those listed below, shall be carefully examined and determination made as to
whether they constitute a hazard:
1. Inspect for deformed, cracked or corroded members in the crane structure and entire boom.
2. Inspect for loose bolts, particularly mounting bolts.
3. Inspect for cracked or worn sheaves and drums.
4. Inspect for worn, cracked, or distorted parts such as pins, bearings, shafts, gears, rollers and devices.
5. Inspect for excessive wear on brakes and clutch system parts and linings.
6. Inspect crane hooks for cracks.
7. Inspect travel steering, braking, and locking devices for malfunction.
8. Inspect for excessively worn or damaged tires.
9.
Inspect hydraulic hose, fittings, and tubing for the following problems:
A.
Evidence of leakage at the surface of the flexible hose or its junctions with the metal and coupling.
B. Blistering, or abnormal deformation to the outer covering of the hydraulic or pneumatic hose.
C. Leakage at threaded or clamped joints that cannot be eliminated by normal tightening or
recommended procedures.
D.
Evidence of excessive abrasion or scrubbing on the outer surface of a hose, rigid tube, or fitting.
Means shall be taken to eliminate the interference of elements in contact or otherwise protect the
components.
10. Inspect hydraulic pumps and motors for the following problems:
A. Loose bolts and fasteners.
B. Leaks at joints between sections.
C. Shaft seal leaks.
D. Unusual noises or vibrations.
E. Loss of operating speed.
F.
Excessive heating of fluid.
G. Loss of pressure.
11. Inspect hydraulic valves for the following:
A. Cracks in valve housing.
B. Improper return of spool to neutral position.
C. Leaks at spools or joints.
D. Sticking spools.
E. Failure of relief valves to attain or maintain correct pressure setting.
F.
Relief valve pressure shall be checked as specified by the manufacturer.
12. Inspect hydraulic cylinders for the following problems:
A.
Driving caused by fluid leaking across piston.
B. Rod seals leaking.
C. Leaks at welding joints.
D. Scored, nicked, or dented cylinder rods.
E. Damaged case (barrel).
NOTICE