Harrington Hoists and Cranes Static/Dynamic Hoist Load Tester - Manual (Page 18)

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8. LEAKY PUMP OR MOTOR
• Damaged or worn shaft seal Check for misalignment.
• Loose or broken parts Tighten or replace.
9. CONTROL VALVE STICKY (BINDING)
• Valve linkage misaligned Repair.
• Tie-bolts too tight (stack valves) Loosen as necessary.
• Valve damaged Replace.
10. CONTROL VALVE LEAKS
• Tie-bolts too loose (stack valves) Tighten as necessary.
• Seals damaged or worn Replace.
11. CYLINDER LEAKS
• Seals worn or damaged Replace.
• Rod damaged Replace.