Harrington-hoists-and-cranes Static/Dynamic Hoist Load Tester Instrukcja Użytkownika Pobierz pdf (Strona 16)

3.3 Trouble Shooting Tips

FINDING AND SOLVING PROBLEMS:

Most hydraulic system failures follow the same pattern, a gradual or sudden loss of

pressure or flow with a resulting loss of cylinder or motor power. Any one of the

system’s components may be at fault. By following step-by-step procedures, the trouble

can be located in a short time.

1. SYSTEM INOPERATIVE

• No oil in system, insufficient oil in Fill system. Check for leaks.

system

• Wrong oil in system Refer to specifications. Change oil.

• Filter is dirty or clogged Drain oil and replace filter or filter

element.

• Oil line restriction Oil lines are dirty or collapsed. Clean

or replace.

• Air leaks in pump suction line Repair or replace as necessary.

• Worn or dirty pump Clean, repair or replace. Check

alignment. Check for contaminated oil.

Drain and flush system.

• Badly worn components (valves, Examine and test for internal or external

cylinders, etc.) leakage. Replace faulty components.

Check for cause of wear.

• Leakage Check all components, particularly the

relief valve for proper settings. Refer to

technical manuals.

• Excessive load Check unit specifications for load limits.

• Slipping or broken pump drive Repair or replace belts, couplings, etc.

Check for proper alignment or tension.

2. SYSTEM OPERATES ERRATICALLY

• Air in system Check suction side of system for leaks.

Repair.

• Cold oil Allow ample warm-up period.

• Dirty or damaged components Clean or repair as necessary.

• Restriction in filters or lines Clean and/or replace elements or lines.

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