Harrington-hoists-and-cranes Static/Dynamic Hoist Load Tester Manuel d'utilisateur télécharger pdf (Page 17)

3. SYSTEM OPERATES SLOWLY

• Oil viscosity too high, cold oil Allow oil to warm up before operating

machine.

• Low oil level Check reservoir and add oil as necessary.

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

• Badly worn pump, valves, cylinders, etc. Repair or replace as needed.

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

• Improper adjustments Check orifices, relief valves, etc. Adjust

per manual.

• Oil leaks Tighten fittings. Replace seals or damaged

lines.

4. SYSTEM OPERATES TOO FAST

• Wrong size or incorrectly adjusted Replace or adjust as necessary.

restrictor

5. OVERHEATING OF OIL IN SYSTEM

• Oil passing through relief valve for Return control valve to neutral when not

excessive time in use.

• Incorrect oil, low oil, or dirty oil Use recommended oil. Fill reservoir, clean

oil, replace filter element.

• Excessive component internal leakage Repair or replace component as necessary.

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

• Insufficient heat radiation Clean dirt and mud from reservoir and

components.

• Malfunctioning component Repair or replace.

6. FOAMING OF OIL

• Incorrect, low or dirty oil Replace, clean or add oil as needed.

• Air leaks Check suction line and component seals for

suction leaks. Replace.

7. NOISY PUMP

• Low oil level, incorrect oil, foamy oil Replace, clean or add oil as needed.

• Suction line plugged, inlet screen Clean or replace.

plugged

• Worn or damaged pump Repair or replace

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Harrington-hoists-and-cranes Static/Dynamic Hoist Load Tester Manuel d'utilisateur Page 17