Trouble in Hydraulic Motor
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Now we study about "Hydraulic Motor"1) Fault :- Motor makes loud noise.
Probable causes and Remidial action.
1. Vane spring broken.
>>> Change the spring.
2. Shaft seal leaks.
>>> Replace the seal.
3. Casing leaks.
>>> First tighten bolts, then check for cracks and sealing.
4. Oil temperature too high.
>>> Check cooling circuits.
5. Motor parts defective.
>>> Replace defective parts.
Tighten bolts uniformly.
6. Aeration.
>>> i) Fill the reservoir with the oil up-to required level to prevent aeration.
ii) Check all connections on inlet side of motor and pour hydraulic oil over suspected leak. If noise stops, leakage has been found,. Fill hydraulic tank to the full mark.
iii) Check condition of motor shaft seal. Change, if required.
7. Intake line or suction filter partly clogged.
>>> Clean or replace the filter or
line.
8. Motor running too fast.
>>> Reduce speed up to prescribed limit.
9. Coupling misaligned (Due to this, bearing may get damaged, there will be a play at shaft, abnormal sound will be observed).
>>> Realign the motor shaft.
10. Air leaks at motor intake pipe joints and air drawn through inlet line.
>>> Take action as explained in s.no.1, item no. 4.
11. Oil viscosity too high. (In cold climate, oil viscosity becomes high so no free flow will take place and cavitation will occur).
>>> Start the engine for few minutes to warm-up the hydraulic oil used in machine for proper flow. Use only proper grade of oil.
12. Cavitation.
>>> i) Check condition of suction filter and return line filters. Clean or change as necessary.
ii) Check clogging of inlet line. Clean or change as necessary.
iii) Check loose fittings on suction lines. Tighten, if required.
iv) Clean hydraulic tank breather.
13. Foams in oil.
>>> Vent the system.
14. Casing leaks.
>>> First tighten bolts, then check for cracks and sealing.
15. Motor stressed.
>>> Check mounting alignment. Tighten bolts uniformly.
16. Foreign bodies in suction line.
>>> Remove foreign bodies, if need flush the system.
17. System dirty.
>>> Flush the system.
18. Sharp bends in suction line.
>>> Eliminate or reduce the bends in suction line.
19. Motor worn or damaged.
>>> Motor should be overhauled or replaced.
Now we study about "Hydraulic Motor"
1) Fault :- Motor makes loud noise.
Probable causes and Remidial action.
1. Vane spring broken.
>>> Change the spring.
2. Shaft seal leaks.
>>> Replace the seal.
3. Casing leaks.
>>> First tighten bolts, then check for cracks and sealing.
4. Oil temperature too high.
>>> Check cooling circuits.
5. Motor parts defective.
>>> Replace defective parts.
Tighten bolts uniformly.
6. Aeration.
>>> i) Fill the reservoir with the oil up-to required level to prevent aeration.
ii) Check all connections on inlet side of motor and pour hydraulic oil over suspected leak. If noise stops, leakage has been found,. Fill hydraulic tank to the full mark.
iii) Check condition of motor shaft seal. Change, if required.
7. Intake line or suction filter partly clogged.
>>> Clean or replace the filter or
line.
8. Motor running too fast.
>>> Reduce speed up to prescribed limit.
9. Coupling misaligned (Due to this, bearing may get damaged, there will be a play at shaft, abnormal sound will be observed).
>>> Realign the motor shaft.
10. Air leaks at motor intake pipe joints and air drawn through inlet line.
>>> Take action as explained in s.no.1, item no. 4.
11. Oil viscosity too high. (In cold climate, oil viscosity becomes high so no free flow will take place and cavitation will occur).
>>> Start the engine for few minutes to warm-up the hydraulic oil used in machine for proper flow. Use only proper grade of oil.
12. Cavitation.
>>> i) Check condition of suction filter and return line filters. Clean or change as necessary.
ii) Check clogging of inlet line. Clean or change as necessary.
iii) Check loose fittings on suction lines. Tighten, if required.
iv) Clean hydraulic tank breather.
13. Foams in oil.
>>> Vent the system.
14. Casing leaks.
>>> First tighten bolts, then check for cracks and sealing.
15. Motor stressed.
>>> Check mounting alignment. Tighten bolts uniformly.
16. Foreign bodies in suction line.
>>> Remove foreign bodies, if need flush the system.
17. System dirty.
>>> Flush the system.
18. Sharp bends in suction line.
>>> Eliminate or reduce the bends in suction line.
19. Motor worn or damaged.
>>> Motor should be overhauled or replaced.
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