WHY MOTOR LOST IT'S SPEED [Fault 3]

Trouble in Hydraulic Motor

You are on n4net and this is indian railway track machine trouble shooting technology with you.

This is a series of trouble shooting technique  for the track machine working in Indian Railway.  When you study  this you able to rectify a fault of machine. If this is helpful for you than share with others. It may helps them. Thanks for sharing.

Now we study about "Hydraulic Motor"

3) Fault :-  Speed loss on motor. 

Probable causes and Remidial action.

1.  Inlet pressure too low. 
>>> Increase pressure by resetting relief valve.
2.  Motor parts defective. 
>>>   Change defective parts. 
3.   Oil temperature too high 
 >>>   Check cooling circuit Hydraulic oil cooler may be defective . 
4. Out let pressure too high      
 >>>  Check the system pressure. 
5.  Port plate does not  make contacts.                                  
>>>   Dismantle the motor and repair as per requirement. 

Why Motor overheats [Fault 2]

Trouble in Hydraulic Motor

You are on n4net and this is indian railway track machine trouble shooting technology with you.

This is a series of trouble shooting technique  for the track machine working in Indian Railway.  When you study  this you able to rectify a fault of machine. If this is helpful for you than share with others. It may helps them. Thanks for sharing.

Now we study about "Hydraulic Motor"

2) Fault :-  Motor overheats

Probable causes and Remidial action.

1. Wrong oil grade.
>>>  Fill oil as recommended. 
2. Oil speed in system too high.
>>>  Install pipes of proper size. 
3. Motor rotor groove worn out.
>>> Change motor parts. 
4. Radial or axial loading too high.
>>> Limit to acceptable amount, check alignment limit.  
5.  Initial speed rises
>>> Check max, pressure, if  needed replace with larger  capacity  and install pipes of  nominal bore. 
6.  Inadequate cooling.
>>>  Increase cooling capacity
7. Cooling system is dirty. 
 >>> Clean the cooling system
8. Differential pressure too low.
>>> Increase pressure setting of relief valve. 
9. Pressure too high.
>>> Reduce pressure setting. 
10. Wrong type of pressure valve.
>>>Replace by appropriate type of valve. 
11. Wrong seal size.
>>> Replace by suitable seals. 
12. Motor running speed high.
>>>Reduce speed. 
13.Cavitation.
>>> Bleed the system
14.Oil foams.
>>> Vent the system. 
15.Venting dirty.
>>> Clean the  vents. 
16.System contaminated.
>>> Flush the system. 
17.Sharp bends in suction line.
>>> Eliminate bends or at least reduce them. 
18.Motor is of under capacity.
>>> Install motor of proper capacity.

WHY MOTOR MAKES NOISE [Fault 1]

Trouble in Hydraulic Motor

You are on n4net and this is indian railway track machine trouble shooting technology with you.

This is a series of trouble shooting technique  for the track machine working in Indian Railway.  When you study  this you able to rectify a fault of machine. If this is helpful for you than share with others. It may helps them. Thanks for sharing.

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.