TROUBLE IN HYDRAULIC PUMP fault 3

Trouble in Hydraulic Pump

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 Pump"

3) Fault :-  Pump 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. Oil level too low. 
=> Fill the oil up to safe level. 
4. Pump  rotor groove worn out.
=> Change the worn out parts. 
5. Radial or axial loading too high. 
=> Loading should be  restricted to prescribed limit to acceptable amount,  check alignment limit. 
6. Initial speed rises. 
=> Check max, pressure, if needed replace with larger capacity  and install pipes of  nominal bore. 
7. Inadequate cooling. 
=> Increase cooling capacity. 
8. Cooling system is dirty.  
=> Clean the cooling system. 

9. Differential pressure too low. => Increase pressure setting of relief valve. 
10. Pressure too high. 
=>  Reduce pressure setting. 
11. Wrong type of pressure valve. 
=> Replace by appropriate type of valve. 
12. Wrong seal size. 
=> Replace by suitable size of seals. 
13. Filter dirty or too small. 
=> Clean filter or replace by larger 
14. Pump running speed high. 
=>  Reduce speed. 
15. Cavitation. 
=>  Bleed the system. 
16. Foams in oil. 
=>  Vent the system. 
17. Venting dirty. 
=> Clean the vents. 
18. System contaminated. 
=> Flush the system. 
19. Sharp bends in suction line. 
=> Eliminate bends or at least reduce them.
20. Boost pump failed. 
=> Check bolt pump and repair as 
     required.