TROUBLE IN HYDRAULIC PUMP fault 8

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"

8) Fault :-  Bearing failure. 

Probable causes and Remidial action.

1.  Chips  or other contaminants in bearing. 
=>  Replace bearings  and check intrusion of contaminants. 
2.  Coupling   misaligned. 
=> Align prime mover shaft and  pump. 
3.  Inadequate lubrication. 
=>  Lubricate system properly. 
4.  Pump running too fast. 
=>  Adjust speed of prime mover. 
5.  Excessive or shock loads. (Excessive loads due to operating pressure may damage the bearing). 
=>  Reduce operating pressure. 

TROUBLE IN HYDRAULIC PUMP fault 7

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"

7) Fault :-  Hydraulic oil overheated. 

Probable causes and Remidial action.

1.  System pressure is  too high. 
=> Adjust the pressure  to the required limit. 
2. Dirty oil 
=>  Clean or change filters and strainers. 
3.  Oil level is low. 
=> Fill up the oil to the upper mark. 
4. Hydraulic oil of incorrect viscosity. 
=>  Check oil for proper viscosity.  If, change of oil is required, flush the entire system and change filter before adding fresh oil. 
5. Faulty cooling system. 
=>   Check oil cooler for trash on out side cooling surfaces.  Clean with air pressure, or steam pressure. 
6. Hydraulic oil by passing internally due to worn pump, valve, motor and cylinder. 
=>  Overhaul   or replace faulty components. 

TROUBLE IN HYDRAULIC PUMP fault 6

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"

6) Fault :-  Pump does not work. 

Probable causes and Remidial action.

1. Pressure too low. 
=>  Increase pressure setting. 
2. 'O' Ring on port plate defective. 
=>  Replace 'O' Ring.  
3. Inadequate oil. 
 => Repair pump or change for adequate  delivery. 
4. Too much play in the shaft. 
=>  Replace bearing. 

TROUBLE IN HYDRAULIC PUMP fault 5

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"

5)  Fault :-  Speed loss on pump.

Probable causes and Remidial action.

 1. Inlet pressure too low. 
=>  Increase pressure. 
2. Outlet pressure too high. 
=>  Check system pressure. 
3. Port plate does not make contact. 
=> Dismantle the pump and repair as required. 
4. Oil temperature too high. 
=>  Check circuit. 

TROUBLE IN HYDRAULIC PUMP fault 4

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"

4) Fault :-  Pump develops  no pressure.

Probable causes and Remidial action.

1. Wrong pressure setting. 
=> Modify the pressure setting. 
2    Pressure valve  spool stuck. 
=>  Repair/Replace the valve. 
3.  Leakage in system. 
=>  Replace defective parts. 
4.  Pump shaft broken.  
=>  Replace shaft . 
5.  System contaminated. 
=>  Flush system completely . 
6.  Improper  gaskets and seal. 
=> Replace seals and gaskets. 

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. 

TROUBLE IN HYDRAULIC PUMP fault 2

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"

2) Fault :-  Pump makes noise 

Probable causes and Remidial action.

A) Aeration. 

    i)   Fill  the reservoir with the  oil   up-to required level to prevent aeration. 
   ii) Check all connections on inlet side of pump 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 pump   shaft seal.  Change, if required. 
B)  Intake line or  suction filter partly  clogged. 
     Clean or replace the filter or 
       line. 
C)   Pump running too fast. 
 Reduce speed up to prescribed limit. 
D)  Coupling misaligned (Due to this, bearing may get damaged, there will be a play at shaft, abnormal sound will be observed). 
 Realign the pump shaft and      prime mover shaft. 
E)   Reservoir   not  vented properly.  
 Air breather screening element should be cleaned. 
F)   Suction Filter too small in size. 
   Replace by proper size of  filter. 
G)  Air leaks at  pump intake pipe joints and air drawn through inlet line. 
Pour hydraulic oil on intake joints and on observing abnormal sound, tighten the intake joint as required. 
H)  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.
I)  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.   
J)   Shaft seal leaks.
      Replace the seal. 
K)   Foams in oil.
       Vent  the system. 
L)   Casing leaks. 
       First tighten bolts, then check for cracks  and sealing. 
M) Vane spring broken.
       Change spring.
N)    Any part of pump  defective.
         Replace defective parts.
O)     Pump mounting bolts are loose.
         Check   mounting alignment.  Tighten bolts uniformly. 
P)     Foreign bodies in suction line.
         Remove   foreign   bodies, if need flush the system.
Q)    System dirty.
        Flush the system.
R)    Sharp bends in suction line.
        Eliminate or reduce the bends in suction line.
S)   Oil temperature too high.
      Check the hydraulic circuit. Oil cooler may be ineffective.  Rectify the failure. 
T)  Boost pump failed.
      Check boost pump and repair if 
       required. 
U)  Vibration in system
      Check unusual occurrence in the system.
V)  Pump     worn  or damaged. 
 Pump should be overhauled or replaced. 

TROUBLE IN HYDRAULIC PUMP fault1

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"

1) Fault :-  Pump not delivering oil. 

Probable causes and Remidial action.

A) Pump driven in  wrong  direction (at the time of new pump fitment, this problem may occur). 

Check the pump rotation by hand priming.  Pour the hydraulic oil into inlet port and rotate the shaft.  See whether the oil is delivering  through outlet port or not.  If not, change the rotation according  to the engine shaft rotation. 
B)  Oil  level  too low in the reservoir (if oil level is very low, aeration may take place and pump will not deliver oil). 
Check oil level in reservoir. It should be above minimum mark.  If necessary, recoup the oil. 
C)  Intake  filter/pipe choked.  
Clean  or  replace filter for proper flow of oil. 
D) Air  leaks in pump intake joints. 
Pour hydraulic oil on intake joints and on observing abnormal sound, tighten the intake joint as required. 
E)  Broken pump shaft or rotor. 
Replace the broken shaft or rotor. Also align the prime mover shaft 
F)  Pump speed too slow.  (The delivery rate of discharge is prescribed at a certain rpm of engine.  If engine speed become less than ideal speed, it may affect the proper suction of oil). 
Pump  should  run  at prescribed speed.  Engine rpm should be checked. 
G)  Dirty suction filter. 
  Replace the filter. 
H)   Faulty suction valve. 
   Repair or change the valve. 
I)   Air in system. 
    Discharge air from the system. 
J)   Pump drive inoperative. 
       i)  Replace the broken pump       shaft. 
       ii)  Replace the sheared spline. 
       iii) Change defective coupling.  
K)  Clutch out of adjustment. 
 Adjust clutch. 
L) Pump is damaged. 
Replace with new one.