Trouble in Hydraulic Pump
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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.
Now we study about "Hydraulic Pump"
2) Fault :- Pump makes noise
Probable causes and Remidial action.
A) 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.
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