The Failure analysis of gear pump
Phenomenon cause exclusion methods
The discharge quantity of oil is little the level of oil tank is low add oil to stipulates quantity
the Pipeline or oil leak detector was Clean or replace
The Pressure of Pump is low Lining board damaged replace
spill valve improperly adjusted Adjust the pressure of spill valve by pressure gage to specified value
System with air Re-tighten the oil-absorbing side pipeline
There is noise when Operating oil suction pipe damaged or Oil filter blocked Check the pipe or Maintenance the oil filter
Loose or leak of the suction side Tighten the loose
Oil viscosity is too high Using viscosity oil compatible with operating temperature of the pump
There are bubbles in the oil Find the cause of bubbles and to take measures
The oil spilled from the pump Pump oil seal or seal damaged replace
The pump is damaged replaces
The Failure analysis of multi-way valve
Fault cause treatment method
Lifting oil pressure is not high Slide-valve block Cleaning after decomposed
Oil hole plug Cleaning after decomposed
Shock pressure rise slowly Slide-valve block Cleaning after decomposed
Exhaust is not fully Full exhaust
Steering oil pressure is greater than the specified value Slide-valve block Cleaning after decomposed
Oil hole plug Cleaning after decomposed
Amount of oil does not meet the provisions spill valve adjusted wrong adjust
noise spill valve adjusted wrong adjust
Sliding surface wear Replace the spill valve
External oil leak O-ring aging or damaged Replace o-shape sealing ring
The set pressure is low Spring broken Replace spring
Valve seat damage Adjust or replace the spill valve
Internal leak oil Valve seat damage Fix seating faces
The set pressure is high Valve block Cleaning after decomposed
The analysis of Battery failure
Fault Feature cause Remedial and preventive measures
Plate can鈥檛 be reversed sulphation 1. Reduced battery capacity.
2. Electrolyte density lower than normal.
3. Start charging and the battery when the charging is completed the Terminal voltage is too high.
4.Charging early bubble or charge so that they have a bubble.
5.When charging,the electrolyte temperature rises too quickly.
1.Insufficient charging at the beginning.
2. Has been discharged or placed half a discharge status for too long.
3. Insufficient long-term charge.
4. Often excessive discharge.
5. Electrolyte density exceeds the specified value.
6. Electrolyte fluid is too low, cause plates were exposed on liquid surface.
7. do not be balanced charged in time.
8. The discharge current is too large or too small.
9. The electrolyte not pure.
10. Internal short circuit of local effects or leakage.
1. the Light to adopt a balanced charge approach.
2. serious to use of "water therapy".
3. can't over discharge
4. The electrolyte density can't exceed the specified value.
5. The electrolyte liquid surface height and impurity content should be within the prescribed scope.
short circuit Inside the battery 1. When charging the battery, the terminal voltage is very low, even closer to zero.
2. End of charging ,the bubbles fewer or no bubbles.
3. When charging, the electrolyte temperature rise faster and the density rise slowly not even rising.
4. open circuit voltage of Battery is low,Discharge prematurely to cause the voltage terminated
5. Self-discharge serious.
1. Plate bending, swelling or loss of active substances, leading to partition damage, causing a short circuit
2. Sediment too much, resulting in short-circuit.
3. the conductive material Fall into the battery,resulting in short-circuit.
1.Replacement clapboard.
2. To remove sediment and conductive material.
3. Replace plate.
  1. Reduced battery capacity.
2. Electrolyte turbidity.
3. Too much sediment.
1. Electrolyte does not meet the quality standards.
2. Charging and discharging too frequently or over charge, over discharge.
3. When charging, the electrolyte temperature is too high.
4. When discharging,the external circuit happen short circuit.
The light to remove sediment,The serious to Scrap