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Reversing Valve Malfunction - Common Faults And Troubleshooting Methods For Cutter Suction Dredgers

2019-11-01 17:20:33 Jason 2137

Reversing Valve Malfunction - Common Faults And Troubleshooting Methods For Cutter Suction Dredgers

Fault analysis and troubleshooting of the reversing valve


(A) Fault phenomenon: The Spool Does Not Reverse


Failure analysis:

1, The slide valve is stuck

2, valve body deformation

3. The centering spring with the intermediate position is broken

4, The operating pressure is not enough

5, The electromagnet coil burned out or the electromagnet thrust is insufficient

6, The electrical circuit is faulty

7. The hydraulic control reversing valve controls the oil passage to be oil-free or blocked.


Method of exclusion:

1. Unpack and clean the dirt and deburr

2. Adjust the valve body mounting screw to make the pressure tight, force evenly or repair the valve hole

3, Replace the spring

4, The operating pressure must be greater than 0.35Mpa

5, Inspection, repair, replacement

6, Eliminate the fault

7, Check the reasons and eliminate



(B) Fault phenomenon:  There Is A Sound When The Directional Valve Controlled By The Electromagnet Acts


Failure analysis:

1. The slide valve is stuck or the friction is too large.

2. The electromagnet cannot be pressed to the end.

3. The contact surface of the electromagnet core is not flat or has poor contact.


Method of exclusion:

1. Repair or adjust the slide valve

2, Correct the height of the electromagnet

3, Eliminate dirt, modify the electromagnet core




Leader Dredger Company Information:

Mainly for international marketing and exporting for the Dredgers,pipeline,construction machinery etc.

Weifang Leader co isThe only Professional Chinese manufacture for the cutter suction dredger production which combine:Design and reserch,Production,export and after sale service.

The Chinese dredge manufacture who has many branch offices in Asia,Russia,Mid-East,Africa countries etc;

The Chinese manufacture who keep the biggest sale anualy for cutter suction dredgers.

Leader dredger,on the march to a world famous brand name,is your ideal choice for dredging machinery!