Valve Solenoid testing on mini digger

[Dave177]

I have a 2004 Hanix excavator that has developed a fault constantly blowing the option fuse and loosing control of the joysticks. I have traced back the loom and tested each part except the attached picture. The parts manual says it is the Valve solenoid. My questions are:

What is its role? should it get very, very hot, when the rest of the valve block is cold? how can I test it and if it is knackered are they universal or would it have to be a manufacturer part?

Thanks in advance

[predator]

Had troubles in the past with overheating coils caused by shorting out internally water ingress and cracked plastic outer shield >>> also can cause a very slow fuse blow too try swapping it with another to eliminate the fault

[geoff]

That is most likely your fault on the machine, try Cautrac, they are in colchester & are good people for bits.

 

Cautrac | Tracked Dumpers | Leading Construction Machines & Parts Supplier

[WeFixIt]

I have a 2004 Hanix excavator that has developed a fault constantly blowing the option fuse and loosing control of the joysticks. I have traced back the loom and tested each part except the attached picture. The parts manual says it is the Valve solenoid. My questions are:

 

What is its role? should it get very, very hot, when the rest of the valve block is cold? how can I test it and if it is knackered are they universal or would it have to be a manufacturer part?

 

Thanks in advance

 

 

To answer your first question

The solenoid valve is in this case a electrically operated hydraulic valve open/closed by supplying a electrical current (12v in this case) through a coil producing a magnetic field which which moves the valve within the valve block when the electrical power is cut the valve returns back to it's starting position (which can be a open position or a closed position)

The coil itself normally found covered in plastic but can also have resin or steel outer casing will get warm with continue use but if reaching a level which it's hot or to hot to touch then it is more than likely the internal insulation has broken down causing it to operate hot and in many cases the outer insulation will swell and split.

 

There is many different types in size and strength/power consumption

It is common the other coil packs on the same valve block are the same and swapping these over may help determine which is at fault if you are unsure

The replacement part is usually easily available from your local dealer matching up to alternative part is possible but not alway easy/simple

 

 

Is it a chipper, is it a mower or another broken stump grinder who cares we'll fix it!

Edited August 13, 2014 by WeFixIt

[Breezeblock]

from the drawing it looks like its a safety solenoid i would reckon round about 24 ohms for the coil if you look in the end of the coil there might be a button that you can push in to bypass it some have a screw in bypass if dismantle the valve you might be able to pack the back of the spool to work permanently but you will have no safety circuit