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Visitor

Re: M318 Stabilizer issue

[ Edited ]

That's exactly where we were looking....or bad packing in the cylinders....and other places....my original post was way too vague. We were even talking about pulling the swivel. 

 

Today we discovered that it was sinply a bad control valve. My boss never even considered it because he's never seen one go bad like this one did in his 30 years of working on machines. We can load pressure raising the blade/stablizers....we get nothing going down. 

 

Now we are just waiting for the new one to arrive from Denmark! 

 

Thank you for your awesome reply!!! 

Visitor

Re: M318 Stabilizer issue

Turns out is was a bad control valve. My original post was so vauge...it coulda been a dozen things. My boss wasn't even considering it because he's never seen one go bad like this in 30 years.

Regular Contributor

Re: M318 Stabilizer issue

aube - good info on the solenoid valves which indicates they should undergo troubleshooting for proper functioning.  Nice to have access to a service manual.

Contributor

Re: M318 Stabilizer issue

from service manual

 

Solenoid Valve (Stabilizer and Blade)

 

Blade Solenoid Valve

Machines that are equipped with a rear blade use blade solenoid valve  in order to control the blade cylinders.

When the magnet of solenoid valve is de-energized, oil flows through the blade solenoid valve. This allows operation of the rear blade.

For individual control of the blade from the stabilizers, the blade/stabilizer switches on the right console must be depressed. The blade/stabilizer switch is actuated when the stabilizers are activated independently of the blade. Placing the control switch in the OFF position energizes the blade solenoid valve so that control spool is moved to the right. The spool now blocks oil flow from pump supply passage (P) to port (A) and from port (B) to tank return passage (T). This prevents operation of the blade.

 

Stabilizer Solenoid Valve

 

Machines that are equipped with front stabilizers use two solenoid valves for the individual control of the stabilizer cylinders.

When the magnet of solenoid valve  is de-energized, oil flows through the stabilizer solenoid valve. This allows operation of the front stabilizers.

For individual control of the stabilizers, the blade/stabilizer switches on the right console must be depressed. The blade/stabilizer switch is actuated for the stabilizer that is not lowered. Placing the blade/stabilizer switch in the OFF position energizes the solenoid valve so that control spool is moved to the right. The spool blocks oil flow from pump supply passage (P) to port (A) and from port (B) to tank return passage (T). This prevents operation of the stabilizer.

Regular Contributor

Re: M318 Stabilizer issue

Sounds like a pump issue here.  What is the history of the symptom?  Did it just develop, or has the problem been steadily progressing?

Visitor

M318 Stabilizer issue

Blade and stabilizers are slow, won't raise machine and won't hold. Rest of work equipment is normal and functioning properly. 

 

Serial number of machine is 8AL01146

 

Any information on this issue or technical updates would be greatly appreciated.