Foaming at the pump

[Raymond]

I recently finished rebuilding my MVP which included puting new filters on the pump. After I got everthing back together I tried venting all the air from the system as the western guide expains, but still no joy. I tried what Wyldman had reccomended by cracking the hoses to allow venting. I still have had no luck. Any suggestions as to where I might be sucking in air or another way of venting would be appreciated.:headwall

[Arc Burn]

Pull the hoses from the power unit off and reinstall them,on one rare occassion i had trouble bleeding a Fisher V i just installed,i tryed for hours and couldn't get it.I told the customer to take it and run it,maybe it would bleed itself from use,he never told me till this fall it was still acting up when he brought it in for service,anyhow,the first 2 hoses i pulled practicly hit me in the head they flew off so hard,they were air bound for some reason,i really don't know why,put it back together and it runs like a champ.

Take the breather off and try,it may be plugged,also,when it begins to foam you need to sit back and just let it settle,your only circulating more air,the V's can be tough to bleed sometimes,just be patient.

[wyldman]

Like Don said,be patient.Wait till the fluid settles down some,and releases the entrained air.Then top off again,and bleed.If you continue to work the plow with the foamy fluid,you'll never get all the air out.

Try working the plow back and forth with the blade downhill.This will prevent air from getting trapped at the end of the cylinders.

I usually angle the plow fully to one side to collapse that ram (and push the air out).Then loosen the hose at that ram,and run the plow control the other way to run fluid out the hose.Tighten it up as quickly as possible.Repeat for the other side.Don't forget to fully retract the lift ram to get all the air out too.

[Arc Burn]

Good point,angle the plow completely left and right to move all the fluid and air out,I've never had to loosen a fitting to bleed but at this point it's whatever works!

[wyldman]

Don - that's the way I've always done them.With the ram collapsed,you can't really have much air\fluid left in it.Then when you run the pump,it flushes\bleeds the pump\hose.Great for flushing and bleeding at the same time.

[Arc Burn]

Technically,when bleeding a V you start with ALL cylinders retracted,raise and lower the plow twice completely,then extend and retract the right wing twice,check the fluid and then do the same for the left wing,from there i start angling side to side.

With the extra hoses on the V you have even more air working against you right off the bat,once it foams your wasting your time and testing your nerves:headwall been there,done that:(

[Raymond]

Thanks for the suggestions I will try them out in the morning. Hopefully I can get all the air out.

[Raymond]

The problem ended up being the filter getting uncovered. I extended the hose for the filter so it will stay submerged.