Air is causing the fluid to foam. Crack the fittings at the angle cylinders and keep angling until all fluid comes out and no air. Then check the fluid level. But the best way is like Chuck has described here. http://www.snowplowing-contractors.com/snowplows.html This is how I change my fluid and I never have to bleed.

 

Lets back up a little. Is this plow new to you? Have you owned it a while? Did you have any problems before you changed the fluid? Are the angle rams pitted? Are the gland nuts dripping oil at all?

Mike posted the link to the way I do it. Never, and I mean never, had a problem with air, or having to bleed anything doing it this way yet.

1. Unhook the plow from the truck.
2. Tip it forward.
3. Lay the face of the moldboard on the ground, with the A Frame sticking up.
If it is plumbed like most E-47's, you have a hose on one cylinder only (the driver's side).
4. Hook both cylinders together with the hose.
5. Colapse the passenger side cylinder which at the same time extends the driver's side cylinder. Now all the fluid is in the one cylinder with the hose on it, on the driver's side.
6. Take both the couplers off.
7. Stick the end of the hose in a milk jug, half gallon juice bottle, etc.
8. Colapse the extended cylinder with the hose on it, expelling all the fluid from it into the jug. Now it is empty, and the other one is full of air. No problem.
9. Now take the end of the hose, cylinder still colapsed and empty, and stick it in a quart of hydraulic oil, making sure it is all the way to the bottom.
10. Extend the cylinder by hand, which will draw the oil into it, and expel the air from the other cylinder.
11. Pull the hose from the oil, and hold it up, wipe it off, and put the coupler back on.
12. Put the coupler back on the other colapsed cylinder.
13. Connect the hose to the other cylinder.
14. Move the plow back to center by hand.
15. Hook it back up to the truck and work it back and forth about 10 times.

99% of the air should be out now. If not, your angle rams are shot, or, the pump was apart, and somebody left the plastic baffle out when they put it back together, and now any time fluid returns to the tank it hits the inside of the lid making foam.

~Chuck

 

still have problem

ok so i've been working the air out and it foams out the breather and air escapes it still has play when you lift the blade it will move about 6 inches each way by hand just wondering if this is still air in the cylinders or if i have bigger problems thanks for the help

 

Okay a few questions

did you drain the entire system including the pump

what type of fluid are you using

the only suggestion i have at this point is to raise the plow all the way, hook the angel cylinders together angle the plow to one side then all the way the way back know hook the lines back up to the pump and angle it the other way using the pump. Now the air should be in the resivour tank. now just drop the plow and it should work its way out through the breather.

 

the only suggestion i have at this point is to raise the plow all the way, hook the angel cylinders together angle the plow to one side then all the way the way back know hook the lines back up to the pump and angle it the other way using the pump. Now the air should be in the resivour tank. now just drop the plow and it should work its way out through the breather.

Did you try this?

 

i drained the entire system including the pump and it seems like it has air in both cylinders yet and is working bubbles and foam to the breather but still seems like it has a lot of air in the angle cylinders

 

try the tecnique i posted above maybe chuck can shead some lite on this also

 

I work at a very big installation, the motor pool actually puts them on a lift so the blade is down so the back of the angle cylinders (closest to the vehicle) are pointed up, then move the blade left to right, they say the air goes to the highest point which is UP. I did mine somewhat the same last year, by pointing it down a hill and working it R-L with the blade a hair off the ground.

 

Ok try angling your plow to the right, unhook the right hand side hose, bump the plow to the left while catching the oil out of the hose, hook it back up then angle the plow to the left. And repeat the procedure for the left side. Thats always worked for me

 

so i was out there today working on it and found that the coupler and 90 swivel are leaking air so i'm going to try to replace them and see if that will help

 

that cant be helping a thing. Youre allowing air to get in to the system

 

ok got new coupling and swivel filled the cylinders and started using it once i started using it it started to foam and let air out so i waited awhile and filled it to proper level and started again foamed up again so i took the couplings apart to see if it was holding air and it seemed that the fluid was foamed in the hoses and probably the cylinders should i wait longer to check it agian or what is up with the foam everywhere using meyers fluid too thanks

 

ok made sure all the air was out of the cylinders and hoses and worked great for the first couple times moving back and forth and then the fluid foamed up again just wondering what else it could possibly be thanks much

 

ok wondering if a leak out of one of the angle cylinders leaking slow cause it to foam up like i'm getting thanks