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Plow going down slow

Discussion in 'Arctic Sectional Sno-Pusher' started by MItoplock, Dec 21, 2007.

  1. MItoplock

    MItoplock Junior Member
    Messages: 9

    I bought this Arctic plow used and don't know the year or model. But here is the issue I have. The plow works good in all directions, but it goes down really slow. Then once the plow is on the ground the lift cylinder won't go down any further (still have about 2 inches of cylinder up). I have left it in the down position and tried to push it down and it won't budge. Before I started using it it would go down all the way, but now it won't go down far enough to get the lift chain off. Not sure if I have air in it, and if I do I don't know how to get the air out. As I said I don't know the plow model, but if it helps it has the pump mounted in the engine compartment.
     
  2. DAFFMOBILEWASH

    DAFFMOBILEWASH PlowSite.com Addict
    Messages: 1,598

    Have the plow in the float position, then jack up the front of the truck. Does the blade stay on the ground while the front of the truck raises up?? It seems to be a valve body issue more than a air lock up. My guess is that there is a chunk of dirt blocking the pressure relief valve and thus reducing the rate of fall for the blade.

    Have a look at the pump and try to find some serial #'s on it. Write them down and try to find a schematic on your pump system. For I haven't had an under the hood stlye and not sure what they look like. The basics to all the pumps are the same, the only difference is the positions and formatt of valve bodies and wiring.
    DAFF
     
  3. MItoplock

    MItoplock Junior Member
    Messages: 9

    Well, tonight I Jacked the truck up with the control in the down position and the plow stayed on the ground. It is very possible that dirt got in the system, as it was moved around allot until I installed it on this truck. I found some numbers on the pump stamped into the metal, but could not find any information about the pump. In a few days I will start to tear into it, because it is working ok for now and we have a storm coming. I'd hate to do something to make it useless.
     
  4. MItoplock

    MItoplock Junior Member
    Messages: 9

    Had some time to look at it today. The problem appears to be sand in the system. I pulled out what I think is the release valve. It has a screen on it and it controls the lift cylinder. Well the screen was packed full of what looked like really clean sand. I cleaned it off and put it back in, then checked to see how it would lower. It lowered fast 4 times then went back to the way it was. I repeated this 3 times with the same sand getting on the screen. So now that I have found the problem I need to figure out how to clean the system out.
     
  5. DAFFMOBILEWASH

    DAFFMOBILEWASH PlowSite.com Addict
    Messages: 1,598

    Dump the fluid in the system. 5/8" nut at the bollom side of the pump. Drain the lines remove the quick connects and move the blade full right and full left. This will empty the LR rams. pull the valve out one at a time and clean with compressed air or brake clean. Put it all back together and fill the system. Try it out up left right. Repeat the L&R until the blade moves fluidly again.

    Work it for a 10-20min time span and re check the screens. Miight have to re flush system if screens are pluged up again.

    DAFF
     
  6. MItoplock

    MItoplock Junior Member
    Messages: 9

    Well it works finally. I flushed it two times then cleaned the screens two more times after it was flushed. I haven't gotten anymore sand on the screens and the plow drops fast as it should.