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uni mount oil filter clogging

Discussion in 'Western Plows Discussion' started by robber27, Dec 11, 2013.

  1. robber27

    robber27 Member
    from NE Iowa
    Messages: 54

    Every four hours of run time my oil filter screen keeps clogging with white junk, moisture no doubt. I have replaced the motor gasket each time this happens. Is it safe to drop heet or seafoam into the mix to keep this from happening? Thanks
  2. dieselss

    dieselss PlowSite Fanatic
    Messages: 11,398

    How is the water getti.g in there. You need to start there. What's the lift ram look like? How are the angle rams? If there pitted at all might be time for replacement. Also the lift ram nut and packing.
  3. 2COR517

    2COR517 PlowSite Fanatic
    Messages: 7,115

    are you just draining the reservoir? Or tearing the hydraulics down so you can drain all the rams, hoses, and valve body too?

    Meyer makes a product called Hydra Flush which is highly recommended
  4. mishnick

    mishnick 2000 Club Member
    Messages: 2,353

    That white stuff that looks like snot is certainly frozen water. You need to purge your system and replace all the fluid. Use proper Western plow fluid not auto tranz fluid. Once you have done that make sure your reservoir is sealed. If it's an old style hydro unit with the integrated lift cylinder then there is an air pocket in the aluminum reservoir and solid plugs. Make sure you are not using vented plugs as they let moisture in every time you lift and drop the plow because it is breathing. This system compresses and decompresses that bit of air in the chamber like a balloon. If you have a newer style plow with the grey plastic filler plug then try to blow through it. If you can then it is shot. These vent plugs are like radiator caps as they have a 5 lb. pressure relief valve built in. This allows the pressure to escape if it exceeds 5 psi like when you overfill it. Otherwise it just fluctuates between 0 and 5 psi as the fluid level goes up and down. imagine the air in the top of the reservoir compressing like a bladder or a balloon. The idea here is to prevent air from flowing in and out of the reservoir. Plow oil is highly modified aircraft grade hydraulic fluid. Since the fluid never gets hot (unlike trans fluid) the oil must have stable viscosity across a very wide range of temperatures. What they do to make it have this property causes the fluid to become a "desiccant" or an absorber of water... just like brake fluid. So, you don't want your reservoir "breathing" in and out every time the fluid level goes up and down. If it does breath then the fluid will absorb moisture and will develop that white snot on the sump screen. Hope that helps.....