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pump issue

Discussion in 'Western Plows Discussion' started by plarena, Nov 9, 2012.

  1. plarena

    plarena Junior Member
    Messages: 2

    i have an 8 foot ultramount and the other night it was working fine for a few hours then out of no where it hesitated on going up and when trying to angle left it kept jerking and banging.checked fluid and it was full.i am going to take the pump apart this weekend and change filter and inspect valves, has anyone ever experienced this or heard of someone who has,im just curious as what to look for when taking apart.thanks
  2. mishnick

    mishnick 2000 Club Member
    Messages: 2,353

    It may be that you just have some moisture in your fluid. When was the last fluid change? If the fluid is old ice crystals can form on the sump screen which blocks the flow of fluid. The plow will act as if it is out of fluid causing iratic action. Typically people complain that it worked fine initially but as the night went on it got worse. The next day, after sitting in a warm shop, it worked fine again.... The water freezes when out in the cold causing failure and then in the warm shop it melts and the symptom dissapears.

    If you have the older style ultra-mount flowstat hydro unit take off the four screws holding the reservoir on and pull the whole reservoir off with the fluid still in it. Pour the fluid out into a jug so you can see it as it flows. If the plow is real cold you will probably find a chunk of ice in the bottom. If warm you will see the beads of water and discoloration. While it is open pull the magnet and clean it off real good. It will be covered in magnetic mud. Check for chunks of metal. Then use compressed air to blow the sump screen out real good. No need to remove it just blow it out where is sits. Then fill the reservoir with clean fluid and put it back on with the four screws. The ability to remove the reservoir is a real advantage on the old style. The new multiplex systems have the reservoir on top and there is a plastic shroud that makes it very hard to remove.
    Last edited: Nov 9, 2012