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cant get it to raise up

Discussion in 'Fisher Engineering Discussion' started by emtmike, Oct 30, 2010.

  1. emtmike

    emtmike Member
    from Maine
    Messages: 40

    Hi all. My name is Mike and I am new to the site and have learned a lot from it already. I found the site trying to fix a problem with my plow. I run a 2001 F250 with a 8’ Fisher HD MM1. Yesterday I changed the fluid getting ready for another Maine winter. Before I drained it, it worked ok. It was a little slow and I guessed it was a plugged filter. I drained it and pulled the oil reservoir. It had all kinds of slug in the bottom. I washed it out and dried it with a rag. I empted the angle rams, put in a new pump inlet filter, and then put it all together. I filled it with fisher oil and angled the blade back and forth a bunch of times to get the air out. I topped up the oil reservoir and tried lifting the blade. It went up enough to take the slack out of the chain but that was it. I did this a bunch of times and then checked the fluid level with the lift ram retracted all the way. I was just a little low so I topped it up. I tried lifting the blade again and again and it still wont go up. I will angle both ways but will not go up. Got the warden to hold the controls up and I was able to lift the blade with my now hurting back. It did go up all the way and holds there. There was even some smoke coming off the motor like it was getting hot. You can hear the motor running but it doesn’t seem to have the power to lift the blade. I have tried this with the truck running and with it off just incase it mattered. The only thing that did not go as planed was when I was putting the reservoir back on I snapped one of the 4 POS soft cap screws off. The tank doesn’t leak but I am not sure if this would cause the problems I am having. It there any pressure in the tank? I need help.
     
  2. cubanb343

    cubanb343 Senior Member
    from ERIE
    Messages: 637

    Have you checked your cartridge valves?
     
  3. emtmike

    emtmike Member
    from Maine
    Messages: 40

    Like I said I am kind of new to plowing. I have used my ATV for plowing for years and this plow looks way differant than the one on my Suzuki. How do I check the cartridge valves?
     
  4. USMCMP5811

    USMCMP5811 Senior Member
    Messages: 267

    If it last more than 4 hours, be sure to call a Dr..............































    Sorry, couldn't resist.... :laughing:

    viagra.jpg
     
  5. emtmike

    emtmike Member
    from Maine
    Messages: 40

    still need help anybody?
     
  6. ajslands

    ajslands 2000 Club Member
    Messages: 2,033

    Try curssing at it! :D that always seems to work for me!
    Look for a guy named B&B, he'll know what to do!
     
  7. cubanb343

    cubanb343 Senior Member
    from ERIE
    Messages: 637

    go to fisher's website and look up the mechanic's guide for your MM1. That will give you a headstart
     
  8. camaro 77

    camaro 77 Senior Member
    from ma
    Messages: 283

    bad cartridge valve or a bad pump do you have a local fisher dealer may want to have pump pressure checked
     
  9. emtmike

    emtmike Member
    from Maine
    Messages: 40

    Had a chance to take a look at my plow. Like I said if I get one of the kids to hold up on the controls I can lift the plow by hand. It’s hard but I can do it. When I have it all the way up and if I hold up on the controls the plow looks like it is trying to angle. Just in little pulses. Not sure if this information helps in diagnosing my problem or not.
     
  10. RepoMan207

    RepoMan207 PlowSite Fanatic
    from Maine
    Messages: 5,037

    it's not the valves. you don't have enough fluid in it. Put the blade up as far as it will go and block it, top it off, then do the same thing with the angles cylinders; angle it one way, then the other topping it off as you go. I had this same problem when I re did my plow.

    MAKE SURE YOU BLOCK THE PLOW, it will drop on your toes if not. I also went to a very steep hill, and topped it off as well. It will come out of it. It's a PITA, but it's a fairly simple fix.
     
  11. RepoMan207

    RepoMan207 PlowSite Fanatic
    from Maine
    Messages: 5,037

    Where are you in Maine?
     
  12. emtmike

    emtmike Member
    from Maine
    Messages: 40

    I am in Bucksport
     
  13. emtmike

    emtmike Member
    from Maine
    Messages: 40

    OK I did it just like you told me to and still get the same thing. I raised it all the way up, with the help from a chain fall, and blocked it off. I filled the reservoir until fluid flowed out the fill hole. I retracted the lift ram by hand and lifted it and lowered it and lifted it and lowered it. I unblocked the plow and let it down and tried to lift it again and it went up about 2 inches and that was it. I know I had lots of fluid in it because with the ram retracted fluid came out of the vent. Any other ideas?:realmad:
     
  14. camaro 77

    camaro 77 Senior Member
    from ma
    Messages: 283

    have someone put a pressure gauge on it I BET it has a bad pump they get pitted from moisture in the fluid my neighbors did this last year worked for a few min then this exact same thing happened I believe you need 750 PSI min if less its junk the pumps are around 250 for the parts
     
  15. camaro 77

    camaro 77 Senior Member
    from ma
    Messages: 283

    try and get the plow off the ground and put a block or a jack or jack stand under the frame and see how fast or slow it angles left or right also that will also tell you if you have a pressure problem or and up down cartridge problem may have a bad up done pistion also if the plow is fast on angles
     
  16. RepoMan207

    RepoMan207 PlowSite Fanatic
    from Maine
    Messages: 5,037

    This is all stuff I went through as well EMT. VERY frustrating, but Keep doing it, what your most likely seeing is air bubbles coming out more then anything. The pump reservoir isn't so hard to adjust as it is the angle cylinders and there accompanying lines. Have you taken the fill plug off again, and noticed the level....probably low again. If so, it is doing what it's supposed to do.

    Aerating the fluid is something you don't want to do. You'll never get it right if there is little air bubbles in the fluid. So, do a few steps then stop and wait, then keep going. You may have already over done it, but go take a look and see what it looks like.

    Is this a Insta Act or SEHP style pump?
     
  17. B&B

    B&B PlowSite Fanatic
    Messages: 12,777

    Or more likely it isn't picking up what's in there because the pickup is lying in the bottom of the reservoir. :nod:
     
  18. RepoMan207

    RepoMan207 PlowSite Fanatic
    from Maine
    Messages: 5,037

    yupper. That is definitely a possibility as well, especially if this is first time changing one.
     
  19. emtmike

    emtmike Member
    from Maine
    Messages: 40

    OK Tuesday I am pulling the reservoir off it and taking a look. I will let you know. Thanks for all your help everybody. If any of you ever back into a ditch and get stuck just give me a call. Most likely I won’t be able to pull you out because I will most likely be stuck myself (I do that a lot) but we can keep each other company while we wait for the tow truck. :mechanic:
     
  20. emtmike

    emtmike Member
    from Maine
    Messages: 40

    So today I pulled the reservoir off and it was full right to the top. The inlet filter was on good and the tube was still attached to the pump. So how do I check the valves? Anybody have any other ideas.