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'Turning up' Fisher hydraulic pump

Discussion in 'General Truck Uses' started by Matt Bachand, Jan 21, 2009.

  1. Matt Bachand

    Matt Bachand Depends on the 6.5

    5,330
    9
    Jun 10, 2008
    Worcester, MA
    When Cleaning out frozen water outta my resevoir I noticed what appears to be a set-screw on my hydraulic pump inside the resevoir. It must control the flow rate of the fluid, making plow movement faster?

    Has anyone tampered with this? I have a backup unit, so perhaps I'll try it on the backup and see if it makes the plow movement faster. I'll post a pic in a few.

    The screw is the shorter one, closest to elmo's hand :) next to the long shaft that goes into the starter like motor.
     

    Attached Files:

    Last edited: Jan 21, 2009
  2. blizzardplowman

    blizzardplowman Crowd Control Staff Member Moderator

    655
    0
    May 3, 2008
    SE WI
    Matt, you can mees with it, 90% of the time it wont go any faster. The "screw" increases the pressure, but you are still limited by the lines. It is normaly set around 1800PSI iirc. A 2500 psi guage in a t set up in one of the angle lines would tell you.
     
  3. woodchuck2

    woodchuck2 New Member

    462
    0
    Oct 1, 2008
    North Creek, NY
    X2, a friend of mine has problems with his once in a while. The plow will work fine one minute and then all the sudden it will go very slow and have little power. He just hops out and does a little fine tuning and off he goes with the plow working fine again. A fisher dealer told him how to fix his plow when he first had problems with it.
     
  4. shortcircut65

    shortcircut65 LT OFD N-49

    2,253
    0
    Jul 29, 2008
    Norwich CT
    my uncle has all fishers on his trucks. the one i used to drive, the plow would move slower than shit, and flop all over the place. if left up for a while, it would eventually fall to the ground. it was on a 01 F-350 V-10. minute mount.

    Ken
     
  5. Matt Bachand

    Matt Bachand Depends on the 6.5

    5,330
    9
    Jun 10, 2008
    Worcester, MA
    I believe that screw is the blade drop screw.

    The plow works... old, big, heavy... but works and still makes $$$$....
     

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