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Thread: 'Turning up' Fisher hydraulic pump

  1. #1
    Depends on the 6.5 Matt Bachand's Avatar
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    Default 'Turning up' Fisher hydraulic pump

    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.
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    Last edited by Matt Bachand; 01-21-2009 at 08:27 AM.
    1997 Chevy 3500 4x4 Dual Wheel 6.5 TD 156k (D.S. Head rebuilt at 120k) A great truck that gets BETTER with age
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    50 Gallon Bed Mounted Transfer Tank / KYB Monomax Frt / AC_Delco Gas Rear Shocks
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    -1.94 TDCO / Half Assed FTB (Still need to bore out IP fitting) / Switchable TWIN walbro's. (10PSI @ IP)

  2. #2

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    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.
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  3. #3
    Registered User woodchuck2's Avatar
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    Default

    Quote Originally Posted by blizzardplowman View Post
    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.
    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.
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  4. #4
    LT OFD N-49 shortcircut65's Avatar
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    Default

    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.

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  5. #5
    Depends on the 6.5 Matt Bachand's Avatar
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    Default

    I believe that screw is the blade drop screw.

    The plow works... old, big, heavy... but works and still makes $$$$....
    1997 Chevy 3500 4x4 Dual Wheel 6.5 TD 156k (D.S. Head rebuilt at 120k) A great truck that gets BETTER with age
    9' Utility Body w/ Dual Tanks, 9' Fisher Plow / Glowshift Fuel Gauge On Dash
    50 Gallon Bed Mounted Transfer Tank / KYB Monomax Frt / AC_Delco Gas Rear Shocks
    V-Pump Delete / 99." Serp / 2 Walbro FRB-5 / Racor 490r30 Prefilter/Water Separator (10 Micron)
    Strobes all the way around / IssPro Boost/Pyro Guages on A-Pillar / 0-15psi Fuel Pressure on Pod next to A-Pillar
    Heath Turbo Master / 4" Diamond Eye Exhaust / New Bosch Injectors @ 130k
    Twin 195 Robert Shaw T-Stats
    PMD Isolator / 2-way High Idle Switch
    AMSOIL NANO Air filter / Mobil-1 5w-40 Turbo Diesel Formula Synthetic / Synthetic Diff (Front and Rear)
    235/85 16's....
    4l80e Rebuilt at 106k (blew reverse out, my fault)
    -1.94 TDCO / Half Assed FTB (Still need to bore out IP fitting) / Switchable TWIN walbro's. (10PSI @ IP)

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