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843 wont REV up

Discussion in 'Skid Steers' started by thebig450es, Jul 1, 2011.

  1. thebig450es

    thebig450es Well-Known Member

    Joined:
    Sep 25, 2009
    Messages:
    199
    Location:
    pittsburgh
    I have an older 843, the serial number is 5020-M-12060. It starts and idles but it wont rev up. I looked at the linkage from the throttle lever to the engine and it looks fine. Could it be the injector pump or what else could it be? Thanks
     
  2. thebig450es

    thebig450es Well-Known Member

    Joined:
    Sep 25, 2009
    Messages:
    199
    Location:
    pittsburgh
    Could it be the fuel filter?
     
  3. willie59

    willie59 Administrator

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    Dec 21, 2008
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    Occupation:
    Service Manager
    Location:
    Knoxville TN
    Well, you need to for certain make sure it's getting good fuel supply. Fuel filters are rather cheap, so no big loss replacing it. Typically, buy not definitively, when you have a fuel restriction, such as clogged filter, if the motor will run smooth at idle it will at least rev just a bit, but won't work under load hardly at all. If it runs smooth at idle, you may have a broken governor control spring on the throttle control. Go through your fuel supply system first before looking into governor control.

    Have you checked that the shutoff valve on right side behind cab is fully open? Check to make sure air bleed knob valve on fuel return line connection to injection pump is fully closed? Check to make sure lift pump is sending fuel to injection pump?