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Tracking problems CAT 320BL

Discussion in 'Excavators' started by will, Mar 21, 2010.

  1. will

    will Member

    Joined:
    Mar 8, 2009
    Messages:
    15
    Occupation:
    Farmer for 19 years
    Location:
    Southeast USA
    Hi All

    I have a 2000 model 320BL that has been a good machine. The last few times i have operated it, when walking it, the speed of the machine will just slow down on its own, and if i keep walking it the engine will slow down. Everything else on the machine works fine. This is in the fast speed, but its also slower than normal on slow speed. I have reached behind the armrest and changed over to manual and it works fine speed wise. Any ideas? Thanks.
     
  2. willie59

    willie59 Administrator

    Joined:
    Dec 21, 2008
    Messages:
    12,814
    Occupation:
    Service Manager
    Location:
    Knoxville TN
    Welcome to the forum will. :usa

    Probably the pressure switches on the main hyd control valve. There's two of them, one for hi drive/throttle, the other for swing I think, something like that. Had a 320B L do the same thing. Replaced both pressure switches, problem gone. They're located next to each other on the front of the control valve, near the center of the valve. ;)
     
  3. will

    will Member

    Joined:
    Mar 8, 2009
    Messages:
    15
    Occupation:
    Farmer for 19 years
    Location:
    Southeast USA
    Thanks. I was thinking it should be a simple fix since it worked fine in manual.