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Bobcat s 70 overheats

Discussion in 'Mini Skid Steers' started by Cat digger, Mar 6, 2015.

  1. Cat digger

    Cat digger Member

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    Feb 12, 2015
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    Occupation:
    Excavating
    Location:
    Bucks county pa
    Bobcat s70 overheats after about 45 min. Anyone know about temp control sender not my machine but a good friends trying to help him thanks guys

     
  2. Hardline

    Hardline Senior Member

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    Occupation:
    Small business owner
    Location:
    Waxahachie Texas
    My first thought is to blow out the coolers. The. Check to be sure the belt is in good shape and not slipping. 45 minutes is too long for the thermostat to be stuck or water pump out.
     
  3. Cat digger

    Cat digger Member

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    Occupation:
    Excavating
    Location:
    Bucks county pa
    This machine has two elec fans. They won't come on. Didn't know if he has a bad sensor or even what to ck first. Good water circulation
     
  4. Paul Six

    Paul Six Well-Known Member

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    Location:
    Belgium
    what we did is changing the connectors of the fan system they turn all the time no more problem
     
  5. The Learner

    The Learner Well-Known Member

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    Occupation:
    Hydraulic specialist
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    SE Victoria Australia
    s70 fans are ignition powered as far i knew if they arent turning you have an issue
     
  6. crewchief888

    crewchief888 Senior Member

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    fans should come on when he key is turned on,
    start by checking your fuses and relays, then check for power at the fan harness connector.

    i believe the fan relay is on top of the engine tied off to the harness.

    they were that way on the 463, i'm not sure about the S70


    :drinkup
     
  7. Cat digger

    Cat digger Member

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    Occupation:
    Excavating
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    Bucks county pa
    Thanks guys I'm on it Will let u know what we find
     
  8. Cat digger

    Cat digger Member

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    Occupation:
    Excavating
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    Bucks county pa
    Was just fuses. How two separate fuses blow together gets me I guess any thing is possible
     
  9. Bill Smith

    Bill Smith Senior Member

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    Dec 20, 2009
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    Occupation:
    Rental House Owner
    Location:
    The Near North
    I can tell you how the 2 fuses got blown on my s 70. I was using the machine one snowy day to clear sidewalks .I shut the machine down and walked away . Went to use it the next day it would over heat . Sure enough fan fuses blown .Now realizing that the fans run all the time . Got back in the machine next morning and fired it up . The fans were not working .Sure enough fuses blown again . What I found out just by luck was when i shut the machine off In snowing conditions , the snow would melt through the rad and freeze on the fan blades . You can figure out the rest . Crappy design .
     
  10. ITAMECH61

    ITAMECH61 Member

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    Jan 31, 2016
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    Location:
    venezuela
    Hi cat digger the radiator is clean? Insaide and out side if the water dont interchange temperature the engine temperature increase gradualy with time of working. And other test you can do it is run the engine at low idle and check the temperature without working the machine if the temperature do not increse may be the radiator is dyrty,other problens its posible to be happen but this is the comon and the first that you can check
     
  11. Bobcatmad21

    Bobcatmad21 New Member

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    Nov 15, 2017
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    Location:
    United Kingdom
    I had the same problem afew weeks ago, the fan fuse had popped out and stopped the electric fans from cooling. did you also notice that once you stopped the engine it wont start up again.

    easy way to notice the fuse has came loose is that on start up when you turn the key a notch to the right for the electrics you should here the fans start up, if they dont then its the fuse for them that just needs popping back i, with mine working on rough ground alot it was coming out regularly so i just taped it in.