Page 1 of 3 123 LastLast
Results 1 to 10 of 21
  1. #1
    Silver Member
    Join Date
    Jul 2011
    Posts
    186
    Tractor
    Steiner 430

    Default Oil cooler fan

    I am now in the process of trying to get the oil cooler fan to work. I don't have a diagram of the wiring for the PT-422. Does anyone know where the relay to the oil cooler fan is? I have to broken coming off the fan to a toggle switch, from the toggle switch I am not sure where they go.

    Thanks

    Frank

  2. #2
    Platinum Member tmarks11's Avatar
    Join Date
    May 2005
    Posts
    649
    Location
    Port Orchard, WA
    Tractor
    2005 Power Trac 422

    Default Re: Oil cooler fan

    Sounds like you don't have the stock configuration, since they don't have a toggle switch to turn teh fan on/off.

    On most of the PTs, the fan is wired to a temp sensor that is mounted on the inlet to the oil cooler up underneath the hood of teh engine compartment, and the wiring from there runs to the ignition switch. The fan only runs when the oil hits 120F or something like that. On cold days, it might not come on at all.

    There is no relay for the fan.
    -----------------------------------------------------
    Now in Port Orchard, WA
    2005 PT-422
    4n1 bucket, minihoe, auger, 48" mower, land pride aerator, tow adaptor, forklift, crane, Herd GT77 spreader, LMB, 60" blade, M1 abrams turret.
    PT422 (6/23/05) photo page

  3. #3
    Epic Contributor MossRoad's Avatar
    Join Date
    Aug 2001
    Posts
    23,815
    Location
    South Bend, Indiana (near)
    Tractor
    Power Trac PT425 2001 Model Year

    Default Re: Oil cooler fan

    On mine the temp sensor went bad several years ago. I now have a spade connector that I hook up directly to 12V before I start the tractor. Eventually I will wire it to a switch, rather than replacing the temp sensor, since so many people report failure of that part.
    MossRoad

    Click On My Little Tractor
    To See Pictures And Videos
    Of It In Action!!!


  4. #4
    Silver Member
    Join Date
    Jul 2011
    Posts
    186
    Tractor
    Steiner 430

    Default Re: Oil cooler fan

    My PT-422 has a toggle switch mounted on the engine cover. There are two wires coming off the switch that have been disconnected. I did find the the oil tmp sensor. Not exactly sure how to check if it is bad or not. It is connected. It has an inline fuse attached. I think it might be better to use the toggle switch when running. Do you know how to wire the fan direct?

    Thanks
    Frank

  5. #5
    Epic Contributor MossRoad's Avatar
    Join Date
    Aug 2001
    Posts
    23,815
    Location
    South Bend, Indiana (near)
    Tractor
    Power Trac PT425 2001 Model Year

    Default Re: Oil cooler fan

    Find the wires coming off the fan. One should go to ground somewhere. The other should go to a switch, then to a fuse, then to +12V. You can either connect to +12V right off the battery or as in my case with the Kohler engine, there was a +12V lead coming off the engine. Better to go to a relay that is energized by the key switch, so you can't accidentally leave the fan on.
    MossRoad

    Click On My Little Tractor
    To See Pictures And Videos
    Of It In Action!!!


  6. #6
    New Member
    Join Date
    Feb 2014
    Posts
    13
    Location
    N/A
    Tractor
    N/A

    Default Re: Oil cooler fan

    So was running the PT today for the first time in warm weather (~80F) and after an hour or so the fan hadn't come on at all and I started to get a little surging like bad gas. Not sure if it overheated, but it definitely doesn't run as smooth at idle and has some oil in the carb and is not starting as easily. Going to check the valves and see how that goes. Running at 1/4 throttle feels the same as always.

    Anyway, fan had a bad temp switch. All I did was run a jumper wire from one side of the switch to the other and the fan runs perfect. Turns out the positive lead from the battery to the temp switch is wired for ignition-on only, so if the PT is running, so is the fan. Two minute fix. Now I just gotta hope the lack of a fan today didn't do any damage.

  7. #7
    New Member
    Join Date
    Feb 2014
    Posts
    13
    Location
    N/A
    Tractor
    N/A

    Default Re: Oil cooler fan

    So was running the PT today for the first time in warm weather (~80F) and after an hour or so the fan hadn't come on at all and I started to get a little surging like bad gas. Not sure if it overheated, but it definitely doesn't run as smooth at idle and has some oil in the carb and is not starting as easily. Going to check the valves and see how that goes. Running at 1/4 throttle feels the same as always.

    Anyway, fan had a bad temp switch. All I did was run a jumper wire from one side of the switch to the other and the fan runs perfect. Turns out the positive lead from the battery to the temp switch is wired for ignition-on only, so if the PT is running, so is the fan. Two minute fix. Now I just gotta hope the lack of a fan today didn't do any damage.

  8. #8
    Platinum Member tmarks11's Avatar
    Join Date
    May 2005
    Posts
    649
    Location
    Port Orchard, WA
    Tractor
    2005 Power Trac 422

    Default Re: Oil cooler fan

    Quote Originally Posted by Injuredoften View Post
    ...I started to get a little surging like bad gas. Not sure if it overheated...Now I just gotta hope the lack of a fan today didn't do any damage.
    No worries.

    I would bet $$$ that you were starting to experience vapor-lock in the fuel pump. The close proximity of the fuel pump to the exhaust can cause all sorts of bad behavior, and the extra heat under the hood without the fan probably put your engine over the edge.
    Last edited by tmarks11; 04-12-2014 at 11:47 PM.
    -----------------------------------------------------
    Now in Port Orchard, WA
    2005 PT-422
    4n1 bucket, minihoe, auger, 48" mower, land pride aerator, tow adaptor, forklift, crane, Herd GT77 spreader, LMB, 60" blade, M1 abrams turret.
    PT422 (6/23/05) photo page

  9. #9
    Epic Contributor MossRoad's Avatar
    Join Date
    Aug 2001
    Posts
    23,815
    Location
    South Bend, Indiana (near)
    Tractor
    Power Trac PT425 2001 Model Year

    Default Re: Oil cooler fan

    I doubt you did any damage without the fan running. My fan has to be hooked up to +12 manually and sometimes I forget for hours and hours. Probably not good in the long run. But once in a while probably did nothing to be worried about. Rest easy.
    MossRoad

    Click On My Little Tractor
    To See Pictures And Videos
    Of It In Action!!!


  10. #10
    Veteran Member
    Join Date
    Jun 2006
    Posts
    2,127
    Location
    West Cascades Washington State
    Tractor
    PT 422

    Default Re: Oil cooler fan

    A little oil in the intake is normal too. And the surging sounds like a fuel issue.

Page 1 of 3 123 LastLast

Similar Threads

  1. ASV-Loftness Oil Cooler? Reversing fan?
    By groundhawg in forum Land Clearing Equipment
    Replies: 4
    Last Post: 10-12-2007, 01:48 PM
  2. ASV-Loftness Oil Cooler? Reversing fan?
    By groundhawg in forum Construction Equipment
    Replies: 4
    Last Post: 10-12-2007, 01:48 PM
  3. Oil cooler update Install (Hydro oil cooler)
    By MikeBurr in forum New Holland Buying/Pricing
    Replies: 1
    Last Post: 05-21-2006, 05:16 PM
  4. Oil cooler fan....
    By Farmall140 in forum Power Trac
    Replies: 12
    Last Post: 11-16-2004, 09:54 AM
  5. Oil cooler fan thread
    By MossRoad in forum Power Trac
    Replies: 1
    Last Post: 11-16-2004, 08:35 AM

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •  
© 2014 TractorByNet.com. TractorByNet is a registered trademark of IMC Digital Universe, Inc. Other trademarks on this page are the property of their respective owners.