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Cat 525 oil light flashing

Discussion in 'Forestry Equipment' started by Doug802, Dec 27, 2018.

  1. Doug802

    Doug802 Member

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    Recently got a 1995 cat 525 and it started flashing while idling what I assume is the tranny oil light on the dash and the buzzer goes of every couple seconds. Everything still operates fine. Has a bunch of trouble codes but idk when the last time they were cleared.
    623e02
    450e02
    081
    452e05
    081
    455e01
    096e03
    030
    248e02
    030
    819e02
    030
    821e04
    081
    168eo2
    upload_2018-12-27_15-59-46.jpeg
     
  2. catman13

    catman13 Well-Known Member

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    1 ) serial number to better give answers.
    2 ) when was the hydraulic filter been changed ?
    3 ) when was the suction screen cleaned ?
    4 ) how does it steer and shift ?
    5 ) do an oil sample and see what is running around in there .
     
  3. rondig

    rondig Well-Known Member

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    Put a piece of black electrical tape over the light...works everytime....but in the meantime...check sump screen and change filter as said above....then cut filter open to see what is in it...
     
  4. Doug802

    Doug802 Member

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    Ok I’ll try to change the hydraulic filter today. Not sure when it was last changed but seemed to shift and steer fine before it started flashing. This skidder is new to me. What side and panel do I have to remove to get to the hydraulic filter and suction screen?
     
  5. Doug802

    Doug802 Member

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    Serial number is
    07z33674
     
  6. Mobiltech

    Mobiltech Senior Member

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    That is a transmission filter bypass light. Change trans filter , if that doesn’t fix it it could be a faulty filter bypass switch or wiring problem.
     
  7. Doug802

    Doug802 Member

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    removed tranny oil filter, the oil is pretty dark for hydraulic oil. Gonna replace both filter and oil and see what happens.
     
  8. partsandservice

    partsandservice Senior Member

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    The oil may be dark but is NOT hydraulic fluid!! Look up the spec oil for transmission and use it. Not sure on that model cat but current cat skidder use TO4 power train oil.
     
  9. Doug802

    Doug802 Member

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    Ya i just referred to it as hydraulic oil but I will put TO-4 spec oil back in today.
     
  10. Nige

    Nige Senior Member

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    That's the engine. The machine Serial Number is 1DN01158.
    By the sounds of it you really need an Operation & Maintenance Manual. It would have given you information on both the warning light and the correct oil to use in the transmission, plus instructions how to change the transmission filter and how to access the suction screen and clean it.
    $86 for a pdf download of a genuine Cat manual. $89 would get you a Parts Manual from the same source.

    Transmission oil should be SAE 30 TO-4 for your climatic conditions.

    upload_2018-12-31_19-25-4.png
     
    Last edited: Dec 31, 2018
    DB2 likes this.
  11. Doug802

    Doug802 Member

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    Ya that would be handy but I thought this site was for helping each other out?
     
  12. Karl Robbers

    Karl Robbers Well-Known Member

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    It is for helping each other out, but when you have a valuable machine the owners operation manual and parts manual are priceless in their ability to provide accurate information when you need it. That's why CAT provide them with new machines. Look at it this way, $170 spent on a couple of manuals could save you $1000's.
     
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  13. kshansen

    kshansen Senior Member

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    I'll second that Karl!

    The best thing about having the manuals, either paper or digital format, is a smart person will take time to read them! Maybe not in one sitting or even in the first week or two but just decide to read a section or two each week. You may be surprised what information there is included in there, many things you may never thought to even ask!

    About 45 years ago shortly after I got a job in the shop at the quarry my dad who was also working there was talking to one of the dealer mechanics working on a Detroit for the quarry. This mechanic told my father that if I really wanted to be a mechanic the best thing would be to take home that close to two inch thick Detroit Diesel manual and read it from cover to cover a little every night.

    That took a few weeks but I was often surprised what I learned from it. I also made it a habit of flipping through the various service manuals at work during coffee breaks and lunch. Won't claim to have retained even 20% of what I read but it did give me a good idea of what was actually in those books and made it much know where to look and how to find information the the following 45 years!

    So Yes, this site is for helping each other out and a good part of that help is having someone like Nige who can let you know where to find the information that over time will save you many times what you may pay up front for the purchase of a couple books.

    A book is just like any "Tool". While I or someone else would not hesitate to loan you the "tool" if you need it for a one time job. How ever if you are going to be doing a job that takes that same tool several times a year to expect someone to lend you that "tool" every time is not reasonable. Plus if you have the "tool" for yourself you will also get better at using it and able to see places it can be used that you might not realize at first.
     
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  14. Nige

    Nige Senior Member

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    Lets' move on to the Diagnostic Codes. To clear them you will need to buy or manufacture a Cat Click Box, aka the 4C-8195 Control Service Tool.
    According to the Electrical Schematic the 4-pin Deutsch connector for the Service Tool should be right around the monitor panel, probably under the dash. I've never worked on this particular model, so youll have to do a bit of hunting to find it.
    Take a look at this thread, it tells you all you need to know about making and using a Click Box.
    https://www.heavyequipmentforums.com/threads/the-famous-cat-click-box.72956/

    1st Question, when you first turn on the key and the panel does its self-test you should see the "SERV CODE" icon light up in the top RH corner of the Message Window where the blue circle is. If it comes on during the self-test but then goes off, you have no Active Diagnostic Codes. All the Diagnostic Codes you listed are what's known as Logged which means that each one of them was there once but is not there at this time.
    If the SERV CODE icon stays on after the self-test then one or more of the Codes you listed in your OP is Active. In order to erase that Codes (or Codes) you first have to fix the problem that caused the Code to be Active, at which point the Code will go from Active to Logged status. At that point it can be erased/cleared using the Click Box.

    upload_2019-1-1_21-32-53.png

    Your Codes are/were: -
    CID 0623 FMI 02 Rocker Switch (Transmission Direction) Incorrect Signal
    CID 0450 FMI 02 Control Switch (Tong Open, Tong Close) Incorrect Signal
    CID 0452 FMI 05 Solenoid Valve (Grapple Counterclockwise Rotation) Current Below Normal
    CID 0455 FMI 01 Pressure Sensor (Tong Close) Below Normal Range
    CID 0096 FMI 03 Fuel Level Sender – Voltage Above Normal
    CID 0248 FMI 02 Cat Datalink – Incorrect Signal
    CID 0819 FMI 02 Cat Monitor System – Incorrect Signal
    CID 0821 FMI 04 Main Display Module – Voltage Below Normal
    CID 0168 FMI 02 Electrical System - Voltage Below Normal Range
     
    Last edited: Jan 1, 2019
  15. kshansen

    kshansen Senior Member

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  16. Doug802

    Doug802 Member

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    Ok thanks for the valuable information, when I turn the key on the Serve code comes on for a second and goes out as if there are no active codes. The transmission fluid bypass light has gone out as well since I have changed the filter and TO-4 fluid.
     
  17. Nige

    Nige Senior Member

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    No problem. SERV CODE goes out so you have no Active Codes at this time.
    Good to hear the change of transmission oil & filter fixed the warning light issue. If the old oil was a dark as you describe it might be an idea to run the machine for 100 hours or so and drop the oil again, because even draining the transmission housing to change the oil would only have dropped somewhere between 2/3 & 3/4 of the total oil quantity in the system. the value of oil is cheap when compared to the value of the component it's protecting.
     
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  18. kshansen

    kshansen Senior Member

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    "Oil cheap, Metal Expensive!" and dead machine makes no money!
     
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