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  1. S

    Please Help Cat D8L Transmission Overheating

    Thanks Nige - I will adjust and report back …… next weekend :-)
  2. S

    Please Help Cat D8L Transmission Overheating

    Weekend Update II: So I added a a couple shims to the relief valve on the TC and the pressure was reading 78 PSI (third gear stall main brake engaged) - one thing of note, there were a couple shims already in the sleeve, as well as a washer ... Is there a max number of shims you should use...
  3. S

    Please Help Cat D8L Transmission Overheating

    Weekend Update: 1. The beast is back running and the following things have been fixed a. The coolant flow sensor was changed and light no longer blinks. b. Oil cooler changed all leaks sorted - coolant system flushed 3 times with distilled water and new premium coolant filled (Now has new water...
  4. S

    Please Help Cat D8L Transmission Overheating

    I put on cooler Saturday about noon and filled it Sunday about 6pm, and the sealer stated it could be used immediately 500 deg F jargon … oh man now second guessing putting sealant on gasket :-(
  5. S

    Please Help Cat D8L Transmission Overheating

    Weekend update: I put back on the new (cleaned) oil cooler, no blanked lines as well as putting in the new water pump and all new seals etc. Man what a job to do with your 6 year old boy! I filled up the radiator with some flush cleaner, and while I was filling it noticed that my seal on the...
  6. S

    Please Help Cat D8L Transmission Overheating

    Update - I removed the oil cooler and took it to a shop in Oklahoma City that cleans and services the coolers regularly. They said mine wasn't that dirty :-(, so I will put it all back together this weekend. Just a quick thought I had, on the left side of the cooler, there is the small outlet...
  7. S

    Please Help Cat D8L Transmission Overheating

    Nige, That was my thought exactly … I just need to motivate myself to get under the machine in 90+ deg weather … I guess at least i'll be out of the sun :-)
  8. S

    Please Help Cat D8L Transmission Overheating

    This weekend I will remove the cooler, I suppose there isn't any way around draining all the oil?
  9. S

    Please Help Cat D8L Transmission Overheating

    That looks 100% like what I have, any good way to check the relief valve?
  10. S

    Please Help Cat D8L Transmission Overheating

    Turbo, Do you have any experience with those valves sticking shut? Do you know the PN for the valve body? I'll climb under her tomorrow and take a picture, but when I changed the sending unit, it looked like it was attached to that? Will I get a ton of oil out of the system if I take out the...
  11. S

    Please Help Cat D8L Transmission Overheating

    I'm planning on going out tomorrow after work and will take a picture and see if I can find it. Stupidly I didn't when I was working on it …
  12. S

    Please Help Cat D8L Transmission Overheating

    Thanks Stan, I just took a photo of the book page as in the image below. Do you know the PN for the relief valve? I can't find it in my parts manual.
  13. S

    Please Help Cat D8L Transmission Overheating

    Thank you all very much for your help so far - I wanted to give you all an update. This weekend I didn't have much time but I was able to test the transmission pressures with the new better resolution gauges. All tests were inline, unfortunately I left my sheet of paper at the ranch, but I will...
  14. S

    Please Help Cat D8L Transmission Overheating

    Thanks for the suggestions Mark & Nige, I do have a brand new water pump for the old girl. I bought it at an auction with some other spare parts before another D8L went up for sale (I ended up not getting that one). I'll look in the book, but I take it that I'll have to drain the radiator to...
  15. S

    Please Help Cat D8L Transmission Overheating

    Nige, Thanks again! I was out at the ranch yesterday and worked on the dozer a bit, I checked all the electrical connections and cleaned all parts. I haven't moved the dozer in a couple weeks and this time, when I went to engage the right brake nothing happened - The left engaged, but further...
  16. S

    Please Help Cat D8L Transmission Overheating

    Thanks Nige - I’ll do as you recommended in regards to getting her hot Monday. I wish I could upload my iPhone Live Photo that shows the light flickering just as the transmission temperature exceeds 100 deg C.
  17. S

    Please Help Cat D8L Transmission Overheating

    Thanks for the feedback Nige, I uploaded some pics of the gauges when it was hot as above, if I let it get any hotter the power shift temperature light will flicker. Next time I’m out there I will time exactly how long it takes to get hot and at high idle how long it takes to cool down...
  18. S

    Please Help Cat D8L Transmission Overheating

    I don’t have the old filters, but did cut them and squeezed in vice and did not notice any metal flakes? I did have oil tested and listed it above
  19. S

    Please Help Cat D8L Transmission Overheating

    I miss Scotland! I lived / worked out of Aberdeen for 4 years! Had many a good night on Crown Street!
  20. S

    Please Help Cat D8L Transmission Overheating

    I have uploaded the gauges as hot as I let it get after about 30 minutes of medium - hard pushing at 85 deg F ambient conditions
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