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  1. S

    1981 931B Cooling question

    I know there is a bleed bolt on top of the radiator but also I believe there is one elsewhere. I left my book where the machine is so I will be working on t this coming weekend to see.
  2. S

    1981 931B Cooling question

    Hi everyone, I have a great little 1981 931B I have been using. It runs like a charm outside of the question I have. I noticed the coolant will come out of the overflow from the radiator. This means the radiator cap is seeing enough pressure that coolant is getting past and coming out of the...
  3. S

    1981 931B Transmission leak and confirmation help

    I totally agree with that. I am super grateful. This machine is perfect for my needs.
  4. S

    1981 931B Transmission leak and confirmation help

    Update: My 931B is up and running leak free! I wanted to say thank you to all that provided not only information but guidance through this process. I have run the machine for 4 hours now and its doing what it should be. It may be old but it really runs well and is a HUGE help. Again BIG...
  5. S

    1981 931B Transmission leak and confirmation help

    Thank you I appreciate the information on shimming!
  6. S

    1981 931B Transmission leak and confirmation help

    Thank you and yes I have the paperback and the electronic updated version now. I just hadnt gone through to see the procedure if any is recommended. Sounds like a good idea Pittsburgh Cat Man has for shimming correctly..
  7. S

    1981 931B Transmission leak and confirmation help

    Now I am off to research how I am supposed to determine the shim pack tolerances to prevent the seal and bearing from making contact again. If anyone has the skinny on this I am all ears.
  8. S

    1981 931B Transmission leak and confirmation help

    I was able to source the shim pack working with my local CAT dealer and their dealer network found one up North so its on its way. I had no luck otherwise but.... they did say Puerto Rico does have them but getting them would have been more $. Nige I did check Offroad Equipment but they didnt...
  9. S

    1981 931B Transmission leak and confirmation help

    You were certainly correct and I believe the shimming is the culprit. Luckily the damage is super minor given the seal gave up first and I jumped on it. Everything else looks perfect thankfully. Thank you Nige on the tip to try Offroad Equipment I will be giving them a call now. Fingers...
  10. S

    1981 931B Transmission leak and confirmation help

    Good morning.... Does anyone have a lead on good parts dealers for CAT parts? I am having some trouble finding the shim pack I need Caterpillar 6P-0679 ... Cat says they have it but will take a month to get and the price is not horrible but not great. I am just trying to find other options...
  11. S

    1981 931B Transmission leak and confirmation help

    Just a quick update that I got my parts but also found that Part # 11 in the diagram which is a 46 toothed gear (part of group 9P7243) needed one of the bearings replaced (9S7950) as it had made light contact with the bearing that I was replacing. So with that said I ordered the bearing but...
  12. S

    1981 931B Transmission leak and confirmation help

    Thats the diagram source..... weird my parts book doesnt show that diagram. Would have made my life a lot easier. Thank you I appreciate it
  13. S

    1981 931B Transmission leak and confirmation help

    I think you are right Nige.... Mine doesnt have the (-xx) it is just SEBP1247. I am going to download the (-03).
  14. S

    1981 931B Transmission leak and confirmation help

    Interesting.....I have the SEB1247 but after review mine was published in May 1979.... My unit seems to be from 1981...Vehicle Serial - 29Y1109 ,Engine - 45V31446, Transmission - 1AA01241 My parts book lists my serial as well......but your diagram from your parts book is way better. Even my...
  15. S

    1981 931B Transmission leak and confirmation help

    @Nige so upon further inspection your parts listing is spot on......everything shown matches up.....time to order some parts and pull things apart..... I need to find your manual...I guess its online? Its way better than the books I bought.
  16. S

    1981 931B Transmission leak and confirmation help

    Your parts breakdown you attached is exactly what I needed actually....Not sure why my CAT manual doesnt seem to have that illustration. I also got the parts book so I will review the parts I got vs the what your schematic shows which visually appears spot on. This would explain why my seal I...
  17. S

    1981 931B Transmission leak and confirmation help

    Question...... So without that one o-ring in itself the trans will leak? Sorry I know the question is somewhat silly but I am amazed that this "may" be a primary sealing surface? The reason I ask is this.......So after further inspection this week I found that the plate below only had 3 bolts...
  18. S

    1981 931B Transmission leak and confirmation help

    Thanks Nige I am in luck as I have no wear marks at all thankfully. I will double double check again of course but only the issues is related to the bends mentioned previously on the mounting surface itself. Once I actually pull the seal and check the internal bearings for movement I will...
  19. S

    1981 931B Transmission leak and confirmation help

    When I was researching seal part numbers online because I left my parts book at the workshop I noticed the yoke is used in a few groups so I am not surprised although to Nige's point you will see misc parts being different here and there.
  20. S

    1981 931B Transmission leak and confirmation help

    I had time to take the Yoke and shaft going into the transmission side out. On the bottom right is that the sealing surface you spoke of above? I pulled the yoke assembly but havent gotten the seal out yet as I only had limited time today but will get the rest pulled next weekend. You can see...
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