1972 301-R Hydraulic leak
Results 1 to 6 of 6
Like Tree7Likes
  • 3 Post By flyweight
  • 2 Post By Tx Jim
  • 2 Post By jd110

Thread: 1972 301-R Hydraulic leak

  1. Top | #1

    Join Date
    Jun 2017
    Last Online
    09-26-2019 @ 07:33 PM
    Location
    Texas
    Posts
    4
    Thanks
    0
    Thanked 0 Times in 0 Posts

    1972 301-R Hydraulic leak

    Recently got my 301-R back in service from a bad hydrolic pump. Old one had apparently been going bad for a while but now everything worked perfectly. Until now. About 8hrs of runtime after reassembly, has developed a hydrolic leak as shown in the pic where I am pointing. My question is obviously how to fix. I have the owners manual, which doesn't help here. Is there a mechanics manual (like a Chilton's) that might help walk me through this repair? Also, do y'all think I will have to separate the body to do this or just remove a portion to access?
    Attached Thumbnails Attached Thumbnails 20190908_124127_1567966400289.jpg   20190908_124146_1567966414766.jpg  

  2. Remove Advertisements
    GreenTractorTalk.com
    Advertisements
     

  3. Top | #2
    flyweight's Avatar
    Join Date
    Jun 2014
    Last Online
    Today @ 09:40 PM
    Location
    Louisiana, (southeast)
    Posts
    9,461
    Thanks
    829
    Thanked 1,748 Times in 1,207 Posts
    There's a Packing(item number T17882) that seals the High Pressure Oil from the hydraulic pump. It fits in a inset on the top of the transmission case.
    The Lift Housing(Rockshaft) will have to be unbolted and raised a bit to replace the packing.







    Below is a transmission case and shows where the packing locates.




    Below is a photo of the Rochshaft removed and inverted. The RED arrow shows the passage for High Pressure Oil. This is where the packing seals the oils passage.



    T17882 Packing(item number 4)
    Last edited by flyweight; 09-08-2019 at 07:18 PM.
    Zebrafive, BigJim55 and Tx Jim like this.
    Michael

    2019 JD Z540R 54" cutting deck w/MulchControl™
    1984 JD 750
    1971 JD 15 Chainsaw ← hasn't run since ~1975

    Also have a bunch of other stuff.
    ---------------------------------------

    " If there's no one around to smell me, do I really stink"? - John Wells - Brewster County, West Texas.










  4. The Following 2 Users Say Thank You to flyweight For This Useful Post:

    theduke (09-08-2019), Zebrafive (09-08-2019)

  5. Top | #3

    Join Date
    Jun 2017
    Last Online
    09-26-2019 @ 07:33 PM
    Location
    Texas
    Posts
    4
    Thanks
    0
    Thanked 0 Times in 0 Posts
    Flyweight, thank you so much for the info & taking the time, much appreciated!!
    I will be ordering the service manual tomorrow.
    Something else I may try to tackle while working on it again.. The rear 3pt hitch slowly bleeds down. I assume there is a seal that is leaking causing it to bleed down. Does that sound like something I will have access to with the lift housing off?

  6. Remove Advertisements
    GreenTractorTalk.com
    Advertisements
     

  7. Top | #4

    Join Date
    Oct 2014
    Last Online
    Today @ 02:43 PM
    Location
    Coyote Flats,Texas
    Posts
    1,727
    Thanks
    15
    Thanked 296 Times in 266 Posts
    I think flyweight did an excellent job answering your hyd leak problem.
    Jim
    Zebrafive and flyweight like this.

  8. Top | #5

    Join Date
    Jun 2017
    Last Online
    09-26-2019 @ 07:33 PM
    Location
    Texas
    Posts
    4
    Thanks
    0
    Thanked 0 Times in 0 Posts
    He did!

  9. Top | #6

    Join Date
    Jan 2011
    Last Online
    Today @ 05:42 PM
    Location
    Maryland
    Posts
    884
    Thanks
    5
    Thanked 312 Times in 237 Posts
    Quote Originally Posted by bw-n-alvin View Post
    Flyweight, thank you so much for the info & taking the time, much appreciated!!
    I will be ordering the service manual tomorrow.
    Something else I may try to tackle while working on it again.. The rear 3pt hitch slowly bleeds down. I assume there is a seal that is leaking causing it to bleed down. Does that sound like something I will have access to with the lift housing off?
    Yes, the seals you need to replace are all in the cylinder housing shown in the inverted rockshaft housing. A few orings on valves and seals on piston should take care of you leak down problem. Usually the seals on valve plugs are the ones worn out.
    BigJim55 and Tx Jim like this.

  10. Remove Advertisements
    GreenTractorTalk.com
    Advertisements
     

Bookmarks

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •