Results 1 to 7 of 7
  1. #1
    New Member
    Join Date
    Feb 2012
    Posts
    14
    Location
    lowell vt
    Tractor
    b7100

    Default Proper way to adjust pto shaft

    I snapped off my pto shaft on my b7100 and now I begin to think the reason why was because I never adjusted my pto shaft to the tractor when I bought my brush hog. I drove over a log, it raised the BH and the pto snapped.

    I fixed it taking advice from this site, but then realized I never gave the shaft a second thought when I bought the BH. Was it too long?


    Is there a methodical way to check the length for proper operation?

  2. #2
    Super Member smstonypoint's Avatar
    Join Date
    Oct 2009
    Posts
    5,360
    Location
    SC (Upstate) & NC (Piedmont)
    Tractor
    NH TN 55, Kubota B2320 & RTV 900, Bad Boy Outlaw 61" ZTR

    Default Re: Proper way to adjust pto shaft

    Quote Originally Posted by vtmbz View Post


    Is there a methodical way to check the length for proper operation?
    Here's a video from Ted Corriher: How To Video Demos - Implements & Attachments

    Steve

  3. #3
    Elite Member gwdixon's Avatar
    Join Date
    Jul 2009
    Posts
    2,956
    Location
    Northern CA

    Default Re: Proper way to adjust pto shaft

    Quote Originally Posted by vtmbz View Post
    I snapped off my pto shaft on my b7100 and now I begin to think the reason why was because I never adjusted my pto shaft to the tractor when I bought my brush hog. I drove over a log, it raised the BH and the pto snapped.

    I fixed it taking advice from this site, but then realized I never gave the shaft a second thought when I bought the BH. Was it too long?


    Is there a methodical way to check the length for proper operation?
    The only "adjustment" to the PTO shaft is to make it shorter so that it fits between the tractor's PTO shaft and the implement's PTO connection. A minimum of 6" overlap engagement is recommended - more is better, to a point.

    Assuming that the PTO shaft could be put on while the tractor and implement were hooked up, the shaft was probably not too long. The forward motion of the PTO shaft to hook up to the tractor indicates the safety margin. Without seeing a photo of the set-up, 4" to 6" of forward movement to hook up is likely enough.

    My bet is that the log you drove over jammed the stump jumper (if the implement has one) and the shear pin or slip clutch did not protect the system.

    You are lucky that serious damage wasn't done to the tractor's PTO function.
    Last edited by gwdixon; 04-23-2012 at 09:57 AM. Reason: grammar
    2009 Kubota M7040, R1s, LA1153 FEL, fork lift, 3 rear remotes, T&T
    2002 Kubota L48 TLB, 12", 18", 24" HD buckets
    2001 Kubota BX2200, Turf, LA211 FEL
    7.5' Howse 3PT disc, 88" Gearmore 4G4 box scraper, 4' box scraper, Gearmore GB85 blade, LandPride RCR2596 cutter, 6', 4' flail mowers, 6', 4' rototiller, 4' Bush Hog cutter, HD subsoiler, Bearcat 70554 chipper, Bush Hog PHD w/ 12", 6" augers, Ford 101 3-bottom plow, 8' land leveler, 6' rake, lots of misc.

  4. #4
    Elite Member nybirdman's Avatar
    Join Date
    Feb 2009
    Posts
    3,113
    Location
    north of upstate ny
    Tractor
    Kubota L4240 HSTC,L3000DT

    Default Re: Proper way to adjust pto shaft

    If you purchased your BH used,make sure the slip clutch is working or if equipted with a shear pin that it is a shear pin and not a grade bolt.

  5. #5
    Epic Contributor RoyJackson's Avatar
    Join Date
    Nov 2001
    Posts
    20,630
    Location
    Bethel, Vermont
    Tractor
    John Deere 4520 MFWD, Deere 855D UTV, Z920A Zero Turn Mower and assorted implements

    Default Re: Proper way to adjust pto shaft

    After reading gwdixon's post...are you sure the PTO drive shaft snapped? Or, could it be just the shear pin functioning as designed?

    The only way I can see the PTO drive shaft snapping is if the log pushed the forward end of the cutter up and hit the drive shaft.

    I agree with gwdixon...if it's not just the shear pin sheared, you're lucky it didn't damage the tractor's PTO stubshaft or gearing. That can be expensive.
    Roy Jackson

    "Any government that does not trust its citizens with firearms is either a tyranny, or planning to become one."
    -Joseph P. Martino

  6. #6
    New Member
    Join Date
    Feb 2012
    Posts
    14
    Location
    lowell vt
    Tractor
    b7100

    Default Re: Proper way to adjust pto shaft

    I definately snapped the pto output shaft since I had to replace it. I guess I just didnt realize what a binding pto drive shaft will do to the output shaft.

    And now I do! I guess I thought the lift arms on the 3pt had a stop on them but maybe they dont.

    3pt hitch geometry is not something I understand very well.

  7. #7
    Epic Contributor RoyJackson's Avatar
    Join Date
    Nov 2001
    Posts
    20,630
    Location
    Bethel, Vermont
    Tractor
    John Deere 4520 MFWD, Deere 855D UTV, Z920A Zero Turn Mower and assorted implements

    Default Re: Proper way to adjust pto shaft

    Oh, you snapped the tractor's PTO stub shaft?
    Ouch!
    Roy Jackson

    "Any government that does not trust its citizens with firearms is either a tyranny, or planning to become one."
    -Joseph P. Martino

Similar Threads

  1. PTO shaft tubes -- economical? where to buy?
    By wrooster in forum Parts/Repairs
    Replies: 11
    Last Post: 10-13-2011, 05:00 PM
  2. PTO shaft advice
    By CECILSSTEEL in forum Ford Vintage Tractors
    Replies: 3
    Last Post: 09-07-2011, 10:15 PM
  3. PTO Shaft run-out
    By Jay4200 in forum Attachments
    Replies: 6
    Last Post: 12-20-2010, 02:19 PM
  4. Did I hurt my PTO shaft?
    By DmansPadge in forum Attachments
    Replies: 17
    Last Post: 08-16-2007, 04:29 PM
  5. Snowblower Proper way to connect PTO shaft to snowblower?
    By jim_wilson in forum Attachments
    Replies: 4
    Last Post: 03-22-2005, 11:44 PM

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •  
© 2016 TractorByNet.com. TractorByNet is a registered trademark of IMC Digital Universe, Inc. Other trademarks on this page are the property of their respective owners.