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  1. #1
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    Apr 2002
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    Default PTO DRIVE SHAFT OVERLAP

    I have installed a Pat's easy change on my cat. 2 3 pt. hitch. This has made some of my pto drive shafts have 1 1/2 -2'' overlap on the male and female sharts. I have 67 hp at the pto and am most worried about my 7' tiller. It is equiped with a slip clutch, but I also have lots of rocks.
    How much overlap do you need? What is the downside of running it with 1 1/2'' overlap?
    Thanks. Tom

  2. #2
    Super Star Member k0ua's Avatar
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    Branson, Mo.
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    Kioti DK35se Hydrostat

    Default Re: PTO DRIVE SHAFT OVERLAP

    Quote Originally Posted by Tomas View Post
    I have installed a Pat's easy change on my cat. 2 3 pt. hitch. This has made some of my pto drive shafts have 1 1/2 -2'' overlap on the male and female sharts. I have 67 hp at the pto and am most worried about my 7' tiller. It is equiped with a slip clutch, but I also have lots of rocks.
    How much overlap do you need? What is the downside of running it with 1 1/2'' overlap?
    Thanks. Tom
    OMG stop now. Do no run this PTO with 1.5 inches only of overlap. You are supposed to have at the minimum overlap 1/3 of the total shaft length. Here is what happens. the outer shaft splits and the powered end flails around at 540 rpm in a big arc beating the he77 out of anything it can touch.. I have run one with 5 or 6 inches of overlap, and it worried me so that I bought another much longer shaft. You need to fix this now.

    James K0UA
    James KUA

    Kioti DK35se hydrostat with 2 QA buckets, 48 inch. King Kutter Rotary Cutter. 750 lbs ballast box. Loaded tires, Construction Attachments SSQA Lightweight Pallet forks. EA 50 inch single lid "wicked" Grapple. Satisfied Everlast PA160 welder owner How to add a link to a post . Best way to search TBN


  3. #3
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    Default Re: PTO DRIVE SHAFT OVERLAP

    Hi James.
    You have made a believer out of me. I will replace the shaft.
    Thanks for your insight.

    Tom

  4. #4
    Super Star Member k0ua's Avatar
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    Branson, Mo.
    Tractor
    Kioti DK35se Hydrostat

    Default Re: PTO DRIVE SHAFT OVERLAP

    Quote Originally Posted by Tomas View Post
    Hi James.
    You have made a believer out of me. I will replace the shaft.
    Thanks for your insight.

    Tom
    Good deal We have had a few come on here with a shaft failure.. it is fairly rare but can happen, I just would not want a big metal baseball bat sized thing beating the heck out of the backside of my tractor if the outer shaft should split under load and come apart.. Ouch! goodness knows what could fly off!

    James K0UA
    James KUA

    Kioti DK35se hydrostat with 2 QA buckets, 48 inch. King Kutter Rotary Cutter. 750 lbs ballast box. Loaded tires, Construction Attachments SSQA Lightweight Pallet forks. EA 50 inch single lid "wicked" Grapple. Satisfied Everlast PA160 welder owner How to add a link to a post . Best way to search TBN


  5. #5
    Elite Member gwdixon's Avatar
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    Northern CA

    Default Re: PTO DRIVE SHAFT OVERLAP

    Or...you could get a PTO shaft extender to make up the 4" difference like other Pat's owners have done.

    Pto Adapter 1-3/8 X6 Spline Male X 1-3/8X6 Spline Female Pto Adapter
    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.

  6. #6
    Platinum Member thavil's Avatar
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    Jul 2008
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    741
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    Southern Maryland
    Tractor
    Kubota BX24

    Default Re: PTO DRIVE SHAFT OVERLAP

    For only $20 bucks, I would suggest that you buy the PTO adapter that gwdixon mentioned versus buying new PTO shafts. I ordered the same adapter from Agrisupply last week and received it within 4 days. I hooked up my rotary cutter this morning and what a difference in shaft overlap. Much safer!!
    BX24, 60" MMM, Woods HC48 Rotary Cutter, W.R Long Flat Toothbar, 4' Farm Force Box Blade, Leinbach 7200JR PHD w/ 12" & 9" augers, Cosmo XB 3PH spreader, Pat's Easy Change, Front & Rear Bro-Tek Skid Plates, BXpanded Under Armor/Brush Forks/BH Dolly/Bucket Hooks/Tool Pouch/Work Lights, drag harrow, Larry's Mower Axle Stands, 52" Rachet Rake, Millcreek manure spreader

  7. #7
    New Member
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    Default Re: PTO DRIVE SHAFT OVERLAP

    I have one of these on the way and will see if it gives me the 6-7" overlap I would feel comfortable with.
    Thanks to all.


    Tom

  8. #8
    Silver Member
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    Oct 2007
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    191
    Location
    Kentucky
    Tractor
    AC D10/Kubota 9540

    Default Re: PTO DRIVE SHAFT OVERLAP

    I recently bought a KK 84 inch tiller and the shaft that came with it only over laps 3 1/2 inches. The safety cover crumpled during use due to being to short. I would think that the OP would have the same problem. The shaft for this big of a tiller was only 19 inches ujoint to ujoint when closed. Waiting for some action from the dealer or KK.

    Cary

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