Page 1 of 2 12 LastLast
Results 1 to 10 of 14
  1. #1
    New Member
    Join Date
    May 2013
    Posts
    9
    Location
    MA
    Tractor
    Yanmar 187D

    Default Kubota cylinder retainer bolt

    Greetings
    I've a leak in the dipperstick cylinder on my kubota 4530B backhoe.
    I've tried everything to get the retainer nut out of the cylinder barrel.
    It's the 2" x 1/4" face spanner nut.
    I tried a torch but was afraid to go too hot.
    Any help appreciated.
    Bob

  2. #2
    Advertiser kennyd's Avatar
    Join Date
    Jul 2003
    Posts
    11,864
    Location
    Westminster, MD
    Tractor
    John Deere 4110, 455

    Default Re: Kubota cylinder retainer bolt

    Have you tried a big impact wrench? Those nuts are typically torqued to hundreds of ft/lbs.
    KennyD
    www.boltonhooks.com



    Bolt On Grab Hooks, Weld On Grab Hooks, Specialty Chain Accessories, Specialty Hydraulic Components.

    Simple JDParts Tutorial HERE

    Visit our YouTube Channel

  3. #3
    New Member
    Join Date
    May 2013
    Posts
    9
    Location
    MA
    Tractor
    Yanmar 187D

    Default Re: Kubota cylinder retainer bolt

    Quote Originally Posted by kennyd View Post
    Have you tried a big impact wrench? Those nuts are typically torqued to hundreds of ft/lbs.
    It's not a regular nut.
    it is the threaded retainer at the end of the cylinder barrel.
    It sits flush (a tiny bit recessed) with the end of the cylinder and has 2 x 1/4" blind holes 180 degrees from each other.
    The only thing I can do is put a pipe over the spanner wrench for leverage, but the pins slip out of the retainer.
    Bob

  4. #4
    Platinum Member pjbci's Avatar
    Join Date
    Feb 2012
    Posts
    712
    Location
    Summit. Ms
    Tractor
    JD 4840, 450j, 310, komatsu D31px22, IH 1486, MF 135, MHF TO35

    Default

    You could try a hammer and punch. Gonna distort the holes but works for me.

  5. #5
    Advertiser kennyd's Avatar
    Join Date
    Jul 2003
    Posts
    11,864
    Location
    Westminster, MD
    Tractor
    John Deere 4110, 455

    Default Re: Kubota cylinder retainer bolt

    Quote Originally Posted by uspowers View Post
    It's not a regular nut.
    it is the threaded retainer at the end of the cylinder barrel.
    It sits flush (a tiny bit recessed) with the end of the cylinder and has 2 x 1/4" blind holes 180 degrees from each other.
    The only thing I can do is put a pipe over the spanner wrench for leverage, but the pins slip out of the retainer.
    Bob
    Ah OK, its the "gland" or "packing" nut, I was thinking it was the nut on the end of the rod holding the piston on. Sorry for the cornfusion Bob!


    Have you soaked it with PB Blaster of another penatrant?

    Edit: Are you sure it's a RH thread? Probably is...
    KennyD
    www.boltonhooks.com



    Bolt On Grab Hooks, Weld On Grab Hooks, Specialty Chain Accessories, Specialty Hydraulic Components.

    Simple JDParts Tutorial HERE

    Visit our YouTube Channel

  6. #6
    New Member
    Join Date
    May 2013
    Posts
    9
    Location
    MA
    Tractor
    Yanmar 187D

    Default Re: Kubota cylinder retainer bolt

    Weather is not good here today.
    I've been soaking with PB blaster.
    I'll try the torch again.
    I've been holding off on the hammer & punch as a last resort, i agree it will make a mess of the holes.
    I'll post results.
    Thanks
    bob

  7. #7
    Elite Member wdchyd's Avatar
    Join Date
    Apr 2010
    Posts
    2,701
    Location
    Hooksett, NH
    Tractor
    Kubota B2320

    Default Re: Kubota cylinder retainer bolt

    Make sure the hyd rod can be twisted easily (otherwise the rod is bent and will be tough to loosen the gland)

    using an air-impact hammer on the face while using a spanner wrench will help too.......if it needs more, then spin the cyl around in the vise and hold the 1/4" wide gland in a strong vise and rotate the barrel (you'll need a big strong vise and support the barrel level with the vise)

    using a torch heat up end of cyl barrel (not gland directly) evenly and gradual......if it's getting too hot, walk away, let cool, then reapeat.......sometimes the heat/cool cycle will help due to thermal expansion and the gland will cool down slightly smaller than the barrel
    2010 Kubota B2320 FEL & BH65
    If it ain't fixed don't broke it!

    http://www.tractorbynet.com/content/...-month-wdchyd/

  8. #8
    Super Member
    Join Date
    Feb 2006
    Posts
    8,629
    Location
    VA
    Tractor
    JD2010, Kubota3450,2550, Mahindra 7520 w FEL w Skid Steer QC w/Tilt Tatch, & BH, BX1500

    Default Re: Kubota cylinder retainer bolt

    The impact hammer is a good idea. I would instead employ it on the cyl surface directly outside where the gland screws engage. TURN THE POWER DOWN and, holding the hammer tip located with gloved hand, use a short burst at 3 pts equally spaced. This will disturb the "nut"/"bolt" thread interface and help break the bond that has formed long term. - It will also stretch the metal slightly increasing the circumference of the nut/cyl. The gland screw may then be removable. If not, use different equi spaced impact points [and maybe more power] if you repeat. Short bursts only ... pull the trigger all the way in and let it go immediately - about 10 blows.
    larry
    This side of 40
    JD2010, Kubota L3450/FEL w SK QC, L2550 w FEL
    Mahindra 7520 [Pinky] /FEL w Skid Steer QC/w Tilt Tatch & BH, BX1500 [Mighty Mouse]
    IH37 Baler, CCM165 Drum Mower, JD Rake
    JD 127 bushog, Flail, SK Tilt Tatch , KK tiller, Rhino rear blade, Post driver, post auger, chipper, pallet fork, Grapple/Loader Buddy, Homemade Splitter/DC Welder

  9. #9
    Elite Member wdchyd's Avatar
    Join Date
    Apr 2010
    Posts
    2,701
    Location
    Hooksett, NH
    Tractor
    Kubota B2320

    Default Re: Kubota cylinder retainer bolt

    Quote Originally Posted by SPYDERLK View Post
    The impact hammer is a good idea. I would instead employ it on the cyl surface directly outside where the gland screws engage.........
    the only problem with this is if the cyl barrel is thin (like most all kuboata cyls) and the OP gets a little rough......he'll likely distort and damage the threads and never remove the gland if this happens......if impact is needed on the outside of the barrel then I use just a regular hammer to the outside while using the spanner

    Using the air-impact hammer parallel to the hyd rod (slightly tilted counter-clockwise) will give the same shock benefit without any distortion of the threads.......and the end of the tool can be slightly pointed to dig in without any harm
    2010 Kubota B2320 FEL & BH65
    If it ain't fixed don't broke it!

    http://www.tractorbynet.com/content/...-month-wdchyd/

  10. #10
    New Member
    Join Date
    May 2013
    Posts
    9
    Location
    MA
    Tractor
    Yanmar 187D

    Default Re: Kubota cylinder retainer bolt

    Got it!!
    Perserverence and PB Blaster are the ticket.
    I think soaking in the PB Blaster over time and hitting with a hammer ultimately got it loose.
    Thank you all!
    Bob

Page 1 of 2 12 LastLast

Similar Threads

  1. Troy Bilt sickle mower retainer bearing
    By kdp in forum Wanted Ads
    Replies: 1
    Last Post: 12-16-2011, 10:52 PM
  2. need coulter retainer clamp for JD 412 plow
    By klink in forum John Deere Vintage Tractors
    Replies: 2
    Last Post: 10-22-2011, 01:32 AM
  3. Yoke retainer
    By lragan in forum Yanmar
    Replies: 4
    Last Post: 07-10-2008, 10:55 PM
  4. ck30 Bolt On Rear Hyd Cylinder?
    By mrutkaus in forum Kioti Owning/Operating
    Replies: 0
    Last Post: 02-12-2008, 09:27 AM
  5. PTO shaft retainer?
    By GlueGuy in forum Attachments
    Replies: 7
    Last Post: 04-07-2001, 10:53 AM

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •  
© 2014 TractorByNet.com. TractorByNet is a registered trademark of IMC Digital Universe, Inc. Other trademarks on this page are the property of their respective owners.