Results 1 to 8 of 8
  1. #1
    Veteran Member
    Join Date
    Mar 2013
    Posts
    1,402
    Location
    Edmonton, Alberta
    Tractor
    MF 135

    Default Cast iron repair update..

    Went out to take the oil cooler off and see what I was up against. GOOD NEWS! I can thread the boss deeper. It is a separate bracket but bolts onto the bottom of the injection pump so I don't really want to take it off cause it could be a major job. I found out why it broke too. It had about 1/8" that had been broken off previously so there was nothing for the oil cooler to butt up against when the bolt was tight. Cat is known for sometimes having oddball length bolts and both of the mounting bolts had been cut shorter with a hacksaw so they wouldn't go past the threads in the boss's. Funny they never mentioned this when I had the engine completely rebuilt about 6 years ago.

    To repair it I was thinking about using epoxy to hold the broken piece on and then using a tap to cut the threads deeper. I could also build up the previously broken part with epoxy and file it down to the right height. I got a cheap tap to grab enough to hold the broken piece on. I'll get a better tap to finish the threads. Does this sound like a good solution and should I just run the threads deeper and leave them in the broken piece or would it better to drill them out on the broken piece since the deeper threads will hold the oil cooler on? Thanks in advance for your input!

  2. #2
    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

    Without looking at it, i would drill and tap deeper, drill out the old piece and let it just be a spacer that mates up perfectly where it broke from.

  3. #3
    Elite Member Shield Arc's Avatar
    Join Date
    Jan 2009
    Posts
    4,134
    Location
    Figuring the picking points of jelly donuts.
    Tractor
    John Deere, 4200

    Default Re: Cast iron repair update..

    I think I'd try to drill and tap deeper, (be very careful doing that) but also leave the broken piece in place, and epoxy it in place for more added strength. Never done much work with epoxies, wonder if it would help to bevel the broken piece?


    Miller Dynasty 300.
    Lincoln V350-Pro w/pulse.
    Lincoln LF-72 wire feeder.
    Lincoln SG Spool gun.

    Lincoln LN-25.
    1937 IdealArc-300.
    Everlast PowerArc 200.
    Everlast PowerArc 300.
    3 Lincoln SA-200s.
    1800 Ellis saw.
    Hypertherm Powermax 1250, CNC table.
    PROFAX Welding Positioner.
    JD2 model 3.

  4. #4
    Veteran Member
    Join Date
    Mar 2013
    Posts
    1,402
    Location
    Edmonton, Alberta
    Tractor
    MF 135

    Default Re: Cast iron repair update..

    It would help to bevel it to hold it on but I was thinking of using just enough epoxy to hold it in place where it mates up. I put some epoxy on the broken piece on the other end to see if will work against the oil cooler. I put a bolt in and wrapped masking tape around the piece to hold the epoxy. After letting it set for about an hour, I would turn the bolt so I didn't glue it in. I did this a few times while the epoxy was still soft. When I checked it this morning, I got the bolt loose pretty easy but amazingly the masking tape came right off and wasn't glued to the epoxy. The masking tape was still sticky too! It's still slightly soft but they say to give 24 hours for full cure. It seems to be stuck to the cast piece OK.

  5. #5
    Elite Member Shield Arc's Avatar
    Join Date
    Jan 2009
    Posts
    4,134
    Location
    Figuring the picking points of jelly donuts.
    Tractor
    John Deere, 4200

    Default Re: Cast iron repair update..

    What brand and part number of epoxy did you use? Every once in a great while I need some epoxy, only two places around here that would carry an industrial epoxy would be Fastenal and Tacoma Screw. I wouldn't think ACE Hardware would have anything industrial!


    Miller Dynasty 300.
    Lincoln V350-Pro w/pulse.
    Lincoln LF-72 wire feeder.
    Lincoln SG Spool gun.

    Lincoln LN-25.
    1937 IdealArc-300.
    Everlast PowerArc 200.
    Everlast PowerArc 300.
    3 Lincoln SA-200s.
    1800 Ellis saw.
    Hypertherm Powermax 1250, CNC table.
    PROFAX Welding Positioner.
    JD2 model 3.

  6. #6
    Veteran Member
    Join Date
    Mar 2013
    Posts
    1,402
    Location
    Edmonton, Alberta
    Tractor
    MF 135

    Default Re: Cast iron repair update..

    I just used the original JB weld cause you can buy it in a small package. I've had good luck with it in the past. Everything has to be real clean and you have let it set for 24 hours. Devcon makes some real good epoxy too.

  7. #7
    Veteran Member
    Join Date
    Aug 2004
    Posts
    1,719
    Location
    Caldwell Co. NC
    Tractor
    2006 Kama554; 92 Belarus 250AS

    Default Re: Cast iron repair update..

    2006 Kama 554, 92 Belarus 250AS, Bombardier Outlander Max 400.

  8. #8
    Veteran Member
    Join Date
    Mar 2013
    Posts
    1,402
    Location
    Edmonton, Alberta
    Tractor
    MF 135

    Default Re: Cast iron repair update..

    For what I was doing, I needed a liquid epoxy.

Similar Threads

  1. Cast iron repair?
    By Arc weld in forum Welding
    Replies: 38
    Last Post: 05-03-2013, 12:56 AM
  2. "No-PreHeat" Cast Iron Repair Technique
    By ChuckE2009 in forum Welding
    Replies: 5
    Last Post: 03-21-2013, 12:38 AM
  3. Cast Iron repair, my education!
    By Shield Arc in forum Welding
    Replies: 26
    Last Post: 12-08-2012, 06:22 AM
  4. Cast Iron Repair
    By Shield Arc in forum Welding
    Replies: 12
    Last Post: 11-10-2011, 09:28 PM
  5. cast alum vs cast iron
    By fluffyone in forum Kubota Owning/Operating
    Replies: 8
    Last Post: 02-11-2004, 08:55 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
  •  
© 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.