Page 1 of 2 12 LastLast
Results 1 to 10 of 15
  1. #1

    Default Tiller repair help

    I need some advice on repairing my tiller. I just received my NH TC18 and the guy "threw-in" a Howard 48'' used tiller with it for next to nothing, as-is. Well, I was using it in the garden and all of a sudden, the tiller gearbox starting jumping all over the place. What happened is, all but one of the four bolts that mount the gearbox were missing and the one that was there, snapped off. I removed the gearbox tonight and drilled and tapped the three remaining holes. The snapped off bolt will not come out with an easy-out, as it's an extremely hard bolt. My question is, when I get it all back together with the three mounting bolts, should I weld the darn gearbox right to the frame? The tiller has probably a few good years left in it if everything goes right. Would welding it in place hurt anything? I will still be able to remove the side cover of the gearbox for servicing, I just won't be able to remove the gearbox itself. What do you all think?
    Thank you,
    Dave

  2. #2
    Veteran Member
    Join Date
    Feb 2002
    Posts
    1,055
    Location
    WVa
    Tractor
    Kubota L3710, Ford 5600, Case MB4/94, Kubota B6200

    Default Re: Tiller repair help

    I'd take it to a machine shop and let them get the bolt out. If nothing else a shop with an EDM machine can destroy the bolt in place without damaging the gear box. Try to get a guaranteed cost up front. When you reinstall the gearbox use grade 8 bolts and use loctite on the threads. You get a lot of shock and vibration operating a tiller. That may have started the problem.

    While you're working on the tiller check out everything. Howard makes a good unit. If it's repaired properly, you may never need another tiller.

  3. #3
    Elite Member
    Join Date
    Feb 2002
    Posts
    3,778
    Location
    western,pa.
    Tractor
    Kioti DK 35

    Default Re: Tiller repair help

    Can you drill the rest of the bolt out and retap the threads ?

  4. #4
    Veteran Member
    Approved Advertiser
    HayDR's Avatar
    Join Date
    Oct 2002
    Posts
    1,864
    Location
    Johnson City, TN
    Tractor
    JD 2040,2240, 2355, 2755, 4055

    Default Re: Tiller repair help

    I really do not like saying this but Weld it and use it up.

  5. #5

    Join Date
    Jun 2002
    Posts
    873
    Location
    N Central Ohio
    Tractor
    NH TC35D/SUPER H&M/F-20/JD B&D/FORDSON/JD250 SSL

    Default Re: Tiller repair help

    Are u handy w/ a welder?
    Take a smaller nut and set on top of broken off bolt.
    Take a small (3/32 or 1/8) rod and weld thru hole in nut to the top of broken bolt.
    U can wrap a piece of paper around the rod to keep it from striking on the side of nut.
    The heat of welding the nut on will also loosen the bolt some.

  6. #6
    Elite Member 5030's Avatar
    Join Date
    Feb 2003
    Posts
    4,879
    Location
    Michigan, S.E. Monroe County
    Tractor
    Kubota M9000 Hyd shuttle/Massey 1085

    Default Re: Tiller repair help

    You can drill the broken bolt out using a Malford Tool Co. Hi-Roc solid carbide drill bit. You can buy individual ones from Enco-- www.usenco.com. It's a lot cheaper than using an EDM (diesinker). I own a machine shop and we drill dies all the time with these drills to remove broken bolts, etc. Or you can weld it and run it till it pukes. The problem with welding is that the gearbox is probably cast, versus the structual frame. It will be hard to get a good bond between the two and you might destroy the gearbox.

  7. #7
    Elite Member hazmat's Avatar
    Join Date
    Feb 2002
    Posts
    4,015
    Location
    West Newbury, MA & Harrison, ME
    Tractor
    Kubota B3030 loaded!

    Default Re: Tiller repair help

    <font color="blue"> The problem with welding is that the gearbox is probably cast, versus the structual frame. It will be hard to get a good bond between the two and you might destroy the gearbox. </font>

    Even worse, the gearbox could be cast aluminum vs the tiller which is likely steel. It aint easy (near impossible) to weld aluminum to steel.

    The Howard tiller isn't a throw away. Fix it right &amp; enjoy it for years to come. Even if you have to throw a couple hundred bucks at it, you'd have paid $1,500 + for a new one. Around here (Mass / NH) you can get machine shop labor at about $50 an hour. Don't suspect it would be any more expensive than that in the Finger Lakes.

    Suggest getting in touch with the manufacturer Howard Rotovator They should be able to send you an owners manual and offer advice as to what else to check over on the machine.

    Good luck &amp; happy gardening


  8. #8
    Elite Member 5030's Avatar
    Join Date
    Feb 2003
    Posts
    4,879
    Location
    Michigan, S.E. Monroe County
    Tractor
    Kubota M9000 Hyd shuttle/Massey 1085

    Default Re: Tiller repair help

    Hazmat:

    Seeing as I am still in front of the computer, I looked up the cost of Hi-Roc drills. 1/4"- $12.29, 1/2" - $21.17 with sizes in between. I'd drill the bolt and threads out going to the major diameter of the thread. Then re-tap the hole the next larger size. I'm sure that there is enough material in the casting to do that. Hi-Roc's are really neat, you can drill glass with them.

    With Hi-Roc's, you need plenty of coolant at all times as well as a steady pressure on the drill. They work really well in a hand drill motor. I have a friend who is a diesel mechanic and he regularly drills out exhaust studs on Caterpillar engines. Seems as though Cat's are prone to breaking exhaust studs and the studs become brittle with the heat and cool cycles of the engine. He would go through HSS bits like water so I got him a couple of Hi-Roc's. What a happy camper. Remember though, you have to sharpen carbide on a silicon (green) wheel, a regular grinding wheel will not work.

  9. #9
    Elite Member hazmat's Avatar
    Join Date
    Feb 2002
    Posts
    4,015
    Location
    West Newbury, MA & Harrison, ME
    Tractor
    Kubota B3030 loaded!

    Default Re: Tiller repair help

    Not bad prices. I assume that they work better in a drill press than a hand drill? He should be able to get the gearbox in a drill press.

  10. #10
    Elite Member 5030's Avatar
    Join Date
    Feb 2003
    Posts
    4,879
    Location
    Michigan, S.E. Monroe County
    Tractor
    Kubota M9000 Hyd shuttle/Massey 1085

    Default Re: Tiller repair help

    They do work better in a drill press, but a hand drill motor works too. You just have to keep the bore flooded with coolant, be it oil or a water based coolant. I use Valenite VT700 synthetic in my machines so if I use one in a hand drill, I put some in a spritzer bottle and use that to keep the bit lubricated.

Page 1 of 2 12 LastLast

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.