You guys have been a font of knowledge, I got the motor out of the T140, checked a bunch of stuff, repaired the oil pan, ended up doing a repair on the alternator bracket pivot(someone in the past messed it up, I fabricated a new bracket setup that transferred the load off the damaged mount onto the new steel bracket), motor is running like a champ, replaced a drive motor that was bad also. I took a couple pics, I'll post when I figure out how.....but I digress..... The T140 came back with the bucket hanging off, broken center piston, you know the drill. The main pivots on the bobtach came out, or, 1 did, snapped the taper pin. I've disassembled, and the tapers in the boom are good, but the pockets(?) on the bobtach itself are shot. I've ordered all the new parts needed(about 400 bucks) It appears the old ones need to be cut out, then the new ones inserted, lined up, and rewelded. I can do this, but has anyone done a write up, possibly with pics. Any tips? Any help is appreciated. Boss is on me on this, the machine is being retired and sold off. Getting a new T455 to play with.
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Skidroe is spot on, i have done it before too.
If you have a friend with a lathe and knows how to use it, they can make new bosses for you if you can't get the weld in ones from Bobcat.
I too used the pins to line it up on the machine, just be careful to go slowly with the welding or else it will distort and bind up. Make sure you weld opposite sides to try and keep it straight.
The hardest part i found was cutting the old ones out. A plasma cutter and grinder got the job done, but it did take a few hours.
Got all the parts in today, new bushing, new sleeves. Unfortunately I've run out of oxy/acetyline, should be delivered today, then cutting will begin. I'm pretty skilled with a torch, but this job is going to test those skills, looks like its tight in there.
I chopped mine up with a plasma, burning grease blown everywhere.
Good luck, hopefully you can get a few picutres along the way.
I took a couple pics, got the new ones in, unfortunately, while I had arranged to borrow a 220V mig welder, that deal didn't happen, so I arc welded it in, not as pretty, but the unit is up and running. Lining them up was tricky, but once I was happy with the location I tacked them in place with my little Hobart 140, broke it all down and went at it with the stick welder. Cleaned the taper pin threads, the bolts, the taper pockets, hit everything with some thread-locker, so now I can say bye bye to this one.
Personally, i trust stick welds more for high strength joints. It may just be my mig welding though
I MIG better than I Stick weld. I was taught in a fabrication shop, so most of our stuff was either MIG or TIG work. We used a stick welder occasionally. My little Hobart 140 gets pushed to it's limits sometimes. I really need a 220 MIG. Of course, if I get a 220 Mig, I'd have to get a TIG conversion for the delicate stuff. The Hobart doesn't lend itself to that conversion easily. Ok, I admit it, I'm a tool whore.......Personally, i trust stick welds more for high strength joints. It may just be my mig welding though
On a related note, the new Bobcat 455 is scheduled to be delivered today, and the Takeuchi skid steer is on order. 2 new machine to learn.....it never ends.....I MIG better than I Stick weld. I was taught in a fabrication shop, so most of our stuff was either MIG or TIG work. We used a stick welder occasionally. My little Hobart 140 gets pushed to it's limits sometimes. I really need a 220 MIG. Of course, if I get a 220 Mig, I'd have to get a TIG conversion for the delicate stuff. The Hobart doesn't lend itself to that conversion easily. Ok, I admit it, I'm a tool whore.......
I was never taught what to do, i learnt from zapping away and burning myself far too often.
My dad arranged my first MIG welder a good 20 years ago now. I used it a little bit, but i didn't get the results i wanted so it sat for a probably 5 years without much use at all. My dad used to pester me as to why don't i use it more? The steel he used to get was always rusty or had paint on it, which we all know MIG welders really don't do well with. At the time, i didn't know this was the cause as my stick welder would weld anything, paint rust, it didn't care.
Fast forward to when i worked out hitting the part to be welded with a grinder first would fix all the issues, i reach for the MIG more often than the stick welder.
The extra amps is needed for thicker steel, i have a 250A one, it does everything i need so far.
As for TIG, i have yet to master that, i want to get an AC one to try welding aluminium.
TIG rocks!..... That being said, it has it's specific uses. My boss, years ago, would have us make cubes out of 1/16 aluminum, finish them and he'd put them on his desk. When prospective clients would ask about weld quality, he'd pick one up and toss the "heavy" block to them......
hehe i like that
I'll need to keep an eye out for a well priced AC tig, one day i'll get one i'm sure.
