I think that is a most impressive series of tasks completed very well and, in my view, quickly. I dread to think what the bill would have been if you had asked the dealer to carryout the repair! I'm amazed that he could carryout such repairs in the field, literally.
That's a lot of tools and skill for $2500 and the amount of work he did. The last machine shop i worked for got abou $500 per bushing to remove and replace back to factory bore. That guys is a real artist!
An easier way to put the bushing in place is to drop the bushing in liquid nitrogen. It will shrink the bushing enough to where it will slides in place and then it expand as it warms back up. i use to work in a landing gear repair shop and thats how we would put a repaired landing gear axels back into 767 and 757 landing gear. Nice repair for sure.
$2500.00 was a real bargain, that bill could have easily been double or 3 times that. I'm a retired machinist and have great respect for what he did out in the field. I never seen equipment like that before. Did everything go together as planned? The sound of the bearing being pressed in told me the interference was too much, hence the out of round bushing. I am impressed with his skills and he needs to charge more.
Glad you have the same problem with the bushings.I thought it was just me.Where do i buy a heavy duty reamer/ honer from.Really intresting video .Glad you bored then all out properly.Top work !!!
Well, That is partially true. It was being transferred from some place in Ohio to Morton where it would come on the regular truck to our dealer. The upgraded oversize pin and bushings was in Morton.
He'll you got a barging there not many like him around does not RU-vid himself he is a journeyman does damn good work and knows his sheet seems like a good man
no problem paying bills when you know you pay for good work and not for people drinking coffee on your time. a buddy of mine once broke his wristwatch when banging his fist in the desk at the dealer after once again they had broke his truck more whe trying to fix it.
Used to put those bushing in, no press required, liquid nitrogen. No stress. This is an OK field repair but not what we did in the mining industry. We would have machined new ears, cut the old ones off welded on the new, lined bored and replaced the bushings. Probably would have cost 5K or better the way we did it. But when your in the field you do what you gotta do to get er running again.
That's not a reamer, it's a Hone.. You can Chrome plate the Bore of the new Dog bones, You mentioned .015 difference in the hole size.. You can hone it after Chrome, but, you can't bore it after that. Chrome is too hard. I like the Welder's Trailer, It's very similar to a Military Machinist trailer.. Up here in CT, That Job would have cost $4 - 5 K
That's actually super reasonable for that job. Where are you located? Here in Philadelphia, you'd probably have to pay twice that to get the same job done.
Very cool video ! I'm curious what the satellite dish was for on his welding trailer ? i didn't see a t.v. ,but I guess that doesn't mean it wasn't there :)
I don't do line boring but I do some similar work in a lower income area and I charge 65$ an hour so he's definitely under charging... He needs to be at least 80$ but... When you do good work and your prices right and your overhead is low enough you can get the work
6:45 The bushings "crushed" ? No they warped out to egg shape. Between 8 to 13 thousands LMAO. Super cool the bearing sleeves in dry ice for 3 hours and push into sockets LOL
Maybe for GPS, so order runners can find him if he is in the middle of nowhere when he orders parts. Maybe for tv when he stays overnight when far from home
I talked with the man and the area over the goose neck is a bed and the dish is for his TV. That's the way he can stay on sight working 12 to 14 hours a day. Not for me.
Hey, I have a question for you about a 1985 cat 235 serial prefix 64r... Having a hell of a time trying to locate or even name a part in the final drive. Any chance you could help? I have photos of the part in question. Thanks!
$2553.00? I was thinking around $4000.00-4500.00 for everything I saw being done. Question: i noticed a satellite dish on his trailer, what's he use that for? Internet or entertainment?
Charlie, I know you can’t film on your big jobs per legal. But dang make a simple video once in a while when you’re in the shop or something, miss watching these, very few post this kind of content.
He is making sure it is correct size for the pin, sometimes the bushings "shrink" after being pressed in. Evidently his did, that is why you see him honing / reaming it out later.
I remember watching this video several years ag and wondering why a machinist would have to hone a BEARING after boring the holes to the correct size. I am 68 years old and have been working in this same field for 47 years. Using a self made set up
I get very accurate results. Also use a spring caliper with a 1 1/4” diameter adjusting nut which I measure with an outside micrometer without removing the boring bar. If I mike a 100 mm BEARING AND IT MIKES 8 thousandths over then that is how much press the hole should have on the BEARING SO THE HOLE SHOULD BE 3.937” or 100 mm all way through. If the hole is a couple of thousandths small, out of round or tapered then the hole should be honed true not the BEARING. And use SPRAY ON brand anti seize in the hole.
Anthony Edwards no grease clearance on the bucket ears , the pin doesn’t rotate inside these. If I remember he wants 0.001”/0.003” clearance to keep from pin wollering in the bucket ears. This machine has dug 300,000 yards of dirt here and there is no pin play or side play between stick and bucket. The proof as they say is in the pudding.
Well hate to be a critic Charlie, but that guy had the bore tapered that is why he was honing it out. I used to be a welder and machinist for Butler Machinery ( Caterpillar) in North Dakota I would never have done that. If you know what you are doing and everything is straight and true I was always less than a .0005 off my target bore size. Unless it was Caterpillars fault and had a screwed up bearing. ( I only sent one back to the plant in Peoria once I measured every one before installation) If that guy was a better machinist he would not have had to do the honing there a pin will clear with .001 pin bores aren't real critical like the ones on your dog bones but he is right there excess wear is a waste of putting a new pin in except when installed with bearings like what he pressed in he installed those really tight. How I know is I have spec'd out bores and pulled hundreds of bearing in .Cat specs them that tight on the boom and stick (.014) under bearing size is the tightest iv ever done never the bucket like he did that popping is tight taper in a bore which u don't want. This result in the bearing walking out of the bore prematurely 80hrs of Caterpillar failure analysis proved this to me its not bs. I was there machinist for many years and would be glad to inform you of whatever I'm a fan of yours that bearing should have been a .008 press max. Why this bore was tapered even I can tell you lack of bearings on his line boring bar number one and also did he cut the spreader bar he had welded on below after he welded the bores. If not that will definitely screw you every time cause the heat moves the ears also surface finish is major critical on bearings walking out of a bore.
He said, that he pushed the bearings in and fitted them on the buckets? He did 2 buckets and had to hone both of them. He also told me he would have to hone them before he started. When he got done you could not push the pin through but you could bump it through. "not pound". He does all of Cats , Volvo's , Deere's and most other Dealers around here. Only cat does some of there own if they can not get him. all the pins that rotated in bushings fit fine. the bore he welded in the end of the boom where the stick meets was the same. You could not push the pin but you could bump it with your palm and it would go through. It may have had been tight but it was better than it was before LOL. it had a woe in it...It was woe out ha ha ha!
Wyatt, lots of good info and it sounds like you know what your talking about. I have been reading a lot and have tried to find a good rule of thumb on what size to under cut your bore in order to have a press fit. I have been going with about .001 per inch of diameter. Does this sound about right? (Its been working for me)
Doug you must not have a very good bearing set up or a good boaring bar because it would not have the spring to it and would cut a hell of a lot truer get climax bearings and 2" bar then you will not get much chatter and flex in your bar I also add bearings as close as I can get I kow it is a long span on excavators between them.
Robbie Taber The factory bearings have the press fit made I on them. If it measures .008 over the inch or metric size then they want .008 press so bore the hole to standard size.
For what you got done that is pretty cheap and you didn't have to truck the machine anywhere. So with all your pins and new bushings total job come out to 5000 dollars.
Was a nice bit of kit. My dad was a tool and die maker and there was nothing like that in his tool box. Now he didn't set foot very far outside of a machine shop. The jig holding the boring bar would have made him cringe.
That drill he is using for the reamer is real old school, low rpm, alloy case, dont try to get a new one these days, well not without paying an arm and a leg for it.
1st Tell your guy bushing a bucket is the worst, build it up solid and bore to finish. 2nd buy a bore welder, I've heard all the bullshit about people that can weld faster by hand, they are wrong. You get superior welds with a bore welder and never a low spot. 3rd buy a climax line boring setup I own 2 of them my cutting rate is twice as fast as I'm doing all my cuts in 2 passes only, rough and finish. 4th the easiest way to install a bushing is to freeze it in liquid nitrogen then let it swell into the bore. It's good for a .003 interference fit and with it swelling your good for about an 80 ton bushing lock.
Yes in some of the 200 series they did that so they cold move buckets to different machines but have since stopped doing it on the 300 series. Cat now recommends solid bores .
