When I grew up in my home town,street machines in Windsor Ontario Canada,were some if the fastest cars in Canada! One day a fella pulled in the drive of a friend's house,his 1970 Chevrolet was running very rough, so he parked it and shut it off,he tried to start it again,but it misfired,that's when his suspicions came true ,he had broke either the Crankshaft or camshaft street racing! Another thing that I know of,is one day my mother came to where I worked after driving 240 miles,she said something was wrong with our 1972 Buick. I cranked it over and I could hear a noise coming from near the transmission. So,I pulled thr engine out at work,then inspected the flywheel,it had cracked around the bolts,in a triangular pattern,with a very unique twist to it,each break,acted like an interlocking puzzle,some of the metal had formed a tapered edge going in an angle on all 3 sides preventing the flywheel from becoming part if the bellhousing or falling away from the crankshaft, so it stayed in place till she got to my work! God had his hand in this,although the car might have kept running,if she had shut it off if the flywheel has completely separated,I know it wouldn't have started ,as the ring gear is on the flywheel,which in an automatic,is just a thin steel disc,with gears!
It's funny: usually I can understand Marty just fine when he's narrating, but when he's conversing with a fellow Kiwi, it just sounds like Tim "The Toolman" Taylor to me. Marty: "Grunt?" Friend: "Grunt." 😄
mumbling is kind of our thing. Foreign wifey gets annoyed and says things like "E-NUN-CI-ATE" but I swap words like draught for giraffe and see if she notices
Being the fix everything guy no we dont because theres never ending supply of people that want help for free but always have excuses when you ask for help in return
He's the guy who taught me so much about electronics, plc's and rewiring stators and has lent me that digger. I drop everything when he needs a hand ;)
@@MartyT its a 2 way streak thats good thats what i enjoy its the other 99% of people that just keep asking and never do anything for you that makes me not help anyone anymore
It sounds worse than it is. You can have a normal conversation just two meters away from the machine, and I don't even have my engine under a hood. It's a very distinct sound though, and pretty harsh, so I wouldn't recommend anyone running this without hearing protection for a prolonged period.
@@martinedelius yes the air cooled diesel sound is as distinctive as the Beetle and 911 air cooled engines (but not nearly as much fun) . I *strongly* recommend noise cancelling hearing protection if you sit on one all day like I often do!
@@langdons2848 I have pretty much the same motor they just put in this machine in a skid steer. It's unbearably loud.. like wearing ear protection still hurts.. if I put a new muffler on it would it be worth it? Thanks!
I thought I was watching Pakistani Trucks at first working on the dirt but then I saw real tools, brand new engine and the oil being collected :-). I had hoped that Marty had a lathe hidden away and would bust out the welding kit.
I checked in for hip replacement surgery at 9 am and was released at 4pm and it's now 2:16 am and I checked my phone that I glued a magnet to so I can work on my projects and watch Marty. Just got the old horizontally opposed Briggs running for my rear engine hot rod Ariens single blade project. That surgeon must be your long lost brother cause I feel great and can walk again. Rambling over and out.
@@tihspidtherekciltilc5469 I d be amazed if you up and about in less than a week , buddy had a total with a mis , was on a morphine pump for couple days then off to rehab for a while . Glad your tolerating it so well.
I love this guy's use of the understatement! "That's not looking great" as half the engine flywheel shakes like a palm tree in the wind! If he was on the Titanic he would have said, "That's not looking great" as the water flooded over Captain Smith on the bridge!
If you remove the small decompression spring inside the new engine, it will run almost by touching the key. did it to mine after having to replace the starter nose bushing a year after purchase. never regretted it👌
That looks just liker the "mini-digger" that you used to dig out that french drain alongside the garage of new new homestead several months ago... good thing your friend knew who to contact when he needed help getting it fixed!
What a sweet old guy, good job helping him Marty! He's got the hands of a hard working man and definitely knows his way around an engine, I bet 10-15 years ago you'd been struggling to keep up with him at this kind of job 😄
It's great to watch you both work at the some time, not a lot of chatter - It looks like a 4-armed man is working on it. That's a rare set of chums who can anticipate the steps of a project and watch out for each others' need for a hand here, a bump there - I've only had one or two people I could work with like that, and it is a delight.
Fillet not properly rolled is the major stress raiser and source of the crack. Once started they just work their way across. Cost cutting in manufacture just turned with the pin but no rolling or grinding of the fillet afterwards, probably not even peened. Normal.
@@DieselRamcharger I have a similar machine with the same Koop engine. It has a *3 year* warranty. So far I have had a new starter motor, quick hitch (due to manufacturing defect), and bucket ram (damaged when the quick hitch let go) on warranty from the dealer - no questions asked. Yes there are quality issues, but the Chinese manufacturers are learning and improving - and with a three year warranty I am very comfortable. I'll turn the machine over when the warranty expires and pick up a new one. And the purchase price is vastly lower than any of the big name brands. For *me* and my needs, it's compelling.
👍 that's what friends are for. BTW, with a new crankshaft and associated goodies, I rebuilt a 1200cc VW engine with a 'broken in half crank'. Boy did it run with a weird clanking sound.
Wow those engines are expensive where you are!! I have the same machine with that engine in, I bought it with a blown engine because he ran it low on oil and it seized up, I replaced it with a yanmar L100 which had a keyway shaft. I use it as a spare if the kubota is busy.Great vid as usual 👍
I was really confused about the scale of the machine right until he was operating it at the end! I was thinking that was an incredibly tiny engine for most of the "mini excavators" that I see around, you know, the types with a full (albeit tiny) cab.
You may need to assist your friend in changing the oil a little more often, replacing engines gets a little expensive. Glad he could call on his “mate” to help him out.
I admire all who can work on machinery or anything out in the field. I would have to have that digger in my workshop, powerwashed, and on the lift, with my tool cart close, and me wearing barrier cream and gloves.
I'm used to work in the field - In the snow, 10 below zero, usually in the dark with a headlamp on... I can assure anyone that you will finish the job in record time! :)
During the 70s Norton had issues with crank failures, racer's in the know polished the roughly machined oil passages thru the crank...internal stress risers.
Im sure if you guys add the time to search the store via the news paper or TV news im betting you will find out . Maybe Marty or the other guy don't want to get into the shitstorm of gosup . Just my thoughts. Cary on .👍🏻✌
I love this little digger, thank you for helping out! If I recall properly you did mention a clanking when you had borrowed it. I’m glad you were able to get a new engine. Thank you for the upload! 👍🏼❤️
Sometimes there just nothing to it but to replace the engine, if you had rebuilt the old one there was just too much damage to the frame you'd have nothing but problems with it. Great video Marty, thumbs up.
Top man Marty , unconditional help to a friend or family , EXACTLY RIGHT . Done it many times for others over the years myself when they were struggling . Total respect mate . Keep up the excellent work and content . See you in the next one . Keep them coming .
I have a similar machine with the Koop engine. And it's great. I get over a full day's work out of a 10 litre jerry can of diesel, so it's pretty economical for the amount of work it can do in that time.
Another job well done. Can't believe how much damage was going on in the old one 😳. Thanks again for your time and videos. Enjoy the rest of your week.
You can definitely tell there's a noise improvement once you put that putty on the manifold. You gotta love those easy fix line with the filter. So satisfying watching you grate the road with it also. Really enjoying watching your videos. Cheers 🇦🇺
I'd like to know how many hours are on the motor,before it started to croak! And is it a deisel? Goes to show you,these little engines aren't designed to run a mini excavator! Should be two piston deisel!
Great video, thanks mate, I just watched couple days ago you using his mini digger and looked a good machine was wondering about reliability. Then this popped up a couple days later! Lol 😅🤦🏻.. Great short but good detailed video as usual. That's what proper friends are for in my book mate! How I live my life also, helping others whenever I can, but unfortunately there's not many of us left nowadays mate! Too many people just out for themselves (unless they you can get something out of it!) -At least here in England, now not like the old days! Or how I was brought up! Thanks for restoring a bit of faith in humanity! And for another bit of USEFUL information to stick in the memory bank lol.. Cheers from London England 👍😎🏴🙏
With the substantial cross section of that crankshaft I think you are spot on from my armchair there doesn't seem evidence of fatigue and given that it is just turning the hydraulic pump (almost constant load) there doesn't seem the mechanism for sudden shock. It was a failure waiting to happen. The replacement power unit dropped in just like a bought one. Great job.
Guess stress concentration on a sharp corner that started a crack. Once the crack is there, it will propagate over time, even with little load until it snaps apart. That shell pattern shows a bit how the crack went along.
There is a HUGE cyclic load between the crankpin and the flywheel every time the cylinder fires, even at net zero crank torque! On a single cylinder diesel, the cylinder pressure is very high and the rate of pressure rise high (which is why diesels (and modern DI petrols) sound so "knocky" in fact) resulting in huge torsionjal vibrations. Look at the size and inertia of the flywheel, it's massive to damp those individual firing pulses out to try to get a smooth output speed and torque. On this engine, the flywheel is on the other side of the crankpin, so working loads also go through the pin to flywheel joint as well.
The "sudden shock" is every time the engine comes up on compression, then combusts. If that is a cast iron crank, I would say there is the problem. A forged steel crank would do much better service, as long as it had proper radii in the corners.
Its a joy to see you guys fix this machine. I am really impressed with the digger, tiny and simple with zero electronics and if it needs a new engine every couple of thousand hours for most domestic users they would never wear one out. They are so cheap to buy it doesn't matter if you don't use it every day but great to have if you need one. Of course it not a Cat or Kubota but then it runs at a quarter of the price and mostly does the same job. Well done for getting stuck in.
these diggers are not so cheap when you see what goes into them , thats a 10 hp cloned yanmar engine engine , single cylinder, on brand mane machines its normally a yanmar engine 2 or 3 cylinder for the cat micros producing 16 hp, you get for what you pay eufortunately
Hi Marty, I have the same engine on my Generator, still going strong after 15 years. Came with spare piston rings and big end shells. Driving a HPU is not friendly to the engine, constant shock loading, a resilient coupling would be the way to go but you have space constraints.
How many people do you know that get to trouble shoot a motor issue for Sean Connery! Lucky guy. Those little ridges in the fracture surface are fatigue striations. Referencing the view at 5:48, it looks like the fracture started at the bottom and as the fracture moved up it beat the lower part smooth. Then when it got to the top it was catastrophic.
👍👌👏 Very well done again and as always. It's always great to see good friends working together respectively helping each other. Best regards, luck and health to all of you.
There's something about hearing "There's your problem" when they're looking at a crank that's snapped in half that removes all confidence in the mechanic for about 3 seconds until you realize they were joking. Hopefully. 🙊🔧
Job well done Marty and great friend. Though you should have dished out a lil more cash and went with a Kubota. Just my opinion. Glad to see you operating again.
I bought my son a 72 Dodge Charger that he put a lot miles on to college and work everyday for a couple of years. Then he was driving to work in Orlando Florida 30 miles one way. One night he was late coming home so I asked him what happened. He said his car was using about a quart of oil a day and was now making a noise and vibration. I went to check it out and when he cranked it up, I knew it needed internal fixing. The machine shop showed me the broken crank. I couldn't believe he had driven it home 30 miles on the interstate highway (65 mph speed limit) and no one rear ended him since he was going so slow. I fixed the engine and my second son drove it afterwards for a couple of years. Tough 8 cylinder.
Hi guys good job looks like you’ve got it back together again okay great little machine keep up the hard work love the videos Cliff from Logan City Queensland Australia
The engine mounts seem to be bad, it may even be the reason that counter balance broke off. Massive engine vibration from bad mounts can cause internal damages, the counter balance contacts the inner engine cover from those vibrations.
@@resto_roller That's just how they sound. I have this exact engine on my microdigger. I do have to replace the mounts though as they are worn so good call on that.
Yup, an earlier video (stump removal vid) showed significant vibration - the engine was rocking so much you'd think a closer inspection would have been done. Instead, they just ignored it.
I had the same Chinese clone engine on a water pump fell on its side oil pump stopped pumping and it spun the crank bearing I scored a yanmar crank on trademe put it all back togeather lining up the dots on the gears fitted a new bearing 4 years later its on my water blaster now fantastic really nice ballanced engine now put that down to the yanmar crank.
I cheered when I saw the new engine. Sometimes, you just have to jack up the radiator cap and drop a new machine under it! Good call. I know in my heart you could have fixed the old one. But, let's just say I have paid more a new VCR, and that was money well spent on future labor that will not be needed. Time is money. You ROCK!
Years ago, a neighbor had an M Farmall develop a "noise". He had just started corn picking for the year and finished, using that tractor to haul loads up from the field. That winter he and his son tore the engine down and found the crankshaft broke in two, similar to this one.
Here in North Wales we have Welsh - speaking farmers who with a sledgehammer, mole grips, shovel and a roll of blue rope can fix literally anything, and I mean anything! Have you got any Welsh in you, Marty?
