Prevost bus has tire wear issues. Clunk in the front end, kingpin shim issue, bearings Bodega Cooler
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- Опубліковано 5 жов 2024
- The worst tire wear i have ever seen! A clunk in the front end leads to several discoveries on this bus. Wheel studs too short. Worn bearings and races, kingpin shims worn out and more.
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I told a guy at a tire shop about the short studs on my 4104 and he said “it didn’t matter as long as a few threads were covered.” I think I’ll go to a different shop. And yes I already replaced the studs with longer ones.
That is correct. If you have a couple threads show, having many threads show does not mean you have more "safety."
I'm constantly reminded of the importance of a thorough pre-purchase inspection by a competent expert not involved in the deal.
Another great video Scott!
After watching a few years of these videos I am convinced that a used bus purchase will expect to need the following replaced or serviced:
Wheel bearings
Wheel seals
King Pins
Radius Arm Bushings
Air Brake Canisters
Air Bags
Brake shoes/discs
Leveling Valves
Air Hoses
and this is before we get to engine and transmission issues.
If you buy one of these, you better have deep pockets to keep them running safe.
A good friend of mine last year purchased a 1998 Prevost. First thing he had to do was put $8,000 worth of new tires on it. A couple of weeks later it died on the road due to a battery charging problem. Was down at a dealer for multiple weeks waiting on parts.
Too bad he wasn't a patron supporter of yours where he could go to you for a reliable assessment of the vehicle's needs and quality workmanship. Thank you for bringing these videos to us.
Add to that wallowed out wheel stud holes, and worn out lug nuts and stripped or stretched studs.
These are 20, almost 30 year old coaches. One can find entertainer conversions of the Le Mirage with 800k miles or more for under $250k. After watching what Scott and Jonathan have been fixing on the Prevost chassis that have made it up the hill, putting back another $30k-$40k for these kinds of repairs would seem prudent. At this level "damn, what was that" starts at $5k, "oops" is $10k and "oh shi..." is $20k.
The amount of rust and corrosion under some of these buses in the US is incredible. I realize its because when it snows, they put salt on the roads but it really does some damage. Its a worry how often wheel studs are stripped and damaged too and bearings are often chewed up. I guess its easy to put off maintenance when you need $10-20k for a service.
If I'm the owner of this bus, I'd be thankful that I didn't get into an accident due to all the wear in these crucial components. I began my auto technician career in air cooled VW's. When I would begin to describe the amount of wear and damage, many would freak out. I can only imagine with these heavy vehicles how bad they can wear out. Great video.
As owner of this conversion you'll get to enjoy new careers as plumber, electrician, HVAC / generator and maybe Aquahot tech. You'll never stop learning!
Yeah, well, think about your average gravel yard truck driving down the road with 300k miles.
Scott
The clunking and sudden pulling of the steering to one side sounds exactly what happened on my 1994 Wanderlodge.
Took it to a large and well respected truck shop and they were unable to diagnose the problem. On very hard emergency braking the coach would violently pull to one side. Turned out to be the brake rollers on one side were stuck and not freely riding along the S-cam until enough force was applied to force the roller along the cam and actuate the brakes on that side, causing the pulling! At a rally I met a guy who was the fleet service manager for a large bus transit shop. He said this is common on coaches that don't get their brakes serviced frequently such as RV's. I applied brake grease on the roller edges, not the surface that contacts the S-cam, and solved the problem! Hope this helps somebody!
The great Prevost Dragonfly massacree...
Sounds like an Arlo Guthrie tune.
Scott, you guys do excellent work! Thanks from all of us who share the roads!
It's concerning how many brake springs you find that are in backwards and heavily worn as a result.
That was some crazy tire wear, just one more heavy braking and it would have exploded.
I wonder when Tiger tools will come out with a brake lever clevis pin press. Like a mini ball joint press to avoid spreading the clevis yoke to almost the breaking point. Or a clevis pin socket that slips on and a replaceable pin is inserted and a 3/8 impact to spin the socket and pin.
Owner. It's such a great unit, we drove it for 900,000 miles and never spent a cent on it. BGM. RIGHHHHHT.
I love seeing your 'persuasion' techniques at work. I feel like I share the joy when the part/fastener/coupler *finally* comes free! Nice job on the edits and pacing, it keeps getting better. 👍
King pins! Always a pain in the ass. You know who ever put them steer tires on before used lug nut covers to hide the short wheel studs I bet lol. I never use em on steer tires cause as a driver you need to see them studs everyday for proper pre/post trip. Ya know? safety.......GREAT VIDEO!!!1
I find it amazing how many wheel bearings are toast when you look at them. It's also unnerving that most of these busses were in commercial service at some point and the parts required to make them safe is alarming. Thanks for doing great work to both of you. First time I've been first!
Nothing stronger than rust. And heat is always your best friend. Always hated king pins I worked on school buses and my fair share of them frozen.
As soon as those lugnut covers were pulled , I thought the lugs were a tad short.
Thank you so much for doing these videos. I don't have a bus but do have a 2005 motorhome with a Cummins engine and Allison transmission. The setup and maintenance is very similar and I've certainly learned a lot from your videos. I like to do as much of the maintenance and repairs myself when I can.
Scott, the clunk could also be a sticking brake chamber. Apply the brakes and watch them, you can also listen and hear. The chamber fills with air, doesn’t come out, and with the pressure applied it ‘pops’ out and makes a clunk. Maybe there’s something down stream causing that, IE slack, cam bushing. Im not a mechanic.
I've seen the rollers in the brake shoes that interact with the "S" on the S-cam seize up, then they only want to turn if you mash hard on the brakes. You get a "clunk" of protest, as they move under much force.
@@stanpatterson5033 yes, when it’s under air pressure, and something finally gives, it pops out. I’m not a mechanic, my hypothesis was the chamber or something sticking/binding down stream, preventing the chamber from extending.
The previous owner was probably a bus company pushing the envelope on repairs to have no down time for repairs. It happens even on military vehicles. Even though they have a motor pool mechs. The saying no down time is a good time. But then you have to do even more work later and have more broken/worn parts. Where I live in Central Texas there is a lot of sugar sand and it reaks havoc on all components. Plus the humidity is like 70% plus almost daily. Coming from living in Pennsylvania to Texas. I've seen cars being held together with hopes and dreams and a whole lot of wtf in Pennsylvania. To people taking apart an engine to replace the spark plugs. 😂
My son-in-law has an air hydraulic juack from Harbor Freight. He uses it with a hydraulic press. I’ve used the press & jack combination a few times. Nice jack
Is there a king pin bushing in the axle or does it go to a machine shop to repair wear, do you ever replace all the king pin bushings and have to ream them? If so, a video on fitting the new king pin and fitting the shims would be awesome. Love your video, I'm a 20 year car mechanic and then another 20 on diesels of all types, 12 valve cummins, tractors to a 1973 GMC buffalo coach I just got with an 8v71T, it was rebuilt and then overheated at high speed in the desert, and then it sat for 10 years, looks like I will be replacing some jugs due to some cylinder damage. Anyway I love watching someone else do the work for a change., its relaxing. Thanks from California.
Those drum brakes look a lot better than discs
Seeing all that weight sitting on that little circle ( top of the jack that contacts the vehicle ) and then all that weight on that little square patch ( part that contacts the ground ) always makes me nervous. :o
Great job.
The trend is: These busses look great outside and indside but underneath they look like crap and they are very poorly maintained. I guess that service schedules and preventive maintenence are unknown sentences in the RV bus world. 🤔
How do those springs always get put on backwards? It would seem looking at then you could tell it was backwards. But if you work on this stuff shouldn't you know. I mean we all make mistakes but you see this stuff all the time. That many accidental mistakes cant be made!
Steel wheels to aluminum wheels, improper conversion.
Actually always been aluminum but studs got stripped and replaced with the wrong ones. A couple different lengths on it
@@BusGreaseMonkey AH, OK
My parents owned two of those Mirages, I was crew chief and pilot of both, but not at the same time😆
scott, if that chief air hammer ever gives out on you, you need to frame it and put in on the wall, because that little baby has been a workhorse! lol,,,,its done things i just shake my head at at times,,,,,awesome tool for how small it is!
What happen to the Mustang that was sitting in the barn? I love my cooler. Great for traveling.
My family really like the music outro. Is there a music artist that did this for you or is this some form of AI? Thanks for all you do.
His name is Tom Feller, had his own bluegrass band. Scott worked on their tour bus years ago and made a couple songs about "Bus Grease Monkey" and "Bus Grease Mountain". The band even did a small live show when the garage was finished and opened.
Excellent !!!
A good practice when using a jack where the elevation of its top (lifting-surface) pad can be adjusted by preliminarily screwing the threaded shaft closer the load, is to leave an air gap there, and THEN start pumping it up pneumatically.
Why? For any of several reasons, when your job is done the jack may well not return down as low as you need it to in order to remove it; you release it down, happy as clam, but that smile gets wiped off your face when it ceases descending, still tight in place, with a partial load on it making it impossible to take it out.
At that point you're going to really really wish you had dialed in that air gap before lifting the load off the ground. You've kind of put yourself in a bind (but not one that cannot be worked out of; it’s just an Unforced Error, imposing an extra pain in the neck chore, is all).
Found some broken warn out parts
Good job
Love Harbor Freight. Haven't broken a tool from there yet, and I'm not a professional like you
You might need more than shims on that right side
Have you worked on any big time country music stars buses seems like they all live somewhere around you
Thanks for the video.
Can you turn those rotors and drums on a bus he would probably have to have a gigantic lathe Let us let us know
Metal Doctors, Great work guys....
Does the Bodega cooler perform just as good or the same whether you use the cigarette lighter adapter or plug into 110v while in the car? How hot was the exhaust from the vents?
Trade schools for certified Mechanics must teach these short cuts to today's mechanics' - need only 60% of wheel thread grip to secure a wheel = Save money & Time
Does he have enough threads showing on that rim?
Which of the E-bikes did you like
Looks like only those with deep pockets could ever afford to keep these things road worthy. I'm guessing mostly rich old white guys 😂
Rich old people of color are welcome, too! Except for those purple with green polka dot folk with 7 eyes. Nope. ;-)
Anything you do nowadays is hella expensive! New motorhomes are over $100 000 easy, so these repairs are actually not that bad if you get a bus for under $20 000. I got one for 4k.
Well, "old white guys" created them to begin with, like most of the world's great machinery
There could be a good business in offering classes to RV/bus owners basic maintenance and repair. This is after requiring additional driver training to show them how to handle them properly on the road.
So, no black folks have deep pockets?