New tires and other surprises

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New tires and other surprises

April 27, 2022, 07:47:58 pm

My tires have been getting scalloped on the edges for the last year or so increasing with the trip to Mexico. Went to a local shop here in Oklahoma City, bostick's truck tires... For a quote. I had toyo's H rated, they happen to have 12 g-rated in stock. I asked them about the Michelin advantage program that I have through escapees and they told me that they would not be able to obtain Michelin tires right now and that pretty much everything is back, ordered and difficult to obtain. I decided to have them put six on and glad that I did. Originally. I was just going to replace the steer tires. Upon removing the passenger rear side tires, it was found that the brake pad was gone in. Metal was rubbing on metal. The rotor is gone. Needs to be replaced. They could do it there but told me that they would have very difficult time finding parts. They mentioned Freightliner in town as a possible place to go. But if I can get the parts I can have them do it and I like them so I'm going to try to do that. After the tires were back on I discovered that the part number is on the rotor which is no longer accessible to me lol. So I crawled underneath the coach to try to get the plate red off the rear axle. Well I got a good picture of it. It's still not good enough to be sure of the numbers so I'm going to have to try to go under again with some alcohol and clean it up a bit. Maybe take a piece of paper and pencil to it.
So anybody with my year coach... Craneman I'm thinking of you.. That can point me in the right direction for which part I need. Which right now is a rotor. Brake pads. Helper springs. Which I know find it parts has, and possibly new pins. Hopefully the caliper is okay. Checking the forum I have seen that this is not an unusual occurrence. Seems like it's happened to others before and it also seems that it's usually the passenger rear.
By the way, the toyos mounted, balanced and with tax came out to 3300$. If you're thinking you might need tires soon, you might want to start looking now to find what it is that you want.

Re: New tires and other surprises

Reply #1 – April 27, 2022, 07:48:53 pm

Axel plate

Re: New tires and other surprises

Reply #2 – April 27, 2022, 07:57:41 pm

Your rotor # should be Meritor 3218K167 (verify to make sure)
Pads Kit 15625PM
Slide pins Kit 15016
Helper springs Kit 15018
You may need a caliper rebuild kit and new slide pin bushings
You also need to check the slack adjuster for proper operation and make sure that the caliper havent been over greased causing the caliper not to retract.

Mike

Re: New tires and other surprises

Reply #3 – April 27, 2022, 08:37:15 pm

Sent you an email

Re: New tires and other surprises

Reply #4 – April 27, 2022, 09:45:54 pm

Sure looks like enough rotor left to turn and run.

Re: New tires and other surprises

Reply #5 – April 27, 2022, 09:52:28 pm

I'd put the pads in and run it.

Re: New tires and other surprises

Reply #6 – April 27, 2022, 09:59:00 pm

I don't know, just asking. Are the g rated tires able to carry the load? What was factory rating?

Re: New tires and other surprises

Reply #7 – April 27, 2022, 10:22:17 pm

Remember, the load rating is at the max pressure as indicated on the tire sidewall. Lower pressure lowers the load capacity. Rotor looks good to turn. I've even used a grinder while the rotor was being turned to get it looking good. Followed by a arm style dial indicator

Pierce

Re: New tires and other surprises

Reply #8 – April 27, 2022, 10:50:14 pm

Quote from: turbojack – April 27, 2022, 09:59:00 pm

I don't know, just asking. Are the g rated tires able to carry the load? What was factory rating?

Check the load chart against your nose weight.

Re: New tires and other surprises

Reply #9 – April 28, 2022, 12:15:05 am

Like Markb posted just put new pads on it. The grooves just give more braking surface and it will polish up just driving it. The grooves will be permanent but not an issue in my opinion. The picture shows as much meat on the outside as the inside.

Re: New tires and other surprises

Reply #10 – April 28, 2022, 01:35:47 am

I would be very leery about mounting new tires and calling it good when the old ones had a wear pattern on them. Make sure your alignment is correct and the suspension components are not worn. Scalloping is generally caused by worn suspension components, wheel bearings or improperly adjusted axle nut allowing to much movement, Worn shocks. out of balance.

You can have the bearing end play checked when the brakes are serviced.

Re: New tires and other surprises

Reply #11 – April 28, 2022, 08:47:55 am

Quote from: Journey, Roam, Explore – April 27, 2022, 07:47:58 pm

They mentioned Freightliner in town as a possible place to go. But if I can get the parts I can have them do it and I like them so I'm going to try to do that.

You might want to purchase the proper caliper lubricants and dedicated grease guns for the shop to use. Bentonite clay filled grease may not be on their radar.

Regarding your tires, you might want to check the proper inflation pressure at whatever weight you have there. "Looks like" they may be running low, followed by loose tie rods and, or, king pins. In order of probability.

Re: New tires and other surprises

Reply #12 – April 28, 2022, 10:29:47 am

Do you know the last time the brakes were done? Do you use the retarder? I would think that if you use the retarder, brake jobs would be few and far between.

Agree about checking the suspension and components, it would be a shame if your new tires started to do the same thing as your old ones. Glad you caught it before you were on the road!

Re: New tires and other surprises

Reply #13 – April 28, 2022, 11:55:30 am

Appreciate all the replies. To be honest, when I was at the tire place I wasn't feeling that good and now I'm feeling a lot worse with a massive head. Cold. Allergies have been kicking my butt for the last week as well. So instead of saying out side and watching everything they were doing and asking questions I was basically zoning out. So that's my fault. Yeah, I agree that there may be some Worn components up front. Anybody know of a good place in Oklahoma City to get that checked out? There's no way I'm doing it not the way I feel these days. The tire place I was at would do some of that but they're access to parts these days are not good.
While I agree Just putting new pads on might be sufficient. I'm not sure that I could get a shop to just do that. They're going to insist that parts need to be switched out. I would think. I just had my Jeep Grand Cherokee suspension switched out from the air to the strutmaster coil over shocks and struts. That was done last week. The mechanic I use did not want to do it without his parts. He could not get the parts from his local dealer. Of course since strut master only sells through them I believe. He finally did do the work but with no warranty since they were not his parts. I'm still researching this thinking that maybe I would order a new disc and have them install that. If I have the correct part number, then the cost is justified. But everything back there is pretty rusty. Trying to get a mechanic to do what we would do, removing the rust and polishing the components and putting back in maybe difficult to find somebody that would do that. And where my coaches right now in a storage lot would not be a good place to do this work. The ground is soft with gravel and mud. Even if I had the ability to do it right now I wouldn't be able to.
So I'm open to ideas but I know that I can't drive the coach the way it is now. Wasn't planning on doing a trip until June so I have time.

Re: New tires and other surprises

Reply #14 – April 28, 2022, 12:05:50 pm

I would recommend to start calling truck mechanics, some are mobile which is great. Semis break down and they need roadside repair, those folks have the tools and skills to handle this size rig. You may have to make numerous calls, shops are busy and the mechanics are hard to find, and not all shops are taking on new customers. At least that is how it is here. But I was able to find a mobile mechanic for my need and the rate was really fair. YMMV.

Re: New tires and other surprises

Reply #15 – April 28, 2022, 12:07:42 pm

If there is a specification on the thickness of the rotor and yours is within specs. the grooves should not cause a problem for the shop. I agree a mobile mechanic might be in your best interest.

Re: New tires and other surprises

Reply #16 – April 28, 2022, 12:09:45 pm

Check with the local fire department/city maintenance department. Many fire trucks have the same air disk brakes.

Might get one of their techs to moonlight.

Re: New tires and other surprises

Reply #17 – April 28, 2022, 12:19:43 pm

Ok folk time to educate me and us.
The tire wear = what cause is doing it.
Kingpin wear? I have watched "bus grease monkey" showing worn kingpin, replacing. But no word on what that wear causes.
Bearings loose, yup have seen that. Know signs, also have seen worn bearings and races.
Before brakes can be troubleshoot. Doesn't the issue of above need to be done. This wear is expected on all of our coaches. So let's figure out a plan of attack to fix.
Brakes lots of good utube on our brake systems.
https://youtu.be/Ct1qy3HPiXM

Here's a big helper

Technical Help - Air Brakes

Anyone that has spent the big bucks for brake work. Maybe a list of all the little wear items replaced would help

Re: New tires and other surprises

Reply #18 – April 28, 2022, 12:25:54 pm

Quote from: craneman – April 28, 2022, 12:07:42 pm

If there is a specification on the thickness of the rotor and yours is within specs.

Minimum thickens on vented disc 1.626"
The 4M brake book is the bible when it comes to our coach brakes.
There is one or 3 listed in the media section for anyone looking.

Mike

Re: New tires and other surprises

Reply #19 – April 28, 2022, 12:34:02 pm

Quote from: Pamela & Mike – April 28, 2022, 12:25:54 pm

Minimum thickens on vented disc 1.626"
The 4M brake book is the bible when it comes to our coach brakes.

Mike

Mike I imagine that would be per disc side?
I wish I had thought to check that because then I could have given you the answer.
The break issue is with the rear wheel and the front wheel or what got this all started with the scalloped tires. The technician there just told me that it was due to where, although it didn't seem quite right to me considering. The coach has been pulling to the right on my trip up from Mexico. So an alignment and suspension issue upfront is definitely in order. Anyone know of a good place near Oklahoma City? The tire shop recommended Freightliner which I have not looked into as yet. Since I'm not living in the coach right now, and it's in a storage lot, it can sit on a lot while they order parts if need be and it wouldn't be a huge inconvenience.

Re: New tires and other surprises

Reply #20 – April 28, 2022, 12:54:59 pm

Dragging brake pad. This is caused by dirty caliper pins and is preventing caliper to relax away from disc when brake pressure is released. Annual brake pin cleaning and reinstallstion is no big deal if it's done. Daily use helps to keep cleared in active movement area. Helper springs will assist in returning to a relaxed position with brakes released. I carry a non contact pyrometer and regularity check for a hot disc first couple of stops then ignore the rest of the trip. Sorry to see this happen. Napa had pads available. My desire is to do pins every couple of years for my Circumstances
Scott

Re: New tires and other surprises

Reply #21 – April 28, 2022, 01:08:19 pm

We just had our brakes repaired for the third time last summer ,,dam.

First time shortly after purchase so,,not my fault. One caliper and rotor. Pin springs added.
Second time at Foretravel. One rotor, pads and such. Dam Rocky MTNs and Siskiyou pass. Trans retarder joystick added.

Third and I hope last. New rotor and caliper with of course pads. Sure hope I've got this brake thing figured out..... seems I was so paranoid about greasing brake stuff that I never greased the caliper properly. They tried unsuccessfully to get grease in it ,,no joy. But they did show me the zerks that DON'T get greased often. So now I know. Hope third time a charm.

But I'm giving up. This point forward the coach will be going in for brake service (inspection ,greasing ,whatever) every summer in between snowbirding. That will be cheaper than replacing stuff.

And apparently the caliper was quite hard to find.

Re: New tires and other surprises

Reply #22 – April 28, 2022, 01:42:08 pm

I change my wheels twice a year so I see how the linings are. when I got the coach one of the
brake pads was worn more than the others so I have been watching it and it hasn't worn more.
This year I will do as Scott says is to inspect the slide pins.

Re: New tires and other surprises

Reply #23 – April 28, 2022, 02:05:53 pm

Pete. Change your wheels ??

My tire guy did tell me that if I was REALLY worried about it I could switch the inside duals to opposite outside. Regarding UV damage. Got 9 out of the Michelins so prolly not.

Re: New tires and other surprises

Reply #24 – April 28, 2022, 06:44:44 pm

Quote from: Bob & Sue – April 28, 2022, 02:05:53 pm

Pete. Change your wheels ??

My tire guy did tell me that if I was REALLY worried about it I could switch the inside duals to opposite outside. Regarding UV damage. Got 9 out of the Michelins so prolly not.

Snow tires up north in Canada

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