New tires and other surprises

Topic: New tires and other surprises (Read 5048 times) previous topic - next topic

Re: New tires and other surprises

Reply #50 – May 20, 2022, 02:51:42 pm

Be absolutely dead sure that helper springs are put on all slide pins, period. ALL, not just the brake(s) being worked on.

Re: New tires and other surprises

Reply #51 – May 20, 2022, 03:20:37 pm

Just make sure the guy doing the work IS familiar with the air disk brakes and that you do use the supplemental spring kit.

You don't want someone to learn how to work on them on YOUR coach.

Re: New tires and other surprises

Reply #52 – May 20, 2022, 03:21:22 pm

Quote from: Pamela & Mike – May 20, 2022, 02:24:26 pm

You need Meritor KIT 15007 for left side caliper major repair kit
Meritor KIT 15006 for right side caliper major repair kit
These are major repair kits for rebuilding those calipers. Everything is included in these but the caliper housing to fix your calipers. These are expensive enough but a lot less than trying to find a complete caliper.

Mike

KIT15007LH by MERITOR - Meritor Genuine Air Disc Brake - Shaft Replacement Kit
$641

Meritor Genuine Air Disc Brake Shaft Replacement Kit - KIT15007LH
$612
KIT15006RH by MERITOR - Meritor Genuine Air Disc Brake - Shaft Replacement Kit
$450
Meritor Genuine Air Disc Brake Shaft Replacement Kit - KIT15006RH
$612

Re: New tires and other surprises

Reply #53 – May 20, 2022, 03:26:06 pm

Use only clay based grease. These breaks are very different than others. You WILL have trouble if the Meritor brake manual is not followed exactly. Don't ask me how I know and there is a soft recall spring to keep them from hanging up. Get it

Re: New tires and other surprises

Reply #54 – May 20, 2022, 05:52:39 pm

Thanks for the part numbers. They sent somebody over from Kenworth to help identify the parts. My feeling is is that they're not going to want to rebuild the caliber but just put a new one on. I did mention the springs and I'll again remind my service manager about that.
This is quite a stressful experience for me right now. Just went through the suspension issues with the Jeep, and now this. I'm trying to get out of Oklahoma and can't seem to do it right now. What's funny is that when I drove the coach over to there it stopped pretty well other than being a little grippy which I assumed was from no more meat on the disc brake. I'm sure sitting around for the last four or five months in Mexico and not being properly lubricated help to cause this problem...
It'll get done though. At least if we can get parts. That's the big thing. All these truck companies keep saying to me that they are having a huge problem getting parts even when you see them listed as available online.
If I felt comfortable and had all the tools I needed I would do it myself and rebuild the calipers. However, I don't have that capability and with brakes being a pretty important thing, not sure. I really want to try learning on it.

Re: New tires and other surprises

Reply #55 – May 20, 2022, 05:54:12 pm

Quote from: wolfe10 – May 20, 2022, 03:20:37 pm

Just make sure the guy doing the work IS familiar with the air disk brakes and that you do use the supplemental spring kit.

You don't want someone to learn how to work on them on YOUR coach.

Heartland trucking service center in Oklahoma City right off I-40. The place is full of over the road trucks. They have good reviews on Google and I'm pretty comfortable with them at this point. Not all of the companies I looked at in this area I could say that about. Still trying to find out if they were able to get the part numbers or not. They're closed on the weekends so I may not find out till Monday but I'm still better than I was 5 hours ago.

Re: New tires and other surprises

Reply #56 – May 20, 2022, 09:19:44 pm

I have done a lot of work on drum brakes but disk brakes are new to me so I'm learning
about them. I watched the video that Texhub but up but mine are different. I guess mine
is an older version. I talked to a friend and he and his brother who owned a truck shop had
never worked on them. Drum brakes have always worked great for me and there is no trouble
getting parts.

Re: New tires and other surprises

Reply #57 – May 21, 2022, 11:24:56 am

Bob I don't know if someone has sent you this manual but here it is.
https://www.foreforums.com/index.php?action=media;sa=media;in=1701

Re: New tires and other surprises

Reply #58 – May 21, 2022, 12:14:14 pm

A good 10" drum on a big rig has a lot of stopping power when cold. I remember how easy it was to lock up all six. But fade in inherent in the design and once they are hot, they don't cool down rapidly. Working on them is harder plus the drums weight a lot and adds to the unsprung weight. All part of the reason disk brakes have dominated the vehicle market for the last few decades. Even bicycles have them now.

Fire departments went to disk brakes first as the very frequent maximum braking effort followed by acceleration and them more braking overheated the drum brakes on each emergency response, especially if the city had any hills. A couple of our trucks had 10,000 lbs of liquid on board so increasing the stopping power was welcome.

Arguments for both types on big rigs but for our use in a motorhome, the advantages of disk brakes far outweighs any disadvantages. Disc brakes vs. drum brakes

Pierce

Re: New tires and other surprises

Reply #59 – May 21, 2022, 01:49:38 pm

On a mountain bike I would only use disk brakes. On a coach both kinds work for me as
I only use brakes to stop. Right now I am much more familiar with drum brakes but I guess
I'm I am going to learn about disk brakes.

Re: New tires and other surprises

Reply #60 – May 21, 2022, 02:02:01 pm

The major difference between drum and disc is the hotter a drum brake gets the less brakes you have as the drum expands and the stroke stays the same. The reason for the runaway ramps for trucks. The cans used to only have a 2" stroke and when the drums expanded the shoes didn't reach the drums. disc is the opposite the hotter the better up to a point.

Re: New tires and other surprises

Reply #61 – May 21, 2022, 02:13:24 pm

Quote from: Pierce & Gaylie Stewart – May 21, 2022, 12:14:14 pm

A good 10" drum on a big rig has a lot of stopping power when cold. Disc brakes vs. drum brakes

Pierce

Pierce, is that 10" wide? I thought the minimum truck drum diameter was ranging from 12.25 x 6.00 to 18.00 x 8.00
Curious. My 3/4 ton dodge has 12" diameter as I recall
Scott

Re: New tires and other surprises

Reply #62 – May 21, 2022, 04:05:30 pm

Quote from: dsd – May 21, 2022, 02:13:24 pm

Pierce, is that 10" wide? I thought the minimum truck drum diameter was ranging from 12.25 x 6.00 to 18.00 x 8.00
Curious. My 3/4 ton dodge has 12" diameter as I recall
Scott

Surface area on the drum and shoe width was 10." We had too many old trucks from the 1950's that ran out of brakes quickly in non emergency driving in the hills behind SB. The early Crowns were better but we started specifying 10" wide drums on the later Crowns, La Frances, etc. Easy to smoke all 6.

When we re-powered with Detroit 8V-71s, the admin knew nothing about diesels so passed up the chance to add Jakes to the orders as they were too cheap to spend a dime more than they had to. Terrible mistake. I ran out of brakes in the Malibu mountains and had to put the La France's right side down into the shoulder to stop it. And this was in 1st gear. The Internationals had Alisons with retarders but with 1000 gallons of water and 250 gal of diesel, it didn't take much to make the big yellow warning light come on.

Pierce

Re: New tires and other surprises

Reply #63 – May 21, 2022, 04:50:22 pm

Quote from: Journey, Roam, Explore – May 20, 2022, 05:52:39 pm

Thanks for the part numbers.
My feeling is is that they're not going to want to rebuild the caliber but just put a new one on. I did mention the springs and I'll again remind my service manager about that.

1) At least if we can get parts. That's the big thing. All these truck companies keep saying to me that they are having a huge problem getting parts even when you see them listed as available online.

2)If I felt comfortable and had all the tools I needed I would do it myself and rebuild the calipers. However, I don't have that capability and with brakes being a pretty important thing, not sure. I really want to try learning on it.

1) Order the parts and have them shipped to the garage of your choice.

2) If I can administer antibiotics through a previously place PICC line, you can follow the instructions to re-build your calipers.

That being said, after Lynn stuffed the Studebaker last summer, and the car was towed to the body shop of my choice, I ordered the parts and had them shipped to the shop. End of drama.

Re: New tires and other surprises

Reply #64 – May 21, 2022, 05:48:03 pm

Quote from: oldguy – May 21, 2022, 11:24:56 am

Bob I don't know if someone has sent you this manual but here it is.
https://www.foreforums.com/index.php?action=media;sa=media;in=1701

Thanks! Have it. Been studying it.
Old toolmaker, if I could, I would. Been thinking about it. But no place to do it..

Re: New tires and other surprises

Reply #65 – May 21, 2022, 06:07:38 pm

When I was young they used water to cool the brakes on the logging trucks. There was a big
tank of water which they put in 10 lbs. of air pressure to cool the brake. The driver needed to
know what they were doing. Water too soon it might effect the brakes stopping power and if
waited too long they would brake the drums. They best cooling was steam coming off the brakes.

Re: New tires and other surprises

Reply #66 – May 21, 2022, 09:02:43 pm

Quote from: Journey, Roam, Explore – May 21, 2022, 05:48:03 pm

Thanks! Have it. Been studying it.
Old toolmaker, if I could, I would. Been thinking about it. But no place to do it..

Then just order the parts and end the Drama.

Years ago, my friend Don sent the tranny from his '57 300 out for overhaul. Then learned more about the transmission and sent it out to someone else to be done over again, this time in high horsepower trim. Somewhere in this journey the torque converter was held up "because it needs a new ring gear" so don found one ordered it and had it shipped to the shop doing the torque converter. Problem solved.

Re: New tires and other surprises

Reply #67 – May 23, 2022, 08:15:28 am

Quote from: Old Toolmaker – May 21, 2022, 09:02:43 pm

Then just order the parts and end the Drama..

Lol .. yeah you know what they say. It's all fun and games until someone loses a wiener lol. Yeah they quoted me over $8,000. So after careful consideration and a offer from John 44 to come and do the work at his place in Tennessee, I have just called the company to say I'll be picking up the coach today. They have an ordered parts yet so.
So they told me that the calipers are on back order and not available. Anybody have a part number for the calibers on the rear Axel? Since I paid to have them come look at it and give me part numbers I'm pretty sure they'll have it but want to see if anybody here on the forums have it. Also not quite understanding the rebuild kit part numbers. One says left hand one says right hand on the rebuild caliper kits. Are we talking about two parts of the caliper? Or the left side and the right side? Seems like a simple question... And I should have that answer before I order it. From what I see on find it parts, the rebuild kits are as expensive as the calipers but I'm not sure if I'm looking at the same thing or not.
Bob

Re: New tires and other surprises

Reply #68 – May 23, 2022, 08:56:15 am

The major repair kit is made one for right side the other for the left. The difference is the actuator shaft helical splines are backwards from each other. So a left side and right side. The way the shop gave you info it seemed like you had major damage now you may only need the Meritor KIT 15001 Minor repair kit for each side. This is basically a seal/Oring, spring, and pin set that runs for ~$100. Any shop that has worked on this type disc brake system should know that you rebuild the calipers not just replace parts.

Mike

Re: New tires and other surprises

Reply #69 – May 23, 2022, 11:18:12 am

Thanks Mike. There's a couple hundred dollar difference between the two so I was wondering what that entailed.. I'm pretty sure that it meant one for each side, but not sure why they're such a huge price difference.
Find it parts once over $400 to ship the rotor. They're also not currently offering their 10% off. Jit trucking. Had a 10% off yesterday and now it's no longer there. So much fun...

Re: New tires and other surprises

Reply #70 – May 23, 2022, 11:24:44 pm

Okay I'll parts are now ordered. Initially everything but the rotor was coming from. Find it parts.com. I was able to get the caliper rebuild kits major, along with new side pins kit, that also comes with the return springs, meritor, Grease , and new pads. For some reason they were quoting me $450 for shipping but when I took the rotor out, shipping was free so I ordered all the parts except the rotor. Rotor. Figured I could get the rotor at a local Napa. I can but it's $4 80 or so dollars. Just now. I look back on find it parts and was able to order the rotor for 298 with free shipping. I have absolutely no idea why it changed. But it didn't and I'm happy about that. Also got a 20% off coupon to use and some points that I accrued with the other parts order. So right now all parts are ordered and I'm going to order a few bigger snap ring pliers.
When I picked up the coach today, the estimate that heartland trucking gave me seemed fair. Not fair to me necessarily, but based on today's pricing I thought it was fair. But it was over 5,000 just for the passenger rear and that's not including having other issues with the caliper. Which they already said they would not rebuild only replace and there were no replacement units currently available. At least that's what I'm told. $8, 000 if you include replacing the caliper on the driver side. I drove it back to my storage area in the rain and had no problems stopping. Be interesting to see what it actually is looking like there when we take it apart.
If anybody needs anything from find it parts, CAUSE10 he'll get you 10% off. Don't know how long it's good for.
Bob

Re: New tires and other surprises

Reply #71 – May 24, 2022, 12:22:51 am

How will you get it to TN from OKC? Can it be driven that far?

Re: New tires and other surprises

Reply #72 – May 24, 2022, 02:09:46 pm

I think I can without a problem. It doesn't appear to be dragging and in the 35 minutes of driving back to my storage area I didn't notice any issues.

So a couple of thoughts that I'm looking into. Maybe somebody has the answers for me.
What other things do I need to be thinking about with this job? Will I need to put new studs in the rotor? If so, does anybody know the size of those studs? Are they pressed in or bolted in?
What other tools should I be considering? Will I have to replace the bushings on the calipers? If so, does anybody have a part number for that?
Will I need to drain the oil from the transaxle? If so, what does it take? And how much.
I realize all these things could be researched on the forums, but frankly I don't have time so I'm asking for help here. Got a lot going on at the moment...
The nuts holding the wheels on are kind of old now too I guess. So should I replace those? If so does somebody have a part number?
Anything else? I'm not thinking or considering?
Thanks
Bob

Re: New tires and other surprises

Reply #73 – May 24, 2022, 05:06:06 pm

Service manual for Meritor with drawings for how to do it are on our Forum here: https://www.foreforums.com/index.php?action=media;sa=media;in=1701

My PDF with all the drawings and part numbers is too big to post and I don't have time as I have an appointment so can't split it so send email or wait until tonight and I will compress it and post it.

See YouTube for videos of how to do it.

Pierce

Re: New tires and other surprises

Reply #74 – May 24, 2022, 05:21:16 pm

Quote from: Journey, Roam, Explore – May 24, 2022, 02:09:46 pm

1. Will I have to replace the bushings on the calipers?
2. If so, does anybody have a part number for that?
3. The nuts holding the wheels on are kind of old now too I guess. So should I replace those? If so does somebody have a part number?

1. Possible they will have to be measured with a micrometer to see if they are in spec.
2. KIT 15010 If the number hasn't changed sense the last time I got some.
3. I wouldn't

Mike

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