Re: New tires and other surprises Reply #150 – August 05, 2022, 12:17:19 pm Tried that,no good. Quote Selected
Re: New tires and other surprises Reply #151 – August 05, 2022, 02:17:07 pm Did you adjust the 5/16 square. Drive to the full loose position with the adjuster ratchet release clip installed? I actually purchased a eight point socket just for future work. Makes it much easier Scott Quote Selected 3 Likes
Re: New tires and other surprises Reply #152 – August 05, 2022, 02:28:41 pm Remove the sla ck adjuster set screw completely. back the slack screw until the lever moves at least an inch. Try retracting the caliper . You may find that some vacuum wil aid its' retraction. Quote Selected 1 Likes
Re: New tires and other surprises Reply #153 – August 05, 2022, 05:09:00 pm Just tried that,the slack adjuster did move about an inch,going to pull the caliper off and check the operation of it and go over therebuild job. Quote Selected 2 Likes
Re: New tires and other surprises Reply #154 – August 05, 2022, 07:03:23 pm Pretty sure we found the problem,will let Bob explain. Quote Selected 1 Likes
Re: New tires and other surprises Reply #155 – August 05, 2022, 11:14:53 pm So I will take full responsibility for this snafu although part of the problem was meritor. Poor quality control out of the factory means that the camshaft was out of spec. The camshaft drives a nut that's as big as my hand. Almost That pushes the piston into the brake pad to stop the coach. On the camshaft there is a thrust ring. I guess it's just there to keep it in place and to keep it from wobbling maybe... Anyway, since the new camshaft couldn't be used, I reused the old camshaft. These are left and right hand threaded so you cannot interchange the right side caliper with the left side caliper. So I had to use the old left-sided camshaft with the new nut and the new thrust ring... Yeah on top of the old thrust ring which was covered in Grease and I didn't see it. Taking the caliper off today was actually pretty easy with a small two ton bottle. Jack. I have another set of brake pads for the front so I could use them but the other ones look okay too. Just a matter of putting the caliper back on in the morning after putting the brake pads back in.One or two millimeters is all it took to not go over the rotor properly which was a good thing.I really just wanted to put the thing back together and drive it and see how things went. But enough people thought that was a bad idea including David and myself after. I really thought about it with a good night. Sleep to pull caliper again. So lesson learned. If something doesn't look right it isn't. Quote Selected 3 Likes
Re: New tires and other surprises Reply #156 – August 05, 2022, 11:18:02 pm Quote from: dsd – August 05, 2022, 02:17:07 pmDid you adjust the 5/16 square. Drive to the full loose position with the adjuster ratchet release clip installed? I actually purchased a eight point socket just for future work. Makes it much easier Scott Scott, when you lift up the Pawl to adjust a slack adjuster, All it does is move the slack adjuster back and forth but doesn't do anything on the cam shaft. If you try to move it without lifting the paw it says it can damage it. That was the first thing we tried this morning.Last picture was of me being frustrated and we're out with trying to figure out what the heck was going on... Plus I banged my head more than a few times on hard knobbly things... Quote Selected 2 Likes
Re: New tires and other surprises Reply #157 – August 05, 2022, 11:36:59 pm Quote from: Journey, Roam, Explore – August 05, 2022, 11:18:02 pmScott, when you lift up the Pawl to adjust a slack adjuster, All it does is move the slack adjuster back and forth but doesn't do anything on the cam shaft. If you try to move it without lifting the paw it says it can damage it. That was the first thing we tried this morning.Last picture was of me being frustrated and we're out with trying to figure out what the heck was going on... Plus I banged my head more than a few times on hard knobbly things...So if loose you can rotate the square drive, but you cant back it up without releasing paw. Manual covered it well enough for me to follow last time. Glad you sorted it out. Dont forget to remove what ever you put under the head to release it. Wont automatically advance anymore. Bob it's s always fun learning new stuff or figuring out what they intended.👍👍 dont get me wrong I wouldnt want to earn a living doing brakes but still has to be done. Scott Quote Selected 3 Likes
Re: New tires and other surprises Reply #158 – August 06, 2022, 02:51:16 pm Yeah you're right. There. Actually feel really good about the work David and I did. I've got some cuts that are going to take a little bit to heal on my right hand, but I think I probably lost 10 lb in water weight too. But the experience was worth it. Never could have done it myself though. I couldn't even have gotten the lug nuts off myself. They're were on to tight... And the thought of getting out from under the coach to find something that I forgot to bring with me would have been miserable as well. It's always better to have a partner that can hand you tools and things when you're stuck underneath that beast. And David did plenty of his share of getting up underneath the coach, although I did more of sweating than he did...David and I finished up. The wheels are all on and torqued, even the decorative hubs and decorative lugs are on. I'm going to wait until tomorrow to fire this baby up because with all the rain the driveway still kind of wet and I don't want to cause any damage to David's driveway. And then we'll back it up and brake and see if the slack adjusters automatically adjust.For those of you that are interested, I'm going to attach some photos of the camshaft and nut and the housing that it fits in. The last photo is of the thrust washer. Hopefully none of you will have to do this but if you do this thread should help. Quote Selected 5 Likes
Re: New tires and other surprises Reply #159 – August 06, 2022, 05:17:10 pm You don't have to move the coach to check the automatic adjusters. That was the old drum brake method. With discs just apply and release, the pads don't move back and forth. Quote Selected 6 Likes
Re: New tires and other surprises Reply #160 – August 07, 2022, 06:26:52 am The square socket is 5/16 eight point socket. Quote Selected
Re: New tires and other surprises Reply #161 – August 07, 2022, 08:47:23 am Quote from: Journey, Roam, Explore – August 06, 2022, 02:51:16 pmYeah you're right. There. Actually feel really good about the work David and I did. I've got some cuts that are going to take a little bit to heal on my right hand, but I think I probably lost 10 lb in water weight too. For those of you that are interested, I'm going to attach some photos of the camshaft and nut and the housing that it fits in. The last photo is of the thrust washer. Hopefully none of you will have to do this but if you do this thread should help.Soap and water followed by Neosporin and an adhesive strip for the first night.What you and probably the book call a cam, I'd call a lead screw and nut. What grease does that stuff get? Quote Selected
Re: New tires and other surprises Reply #162 – August 07, 2022, 08:59:38 am I'd probably call it a Saginaw shaft. The grease is the clay based called for by Meritor. Quote Selected 4 Likes
Re: New tires and other surprises Reply #163 – August 07, 2022, 09:21:11 am Bob will pull out in a couple of days,who's next? Quote Selected 3 Likes
Re: New tires and other surprises Reply #164 – August 07, 2022, 11:50:06 am Quote from: craneman – August 07, 2022, 08:59:38 amI'd probably call it a Saginaw shaft. The grease is the clay based called for by Meritor.How often does Meritor want you to purge that grease for fresh? Quote Selected
Re: New tires and other surprises Reply #165 – August 07, 2022, 12:18:24 pm Quote from: Old Toolmaker – August 07, 2022, 11:50:06 amHow often does Meritor want you to purge that grease for fresh?NOTE: Lubricate brake-actuating components inside the caliper two to four times during the life of the lining, or every six months. Quote Selected 2 Likes
Re: New tires and other surprises Reply #166 – August 07, 2022, 12:45:35 pm Quote from: Doug W. – August 07, 2022, 12:18:24 pmNOTE: Lubricate brake-actuating components inside the caliper two to four times during the life of the lining, or every six months.Much less involved than the drum-wedge brakes. Quote Selected
Re: New tires and other surprises Reply #167 – August 07, 2022, 05:04:14 pm Quote from: Old Toolmaker – August 07, 2022, 12:45:35 pmMuch less involved than the drum-wedge brakes.They stop much better. Quote Selected 3 Likes
Re: New tires and other surprises Reply #168 – August 07, 2022, 09:22:44 pm Quote from: Protech Racing – August 07, 2022, 05:04:14 pmThey stop much better.I wouldn't know what to do if my brakes didn't fade on a hard stop. Quote Selected
Re: New tires and other surprises Reply #169 – August 07, 2022, 09:47:19 pm Quote from: Old Toolmaker – August 07, 2022, 09:22:44 pmI wouldn't know what to do if my brakes didn't fade on a hard stop.Between the all wheel disc brakes and the retarder I am always impressed how well a 17ton vehicle will stop. Foretravel didn't skimp in later years in regards to brake size and capacity. Sorry your coach doesn't share thisScott Quote Selected 4 Likes
Re: New tires and other surprises Reply #170 – August 07, 2022, 09:51:55 pm Same opinion as Scott. The hotter they get the better they stop. Quote Selected 2 Likes
Re: New tires and other surprises Reply #171 – August 07, 2022, 10:44:38 pm When we leave on a trip, I have to go down our driveway in neutral as first gear will push it way too fast. Once the brakes are warm, I can lock up all six with max pedal pressure. Pierce Quote Selected
Re: New tires and other surprises Reply #172 – August 08, 2022, 07:40:02 am Quote from: dsd – August 07, 2022, 09:47:19 pmBetween the all wheel disc brakes and the retarder I am always impressed how well a 17ton vehicle will stop. Foretravel didn't skimp in later years in regards to brake size and capacity. Sorry your coach doesn't share thisScottStrangely enough, the drum brakes on the U225 need a little heat to do their best. Modern brake lining material is wonderful. I'm not interested in exploring brake fade in my 11 ton truck. On the other hand, while Lynn was over in Savannah I went to visit every other day and managed a couple of "full effort" stops from 80 MPH in the Studebaker*, and I wouldn't want to do that twice in a row.I whole heartedly agree modern disk brakes are great but I fear they give a false sense of security for those who have no appreciation for the physics at work in stopping a moving body. A little brake fade is a heads up that there are limits. Just as rising transmission oil temperatures indicates the limits of a hydraulic retarder.Art*Highway construction ultimately determined that cruising at 60 MPH on secondary roads was the path of choice. Quote Selected 1 Likes
Re: New tires and other surprises Reply #173 – August 08, 2022, 08:33:50 pm Our jeep came with ceramic brake pads--does anyone know if they are being used on bug trucks and or motorhomesThey seem to work very well on the jeep and when I checked pads at 55k there was still over half the pad left.Chris Quote Selected
Re: New tires and other surprises Reply #174 – August 08, 2022, 08:46:39 pm Don't know the answer but, I have over 130k and the factory linings aren't 25% worn yet. At this rate they will go over 500K long after I could use the coach. Quote Selected 4 Likes
Topic: New tires and other surprises