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Topic: U300 brakes linings. (Read 538 times) previous topic - next topic

U300 brakes linings.

Hi all, we have a 1991 u300 and the brakes are not very good. I am thinking that it must be the brake linings are probably contaminated and need changing as they are at least 10 years old. We have not done many miles so pretty sure they are not worn out. I am struggling to find part numbers and need help. I have been through the manual and all that I know is that they are 4M Dura-Master disc brakes. Can anybody please help. Thank you.
Andy & Liz
1991 U300 40'

Re: U300 brakes linings.

Reply #1 –
Andy,

Are you going to do the brake work yourself, or go to a shop?  The most positive way to identify the correct brake pad set is to pull out the old ones and check the part number.  In some cases you can see the part number on the edge of the pads while they are still installed.  Visibility varies with different brake models.

I found a couple reference documents.  Don't know if they actually pertain to your brake model or not...

http://cbsparts.ca/admin/catalogue/75203_PB1461ADBinfo.pdf  (Page 30-34)

http://www.fgiltd.com/pdf/TransOther.pdf

Meritor/Europe:  http://www.meritor.com/productsandservices/europe/europe_sales.aspx
1993 U280 SE 40' WTBI, Build: 4359
C8.3 300hp, 6-Speed, Exhaust Brake
960 watts on the roof (6 x 160)
Sorento (or BOLT) on a Kar Kaddy SS
"Nature abhors a vacuum"

Re: U300 brakes linings.

Reply #2 –
Brakes don't go bad with age. Why do you think they are contaminated? The disc brakes are not very good when cold. Do they seem to stop poorly after being driven and used?
1999 40 ft. U-320 wtfe build 5563 Chuck & Lynda's "Rollin' Inn"  2030 watts solar
prev. mh's 71 GMC 5 yrs. 73 Pace Setter 1 yr. 78 Vogue 5 yrs 81 FTX 40ft all electric 18 yrs. 1996 Monaco Signature 3 yrs.
2014 Grand Cherokee Overland
Dream as if you will live forever. Live as if you will die today.  James Dean

Re: U300 brakes linings.

Reply #3 –
If this were my coach, I would first take it to a big truck shop and have it checked out, they could be out of adjustment, the slack adjusters may need to be lubed and checked for proper operation, the calipers may need to be lubed, these are just some of the things to check first. ^.^d
The selected media item is not currently available.Bill&Doris 97 U270 36'
University of Parris Island Class of 66
Semper Fi  Build# 5174 MC#17094

Re: U300 brakes linings.

Reply #4 –
Thanks for all your advice. I think the reason the brakes are not good is because our bus does stay standing for a year at a time and the discs go rusty and then all that rust transfers to the pads. They have never been good enough to lock a wheel. Maybe I am expecting too much. Every year in the U.K. we have to have a ministry test and last year the brakes were not good enough to pass.
Andy & Liz
1991 U300 40'

Re: U300 brakes linings.

Reply #5 –
The Meritor discs are found on fire trucks. Go to a main fire station and talk to their maintenance guy to see who they send their trucks to.

First stop of the day is longer. Like above advice, slack adjusters, lub, etc. I have the part numbers for Meritor. Unless sticking, the pad last a very long time.

Pierce

Pierce and Gaylie Stewart
'93 U300/36 WTBI
Detroit 6V-92TA Jake
1140 watts on the roof
SBFD (ret)

Re: U300 brakes linings.

Reply #6 –
Quote from: rvcoupleuk –
Thanks for all your advice. I think the reason the brakes are not good is because our bus does stay standing for a year at a time and the discs go rusty and then all that rust transfers to the pads. They have never been good enough to lock a wheel. Maybe I am expecting too much. Every year in the U.K. we have to have a ministry test and last year the brakes were not good enough to pass.
If that is the case just have them clean the pads and rotors. New pads will have the same issues. Try driving and using the brakes in a stop and go fashion before testing.
1999 40 ft. U-320 wtfe build 5563 Chuck & Lynda's "Rollin' Inn"  2030 watts solar
prev. mh's 71 GMC 5 yrs. 73 Pace Setter 1 yr. 78 Vogue 5 yrs 81 FTX 40ft all electric 18 yrs. 1996 Monaco Signature 3 yrs.
2014 Grand Cherokee Overland
Dream as if you will live forever. Live as if you will die today.  James Dean

Re: U300 brakes linings.

Reply #7 –
Just now noticed you are in the U.K. After checking adjustments, etc, you could bump the compressor up 20 psi and test when the brakes are warm.

Pierce
Pierce and Gaylie Stewart
'93 U300/36 WTBI
Detroit 6V-92TA Jake
1140 watts on the roof
SBFD (ret)

Re: U300 brakes linings.

Reply #8 –
Yes go to a large truck shop but be aware in trucking these brakes aren't all that common. If you can't find some one specifically experienced in these brakes find some one willing to read the manual rather than some one who thinks they can just figure it out on your dime.  Correct adjustment is key as is mechanical condition. What is the test performed are they performance testing the stopping from a set speed or is it a park brake holding test.
Toby a 94 u280
Cummins 8.3
6 speed Allison
Exhaust brake


Adopted by Derek and Annabelle

Re: U300 brakes linings.

Reply #9 –
Since you are in the United Kingdom, as they said above a large truck facility

would be the best place to start. Many things on the FT will interchange with

heavy duty truck all over the world.

Carter
Nac

Re: U300 brakes linings.

Reply #10 –
Thank you all for the help. I will investigate how to check/adjust slack adjusters.
Andy & Liz
1991 U300 40'