Woodalls Open Roads Forum: Class A Motorhomes: IR readings for W-22 Brakes


	Already a member? Login here. If not, Register Today! \| Help

Newest | Active | Popular | RVing FAQ

Forum Rules | Forum Help and Support | Contact

Open Roads Forum > Class A Motorhomes

This Topic Is Closed | Print Topic | Post New Topic |

RobtS

Fl.

Full Member

Joined: 09/21/2002

View Profile

Offline

Posted: 02/23/09 04:18am

Link | Print | Notify Moderator

I'm sure there are quite a few of us W-20 & W-22 chassis owners carrying IR readers with us now---how about posting the temperatures that you are recording under normal operating conditions?

What is considered abnormal?

hwybnb

Southern California

Senior Member

Joined: 05/02/2001

View Profile

Posted: 02/23/09 07:00am

Link | Print | Notify Moderator

After having to replace all four rotors on my W22 because of severe cracking I installed a full time temperature monitoring system that uses thermocouples attached to the brake pad backing plates. I have driven several thousand miles with this system, including some difficult mountain passes in Colorado.

What I have observed is that in normal driving with moderate brake use the maximum temperatures are in the range of 250 to 300 degrees. With heavier braking they go up to around 350 degrees. The passenger side rear wheel is the hottest.

I have seen two instances where it went over 500 degrees, once when coming down a long steep grade (in second gear) and once after an extended period of driving in fast but heavy stop-and-go traffic. The highest temperature was 550 degrees.

I have observed two instances where I believe the calipers on one wheel became temporarily stuck, causing the temperature to rise abnormally. In both cases the condition cleared itself.

I have asked both Workhorse and Bosch what the maximum safe temperature is but have been unable to get an answer.

In spite of thousands of complaints WH continues to insist that there is nothing wrong with the brake system and that all failures are caused by improper use of the brakes or poor maintenance. The NHTSB has an ongoing investigation into the problem and hopefully will publish their findings soon.

Gale Hawkins

Murray, KY

Senior Member

Joined: 07/22/2007

View Profile

Offline

Posted: 02/23/09 07:25am

Link | Print | Notify Moderator

hwybnb that was a great job you did both with the hardware and the write up.

While a more indirect tool we have the TPMS that www.tsttruck.com sells.

Besides giving two types of alarms if the tire PSI goes below or above preset PSI readings it will alarm if the tempature goes above a the reading you program in the TPMS computer that comes from the sensor at the valve stem.

The read out of wheel temperature going down the road is interesting as well as the PSI. For a typical vehicle with 6 tires the TPMS is $299. We ordered our system last spring and really like it.

Again this does not compare with your system for details directly from the brake pads but it only requires one to replace the valve stem caps and plug in the computer to the 12v lighter socket in the dash.

Thanks again for sharing your detail solution to a common problem for vehicles that do not get used daily.

* This post was edited 02/23/09 09:33am by Gale Hawkins *

FrontRangeRVer

8,600 feet elevation in the Rockies

Senior Member

Joined: 07/22/2005

View Profile

Posted: 02/23/09 08:18am

Link | Print | Notify Moderator

Thanks hwybnb for the reply!

2006 Winnebago Voyage 35A
W-22 Chassis

50pascals

rochester, ny

Senior Member

Joined: 01/10/2008

View Profile

Posted: 02/23/09 04:28pm

Link | Print | Notify Moderator

hwybnb - Everytime I see that link I decide to build a great setup with an old laptop and labview! The industrial stuff is so flexible (and can be economical).

This Topic Is Closed | Print Topic | Post New Topic |

Open Roads Forum > Class A Motorhomes

	New posts		No new posts
	Closed, new posts		Closed, no new posts
	Moved, new posts		Moved, no new posts

Adjust text size: