Hello and welcome to Packard Motor Car Information! If you're new here, please register for a free account.  
Login
Username:

Password:

Remember me



Lost Password?

Register now!
FAQ's
Main Menu
Recent Forum Topics
Who is Online
129 user(s) are online (89 user(s) are browsing Forums)

Members: 0
Guests: 129

more...
Helping out...
PackardInfo is a free resource for Packard Owners that is completely supported by user donations. If you can help out, that would be great!

Donate via PayPal
Video Content
Visit PackardInfo.com YouTube Playlist

Donate via PayPal



(1) 2 3 »

400 treadle-vac failure
#1
Forum Ambassador
Forum Ambassador

Randy Berger
See User information
The treadle-vac in my 400 failed last year coming home from Summit Racing. It was a rather strange failure. My right rear tire blew the tube (wire wheels usually have tubes) because of the heat generated by the brake shoes being constantly in contact with the drum. The drum was so hot we had to be careful not to touch it. I am lucky it did not catch fire. The heat had destroyed the return spring for the primary shoe allowing it to rub against the drum and causing the secondary shoe to ride on the drum also. The lining was destroyed. As a result I had to get flat-bedded home, a little over 70 miles. At the time I did not blame the Bendix master, but instead thought it might be the brake hose to the rear brakes. I had previously installed Venezuelan hoses purchased on ebay. I installed new American-made hoses and also all new wheel cylinders. I replaced any brake lining that looked suspect.
I finally bled the brakes myself the other day and drove the car about five miles to the car wash and home. By the time I reached home the brakes were locking up again. I jacked up the front end and could not rotate either front wheel. I cracked open the right front bleeder and got a small amount of fluid out. I could now rotate either wheel. Last night I removed the Treadle-vac and am going to ship it to Ross Miller for rebuild.
Now before the white knights ride up and proclaim the BTV the worst thing since they no longer required virgins to wear a chastity belt - take it somewhere else. I've been running that BTV since 1992 and have many thousands of miles on my 400 (speedometer has rolled over and now read 5,000 plus miles) so I think it has proved to be a more than adequate unit.
You are of course entitled to your opinion - just DON'T clutter up my post with it!.
I will let Ross determine the problem and resolution.
Stay tuned.

Posted on: 2015/5/9 21:56
 Top  Print   
 


Re: 400 treadle-vac failure
#2
Home away from home
Home away from home

Hans Ahlness
See User information
What?!? Just a straight discussion of what the mechanical failure was and a resolution?

Randy, you're taking all the fun out of this forum! :o)

Posted on: 2015/5/9 22:15
1952 Model 200 Deluxe Touring Sedan
HA's 52 Grey Ghost

"The problem with quotes on the internet is you never know if they're true" - Abraham Lincoln
 Top  Print   
 


Re: 400 treadle-vac failure
#3
Forum Ambassador
Forum Ambassador

HH56
See User information
Interesting. I am kind of curious why you only had problems with the one wheel when the first failure occurred. Any theories?

Posted on: 2015/5/9 23:03
Howard
 Top  Print   
 


Re: 400 treadle-vac failure
#4
Home away from home
Home away from home

Peter Packard
See User information
I just make sure that my cable hand brake is up to snuff,,,,Pt

Posted on: 2015/5/10 3:31
I like people, Packards and old motorbikes
 Top  Print   
 


Re: 400 treadle-vac failure
#5
Home away from home
Home away from home

Troy Taylor
See User information
Thank-You Randy. I ran into Ross and a few others last week at our local show and I was ask why I have not been updating lately. I said I thought this forum was for us to share and help each other out and that I have had my fill of the Trolls milling around constantly telling you how dumb you are or your not doing it "their" way. Not that I don't like different perspectives but the same agenda's crammed down your throat gets old. Glad to see I'm not the only one who has felt that.

Anyway, FYI in case you didn't know, Randy is out of the shop until June 1st. I have a few items to send him as well. Yes, let him determine the issue and lets learn from the facts.

Posted on: 2015/5/10 6:11
[url=https://packardinfo.com/xoops/html/modules/
 Top  Print   
 


Re: 400 treadle-vac failure
#6
Home away from home
Home away from home

PackardV8
See User information
Directly under the brake line fitting on the mc is a residual presure valve. That has probably gone bad and caused excessive residual pressure at thee wheel cylinders.

Posted on: 2015/5/10 7:54
VAPOR LOCK demystified: See paragraph SEVEN of PMCC documentaion as listed in post #11 of the following thread:f
https://packardinfo.com/xoops/html/modules/newbb/viewtopic.php?topic_id=7245
 Top  Print   
 


Re: 400 treadle-vac failure
#7
Home away from home
Home away from home

PackardV8
See User information
That problem has existed for many miles due to the fact that the linings were woren so bad. That one incident did not suddenly wear the linings in just a few miles. Nearly impossible. So the problem has existed for many miles.

Posted on: 2015/5/10 7:58
VAPOR LOCK demystified: See paragraph SEVEN of PMCC documentaion as listed in post #11 of the following thread:f
https://packardinfo.com/xoops/html/modules/newbb/viewtopic.php?topic_id=7245
 Top  Print   
 


Re: 400 treadle-vac failure
#8
Home away from home
Home away from home

PackardV8
See User information
And besides, if u don't want any ones opinion then why did u post your personal probemfor the entire world to see.

Posted on: 2015/5/10 8:02
VAPOR LOCK demystified: See paragraph SEVEN of PMCC documentaion as listed in post #11 of the following thread:f
https://packardinfo.com/xoops/html/modules/newbb/viewtopic.php?topic_id=7245
 Top  Print   
 


Re: 400 treadle-vac failure
#9
Home away from home
Home away from home

d c
See User information
Could have been the residual ck valve or poss the pedal not returning all the way up to full release position to rock the compensator valve off its seat to open the valve to the reservoir. this would not cause drag when cold and first driven but when all is heating up from a long drive with engine temp rising the expansion of the fluid now trapped in the pressure side of the hyd sys with no way to escape will surely cause the brakes to drag, heat up , and worsen the issue. You said the issue was worse in 1 rear but you has both fr dragging too. I assume the problem would first show up on thee wheel with the closest adj of the shoes. You did not say if ALL the wheels had drag when inspecting. I would have put all 4 wheels up, checked for drag on all 4 when hot and if they all released when you cracked 1 fr bleeder then you would have had your definite answer.

Posted on: 2015/5/10 8:42
 Top  Print   
 


Re: 400 treadle-vac failure
#10
Home away from home
Home away from home

Let the ride decide
See User information
After reading this thread, and this one,https://packardinfo.com/xoops/html/modules/newbb/viewtopic.php?post_id=161317&topic_id=16081&#forumpost161317

They got me to thinking, for all you techie people, there should be an ap for this! Ross has a logbook, I have a spiral notepad in the glovebox of each car. But nowadays EVERYTHING has an AP.

Time for a PACKARD service ap. send you reminders to do the service, keeps up with the last thing you did or replaced.

😀😃😄😊☺️

Posted on: 2015/5/10 10:13
 Top  Print   
 




(1) 2 3 »




Search
Recent Photos
Photo of the Day
Recent Registry
Website Comments or Questions?? Click Here Copyright 2006-2024, PackardInfo.com All Rights Reserved