Author Topic: Parking brake does not hold  (Read 196 times)

Offline hokusrick

  • Test Driver
  • **
  • Posts: 5
  • I own: a Motor Home
  • Year: 1989
  • Make: Winnebago
  • Model: superchief
  • Chassis: john deere
  • Engine: 460 ford
Parking brake does not hold
« on: September 05, 2020, 04:37 PM »
first of all a great big thanks for whoever posted the link to the johndeere chassis manual.

The wife and I recently purchased a 1989 Winnebago Super Chief on the John Deere chassis with the ford 460 and C6.  The parking brake is not holding the rv on any sort of incline.  after crawling under the beast I have determined that the hydraulic part of the system is working properly, there is room for adjustment on the cable ends between the hydraulic actuator and the brake drum, but I am having a real problem removing the pins at the ends of the cable. They are seized in the yokes after years of no service.  Any help with removing them without destroying the pins or yokes would be helpful. they are currently soaking in PB blaster after heating the yokes and pins.
Thanks
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Offline hokusrick

  • Test Driver
  • **
  • Posts: 5
  • I own: a Motor Home
  • Year: 1989
  • Make: Winnebago
  • Model: superchief
  • Chassis: john deere
  • Engine: 460 ford
Re: Parking brake does not hold
« Reply #1 on: September 05, 2020, 06:35 PM »
found out the hard way not to wedge something in to keep the hydraulic shaft from returning thus keeping slack on the cable.  This caused a failure in the seal around the shaft.  can anyone tell me the part number for what the John Deere chassis manual is calling the "parking brake chamber"?? 
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Offline hokusrick

  • Test Driver
  • **
  • Posts: 5
  • I own: a Motor Home
  • Year: 1989
  • Make: Winnebago
  • Model: superchief
  • Chassis: john deere
  • Engine: 460 ford
Re: Parking brake does not hold
« Reply #2 on: September 05, 2020, 06:37 PM »
Just a quick note, after a bit of searching several manufacturers make a clevis pin press to remove sticky pins.  going to make my own using a C clamp.
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Online Oz

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  • Posts: 3510
  • Member since: 2002
  • I own: a Motor Home
  • Year: 1974
  • Make: Winnebago
  • Model: D24 Indian
  • Chassis: Dodge
  • Engine: 440-3
Re: Parking brake does not hold
« Reply #3 on: September 05, 2020, 11:47 PM »
Sounds like you had a bit of a self- education session along the way!

I'm going to refer you to call Geoff at Alretta.  He's a vintage brake specialist with over 35 years experience.
If anyone can get you that part number, he can.

www.alretta.com
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Offline hokusrick

  • Test Driver
  • **
  • Posts: 5
  • I own: a Motor Home
  • Year: 1989
  • Make: Winnebago
  • Model: superchief
  • Chassis: john deere
  • Engine: 460 ford
Re: Parking brake does not hold
« Reply #4 on: September 06, 2020, 10:32 AM »
Thanks OZ
hopefully it won't be too expensive an education.
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Offline hokusrick

  • Test Driver
  • **
  • Posts: 5
  • I own: a Motor Home
  • Year: 1989
  • Make: Winnebago
  • Model: superchief
  • Chassis: john deere
  • Engine: 460 ford
Re: Parking brake does not hold
« Reply #5 on: September 06, 2020, 12:24 PM »
Oz, I immedaitely emailed Geoff and much to my suprise, he responded very quickly on a Sunday and told me to call him!  we had quite the comversation over a range of subjects.
thanks again for the info!
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Online Oz

  • *
  • Posts: 3510
  • Member since: 2002
  • I own: a Motor Home
  • Year: 1974
  • Make: Winnebago
  • Model: D24 Indian
  • Chassis: Dodge
  • Engine: 440-3
Re: Parking brake does not hold
« Reply #6 on: September 06, 2020, 05:12 PM »
Super!  Geoff is a great guy.

Did you get your question answered and what about the parts?
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