Brake oil pressure problem
 

My 97 TJ needs the brake pedal pumped before driving or I get squealing
from rear brakes when backing out of the drive way. This happens when
the cold weather sets in. This was a slight problem last winter and
had it checked in the Spring.
I got a new set of tires and had the rear brakes checked. I was told
there was no problem (it was warm than). I told them to bleed the
brakes anyway in case it was a moisture problem. In early Fall, when
it was still warm, I had to make an emergency stop and the vehicle
heaved forward and nose-dived. As soon as it got cold this Winter the
pumping of the brakes became necessary everytime fefore driving. I
have not loss any fluid and have not seen any problem on a visiual
inspection - pinches or such. Sooo....
combination valve?
master cylinder?
rear brake problem?
some central distributions reguloator problem?
Thanks,
Steve in Michigan
97 TJ Sport 6 Auto AC > 90,000 stock
No off roading
Mechanical ability limited to maintainance & minor repairs

Re: Brake oil pressure problem
 

I would guess the problem to be in the emergency brake cables,
adjusted too tight, or not releasing properly. Take the drums off and
find out, why the shoes are not seated on the anchors.
God Bless America, Bill O|||||||O
mailto:-------------------- http://www.----------.com/

popeyeball wrote:
>
> My 97 TJ needs the brake pedal pumped before driving or I get squealing
> from rear brakes when backing out of the drive way. This happens when
> the cold weather sets in. This was a slight problem last winter and
> had it checked in the Spring.
> I got a new set of tires and had the rear brakes checked. I was told
> there was no problem (it was warm than). I told them to bleed the
> brakes anyway in case it was a moisture problem. In early Fall, when
> it was still warm, I had to make an emergency stop and the vehicle
> heaved forward and nose-dived. As soon as it got cold this Winter the
> pumping of the brakes became necessary everytime fefore driving. I
> have not loss any fluid and have not seen any problem on a visiual
> inspection - pinches or such. Sooo....
> combination valve?
> master cylinder?
> rear brake problem?
> some central distributions reguloator problem?
> Thanks,
> Steve in Michigan
> 97 TJ Sport 6 Auto AC > 90,000 stock
> No off roading
> Mechanical ability limited to maintainance & minor repairs

Re: Brake oil pressure problem
 

I would guess the problem to be in the emergency brake cables,
adjusted too tight, or not releasing properly. Take the drums off and
find out, why the shoes are not seated on the anchors.
God Bless America, Bill O|||||||O
mailto:-------------------- http://www.----------.com/

popeyeball wrote:
>
> My 97 TJ needs the brake pedal pumped before driving or I get squealing
> from rear brakes when backing out of the drive way. This happens when
> the cold weather sets in. This was a slight problem last winter and
> had it checked in the Spring.
> I got a new set of tires and had the rear brakes checked. I was told
> there was no problem (it was warm than). I told them to bleed the
> brakes anyway in case it was a moisture problem. In early Fall, when
> it was still warm, I had to make an emergency stop and the vehicle
> heaved forward and nose-dived. As soon as it got cold this Winter the
> pumping of the brakes became necessary everytime fefore driving. I
> have not loss any fluid and have not seen any problem on a visiual
> inspection - pinches or such. Sooo....
> combination valve?
> master cylinder?
> rear brake problem?
> some central distributions reguloator problem?
> Thanks,
> Steve in Michigan
> 97 TJ Sport 6 Auto AC > 90,000 stock
> No off roading
> Mechanical ability limited to maintainance & minor repairs

Re: Brake oil pressure problem
 

I would guess the problem to be in the emergency brake cables,
adjusted too tight, or not releasing properly. Take the drums off and
find out, why the shoes are not seated on the anchors.
God Bless America, Bill O|||||||O
mailto:-------------------- http://www.----------.com/

popeyeball wrote:
>
> My 97 TJ needs the brake pedal pumped before driving or I get squealing
> from rear brakes when backing out of the drive way. This happens when
> the cold weather sets in. This was a slight problem last winter and
> had it checked in the Spring.
> I got a new set of tires and had the rear brakes checked. I was told
> there was no problem (it was warm than). I told them to bleed the
> brakes anyway in case it was a moisture problem. In early Fall, when
> it was still warm, I had to make an emergency stop and the vehicle
> heaved forward and nose-dived. As soon as it got cold this Winter the
> pumping of the brakes became necessary everytime fefore driving. I
> have not loss any fluid and have not seen any problem on a visiual
> inspection - pinches or such. Sooo....
> combination valve?
> master cylinder?
> rear brake problem?
> some central distributions reguloator problem?
> Thanks,
> Steve in Michigan
> 97 TJ Sport 6 Auto AC > 90,000 stock
> No off roading
> Mechanical ability limited to maintainance & minor repairs

Re: Brake oil pressure problem
 

That is just plain wrong.

Noise means the brakes are 'on'.

I would also be checking the emergency brake cables thinking they are
set too tight. The adjustment for the emergency brake is the rear wheel
shoe adjustment star wheel. The cable only gets set when installed and
if the rear shoes aren't set first, then the cables become the pivot
point for the shoes which causes strange rear brake operation.

The other thing that comes to mind is maybe you are using the emergency
brake during the winter? If so, the cables can/will freeze up which
holds the brakes in the on position. Pumping the pedal might be enough
to break them free or they might stay locked on until friction heat lets
them loose or you burn them up.

Mike
86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
88 Cherokee 235 BFG AT's
Canadian Off Road Trips Photos: Non members can still view!
Jan/06 http://www.imagestation.com/album/pi...?id=2115147590
(More Off Road album links at bottom of the view page)

popeyeball wrote:
>
> My 97 TJ needs the brake pedal pumped before driving or I get squealing
> from rear brakes when backing out of the drive way. This happens when
> the cold weather sets in. This was a slight problem last winter and
> had it checked in the Spring.
> I got a new set of tires and had the rear brakes checked. I was told
> there was no problem (it was warm than). I told them to bleed the
> brakes anyway in case it was a moisture problem. In early Fall, when
> it was still warm, I had to make an emergency stop and the vehicle
> heaved forward and nose-dived. As soon as it got cold this Winter the
> pumping of the brakes became necessary everytime fefore driving. I
> have not loss any fluid and have not seen any problem on a visiual
> inspection - pinches or such. Sooo....
> combination valve?
> master cylinder?
> rear brake problem?
> some central distributions reguloator problem?
> Thanks,
> Steve in Michigan
> 97 TJ Sport 6 Auto AC > 90,000 stock
> No off roading
> Mechanical ability limited to maintainance & minor repairs

Re: Brake oil pressure problem
 

That is just plain wrong.

Noise means the brakes are 'on'.

I would also be checking the emergency brake cables thinking they are
set too tight. The adjustment for the emergency brake is the rear wheel
shoe adjustment star wheel. The cable only gets set when installed and
if the rear shoes aren't set first, then the cables become the pivot
point for the shoes which causes strange rear brake operation.

The other thing that comes to mind is maybe you are using the emergency
brake during the winter? If so, the cables can/will freeze up which
holds the brakes in the on position. Pumping the pedal might be enough
to break them free or they might stay locked on until friction heat lets
them loose or you burn them up.

Mike
86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
88 Cherokee 235 BFG AT's
Canadian Off Road Trips Photos: Non members can still view!
Jan/06 http://www.imagestation.com/album/pi...?id=2115147590
(More Off Road album links at bottom of the view page)

popeyeball wrote:
>
> My 97 TJ needs the brake pedal pumped before driving or I get squealing
> from rear brakes when backing out of the drive way. This happens when
> the cold weather sets in. This was a slight problem last winter and
> had it checked in the Spring.
> I got a new set of tires and had the rear brakes checked. I was told
> there was no problem (it was warm than). I told them to bleed the
> brakes anyway in case it was a moisture problem. In early Fall, when
> it was still warm, I had to make an emergency stop and the vehicle
> heaved forward and nose-dived. As soon as it got cold this Winter the
> pumping of the brakes became necessary everytime fefore driving. I
> have not loss any fluid and have not seen any problem on a visiual
> inspection - pinches or such. Sooo....
> combination valve?
> master cylinder?
> rear brake problem?
> some central distributions reguloator problem?
> Thanks,
> Steve in Michigan
> 97 TJ Sport 6 Auto AC > 90,000 stock
> No off roading
> Mechanical ability limited to maintainance & minor repairs

Re: Brake oil pressure problem
 

That is just plain wrong.

Noise means the brakes are 'on'.

I would also be checking the emergency brake cables thinking they are
set too tight. The adjustment for the emergency brake is the rear wheel
shoe adjustment star wheel. The cable only gets set when installed and
if the rear shoes aren't set first, then the cables become the pivot
point for the shoes which causes strange rear brake operation.

The other thing that comes to mind is maybe you are using the emergency
brake during the winter? If so, the cables can/will freeze up which
holds the brakes in the on position. Pumping the pedal might be enough
to break them free or they might stay locked on until friction heat lets
them loose or you burn them up.

Mike
86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
88 Cherokee 235 BFG AT's
Canadian Off Road Trips Photos: Non members can still view!
Jan/06 http://www.imagestation.com/album/pi...?id=2115147590
(More Off Road album links at bottom of the view page)

popeyeball wrote:
>
> My 97 TJ needs the brake pedal pumped before driving or I get squealing
> from rear brakes when backing out of the drive way. This happens when
> the cold weather sets in. This was a slight problem last winter and
> had it checked in the Spring.
> I got a new set of tires and had the rear brakes checked. I was told
> there was no problem (it was warm than). I told them to bleed the
> brakes anyway in case it was a moisture problem. In early Fall, when
> it was still warm, I had to make an emergency stop and the vehicle
> heaved forward and nose-dived. As soon as it got cold this Winter the
> pumping of the brakes became necessary everytime fefore driving. I
> have not loss any fluid and have not seen any problem on a visiual
> inspection - pinches or such. Sooo....
> combination valve?
> master cylinder?
> rear brake problem?
> some central distributions reguloator problem?
> Thanks,
> Steve in Michigan
> 97 TJ Sport 6 Auto AC > 90,000 stock
> No off roading
> Mechanical ability limited to maintainance & minor repairs

Re: Brake oil pressure problem
 

The fact that it is cold weather related makes me think you are getting
the problems with brake shoes rusting themselves onto the drums
overnight. This results in loud squeals for the first few feet and first
stops. It also results in overtightening the adjusters, high wear, and
emergancy brake problems. Fix is to install new brake shoes with less
metalic content. Warning: this will reduce your resistance to high speed
brake fade.

popeyeball wrote:

> My 97 TJ needs the brake pedal pumped before driving or I get squealing
> from rear brakes when backing out of the drive way. This happens when
> the cold weather sets in. This was a slight problem last winter and
> had it checked in the Spring.
> I got a new set of tires and had the rear brakes checked. I was told
> there was no problem (it was warm than). I told them to bleed the
> brakes anyway in case it was a moisture problem. In early Fall, when
> it was still warm, I had to make an emergency stop and the vehicle
> heaved forward and nose-dived. As soon as it got cold this Winter the
> pumping of the brakes became necessary everytime fefore driving. I
> have not loss any fluid and have not seen any problem on a visiual
> inspection - pinches or such. Sooo....
> combination valve?
> master cylinder?
> rear brake problem?
> some central distributions reguloator problem?
> Thanks,
> Steve in Michigan
> 97 TJ Sport 6 Auto AC > 90,000 stock
> No off roading
> Mechanical ability limited to maintainance & minor repairs
>

Re: Brake oil pressure problem
 

The fact that it is cold weather related makes me think you are getting
the problems with brake shoes rusting themselves onto the drums
overnight. This results in loud squeals for the first few feet and first
stops. It also results in overtightening the adjusters, high wear, and
emergancy brake problems. Fix is to install new brake shoes with less
metalic content. Warning: this will reduce your resistance to high speed
brake fade.

popeyeball wrote:

> My 97 TJ needs the brake pedal pumped before driving or I get squealing
> from rear brakes when backing out of the drive way. This happens when
> the cold weather sets in. This was a slight problem last winter and
> had it checked in the Spring.
> I got a new set of tires and had the rear brakes checked. I was told
> there was no problem (it was warm than). I told them to bleed the
> brakes anyway in case it was a moisture problem. In early Fall, when
> it was still warm, I had to make an emergency stop and the vehicle
> heaved forward and nose-dived. As soon as it got cold this Winter the
> pumping of the brakes became necessary everytime fefore driving. I
> have not loss any fluid and have not seen any problem on a visiual
> inspection - pinches or such. Sooo....
> combination valve?
> master cylinder?
> rear brake problem?
> some central distributions reguloator problem?
> Thanks,
> Steve in Michigan
> 97 TJ Sport 6 Auto AC > 90,000 stock
> No off roading
> Mechanical ability limited to maintainance & minor repairs
>

Re: Brake oil pressure problem
 

The fact that it is cold weather related makes me think you are getting
the problems with brake shoes rusting themselves onto the drums
overnight. This results in loud squeals for the first few feet and first
stops. It also results in overtightening the adjusters, high wear, and
emergancy brake problems. Fix is to install new brake shoes with less
metalic content. Warning: this will reduce your resistance to high speed
brake fade.

popeyeball wrote:

> My 97 TJ needs the brake pedal pumped before driving or I get squealing
> from rear brakes when backing out of the drive way. This happens when
> the cold weather sets in. This was a slight problem last winter and
> had it checked in the Spring.
> I got a new set of tires and had the rear brakes checked. I was told
> there was no problem (it was warm than). I told them to bleed the
> brakes anyway in case it was a moisture problem. In early Fall, when
> it was still warm, I had to make an emergency stop and the vehicle
> heaved forward and nose-dived. As soon as it got cold this Winter the
> pumping of the brakes became necessary everytime fefore driving. I
> have not loss any fluid and have not seen any problem on a visiual
> inspection - pinches or such. Sooo....
> combination valve?
> master cylinder?
> rear brake problem?
> some central distributions reguloator problem?
> Thanks,
> Steve in Michigan
> 97 TJ Sport 6 Auto AC > 90,000 stock
> No off roading
> Mechanical ability limited to maintainance & minor repairs
>