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Old 09-15-2005, 13:01   #1 (permalink)
Graham G
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101 Servo problem??

On the way to peterborough at the weekend in the GS the brake pedal
inexplicably went to the florr (or close to it) about two thirds of the way
to the show. I carried on to the show regardless, there was just enough bite
to stop you quick enough if you needed to. the pedal would come back up if
primed.

When I got to the show I stopped the truck and proceeded to explain to one
or two people on the stand what had happened. We looked for leaks and there
were none, no missing fluid either. When I tried to demonstrate how far down
they had gone they worked perfectly (engine stopped), so put it down to
brake fade.

On the return journey, I hadn't even got out of the gate when they went
again. It then became apparent that they only went to the deck when the
engine is running, so I'm guessing I must haver a fautly servo, although I'm
somewhat surprised on two counts. Firstly I was lead to believe it had a new
one on it when I bought it, and it does look new, all nice and shiny!
Secondly, I wouldn't have thought it would have just gone like that, I would
have expected it to be more gradual.

Any ideas, before I start pulling it to bits and spending money?

Thanks in Advance

Graham


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Old 09-15-2005, 15:01   #2 (permalink)
steve Taylor
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Re: 101 Servo problem??

Graham G wrote:
> On the way to peterborough at the weekend in the GS the brake pedal
> inexplicably went to the florr (or close to it) about two thirds of the way
> to the show. I carried on to the show regardless, there was just enough bite
> to stop you quick enough if you needed to. the pedal would come back up if
> primed.


My braking problem on Bob was a rear shoe skipping the cylinder.
Couldn't be that on yours could it Graham ?

Steve
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Old 09-15-2005, 19:01   #3 (permalink)
sean101ryan@hotmail.com
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Re: 101 Servo problem??

steve Taylor wrote:
> Graham G wrote:
> > On the way to peterborough at the weekend in the GS the brake pedal
> > inexplicably went to the florr (or close to it) about two thirds of the way
> > to the show. I carried on to the show regardless, there was just enough bite
> > to stop you quick enough if you needed to. the pedal would come back up if
> > primed.

>
> My braking problem on Bob was a rear shoe skipping the cylinder.
> Couldn't be that on yours could it Graham ?
>
> Steve


Carefully check the rest of the braking system first, this doesn't
sound like a servo problem. If the servo goes (usually an internal
Bakelite disc) the pedal stays solid but requires enormous effort to
stop plus may be accompanied by a hissing noise. Servos are like
rocking horse poo but a defender one can be adapted. Same with the
master cylinder, Series 3 fits with an adaptor from the club (you are a
member aren't you? (or this message will self destruct))

Most likely is a problem at the wheel as Steve suggests. possibly a
collapsed snail cam adjuster? Do you get a solid pedal if you pump the
brakes?

Sean
73FL74 101GS
1984 110 2.5NA
Medway Military Vehicle Group
www.mmvg.net

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Old 09-16-2005, 04:01   #4 (permalink)
Austin Shackles
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Re: 101 Servo problem??

On or around 15 Sep 2005 17:31:37 -0700, sean101ryan@hotmail.com enlightened
us thusly:

>steve Taylor wrote:
>> Graham G wrote:
>> > On the way to peterborough at the weekend in the GS the brake pedal
>> > inexplicably went to the florr (or close to it) about two thirds of the way
>> > to the show. I carried on to the show regardless, there was just enough bite
>> > to stop you quick enough if you needed to. the pedal would come back up if
>> > primed.

>>
>> My braking problem on Bob was a rear shoe skipping the cylinder.
>> Couldn't be that on yours could it Graham ?
>>
>> Steve

>
>Most likely is a problem at the wheel as Steve suggests. possibly a
>collapsed snail cam adjuster? Do you get a solid pedal if you pump the
>brakes?
>

I was going to say dodgy adjuster. Exactly the symptoms I had on Edward II
until I discovered that one of the adjusters goes anti-clockwise to tighten,
rather than clockwise.
--
Austin Shackles. www.ddol-las.net my opinions are just that
"For millions of years, mankind lived just like the animals. Then
something happened which unleashed the power of our imagination -
we learned to talk." Pink Floyd (1994)
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Old 09-16-2005, 12:01   #5 (permalink)
Lee_D
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Re: 101 Servo problem??

"Austin Shackles" <austinNOSPAM@ddol-las.net> wrote in message
news:0j3li1t1f127chqv6aal8c6reiiokuukrv@4ax.com...
> I was going to say dodgy adjuster. Exactly the symptoms I had on Edward
> II
> until I discovered that one of the adjusters goes anti-clockwise to
> tighten,
> rather than clockwise.


Shhhhhh!!! Thats the best kept secret in Landroverland.... supposed to learn
that the hard way ;o)

Lee D


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Old 09-16-2005, 12:01   #6 (permalink)
Lee_D
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Posts: n/a
Re: 101 Servo problem??

"Graham G" <NOSPAM@here.com> wrote in message
news:3ots87F7lfinU1@individual.net...
> On the way to peterborough at the weekend in the GS the brake pedal
> inexplicably went to the florr (or close to it) about two thirds of the
> way to the show. I carried on to the show regardless, there was just
> enough bite to stop you quick enough if you needed to. the pedal would
> come back up if primed.
>
> When I got to the show I stopped the truck and proceeded to explain to one
> or two people on the stand what had happened. We looked for leaks and
> there were none, no missing fluid either. When I tried to demonstrate how
> far down they had gone they worked perfectly (engine stopped), so put it
> down to brake fade.
>
> On the return journey, I hadn't even got out of the gate when they went
> again. It then became apparent that they only went to the deck when the
> engine is running, so I'm guessing I must haver a fautly servo, although
> I'm somewhat surprised on two counts. Firstly I was lead to believe it had
> a new one on it when I bought it, and it does look new, all nice and
> shiny! Secondly, I wouldn't have thought it would have just gone like
> that, I would have expected it to be more gradual.
>
> Any ideas, before I start pulling it to bits and spending money?
>
> Thanks in Advance
>
> Graham


Vacuum hoses still ok? Had similar symptoms on the Rangie turned out to be a
split hose leaking when the engine rocked into a certain position.

Lee D


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Old 09-16-2005, 14:01   #7 (permalink)
Lofty
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Re: 101 Servo problem??

On Thu, 15 Sep 2005 19:18:49 +0100, "Graham G" <NOSPAM@here.com>
wrote:

>On the way to peterborough at the weekend in the GS the brake pedal
>inexplicably went to the florr (or close to it) about two thirds of the way
>to the show. I carried on to the show regardless, there was just enough bite
>to stop you quick enough if you needed to. the pedal would come back up if
>primed.
>
>When I got to the show I stopped the truck and proceeded to explain to one
>or two people on the stand what had happened. We looked for leaks and there
>were none, no missing fluid either. When I tried to demonstrate how far down
>they had gone they worked perfectly (engine stopped), so put it down to
>brake fade.
>
>On the return journey, I hadn't even got out of the gate when they went
>again. It then became apparent that they only went to the deck when the
>engine is running, so I'm guessing I must haver a fautly servo, although I'm
>somewhat surprised on two counts. Firstly I was lead to believe it had a new
>one on it when I bought it, and it does look new, all nice and shiny!
>Secondly, I wouldn't have thought it would have just gone like that, I would
>have expected it to be more gradual.
>
>Any ideas, before I start pulling it to bits and spending money?
>
>Thanks in Advance
>
>Graham
>


Have a look in the master cylinder reservoir as the brake pedal is
pressed, fluid movement or air in the fluid means the primary seals in
the master cylinder are leaking. ie brake fluid is passing back over
the seal to the reservoir as the pedal is pressed.

Normally a replacement seal kit is enough to repair.


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Old 09-17-2005, 03:01   #8 (permalink)
Austin Shackles
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Posts: n/a
Re: 101 Servo problem??

On or around Fri, 16 Sep 2005 18:45:16 +0100, "Lee_D"
<newsgroupNOSPAM@NOSPAMlrproject.com> enlightened us thusly:

>"Austin Shackles" <austinNOSPAM@ddol-las.net> wrote in message
>news:0j3li1t1f127chqv6aal8c6reiiokuukrv@4ax.com...
>> I was going to say dodgy adjuster. Exactly the symptoms I had on Edward
>> II
>> until I discovered that one of the adjusters goes anti-clockwise to
>> tighten,
>> rather than clockwise.

>
>Shhhhhh!!! Thats the best kept secret in Landroverland.... supposed to learn
>that the hard way ;o)


hehe.

I'd rather pass it on than have people running around in vehicles where the
brakes don't work until the second application of the pedal...
--
Austin Shackles. www.ddol-las.net my opinions are just that
"'Tis a mad world, my masters" John Taylor (1580-1633) Western Voyage, 1
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Old 09-17-2005, 07:01   #9 (permalink)
Graham G
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Posts: n/a
Re: 101 Servo problem??

>> My braking problem on Bob was a rear shoe skipping the cylinder.
>> Couldn't be that on yours could it Graham ?


possibly


> Carefully check the rest of the braking system first, this doesn't
> sound like a servo problem. If the servo goes (usually an internal
> Bakelite disc) the pedal stays solid but requires enormous effort to
> stop plus may be accompanied by a hissing noise. Servos are like
> rocking horse poo but a defender one can be adapted. Same with the
> master cylinder, Series 3 fits with an adaptor from the club (you are a
> member aren't you? (or this message will self destruct))


Must say, I didn't think it was symptoms of servo, for reasons you describe.

> Most likely is a problem at the wheel as Steve suggests. possibly a
> collapsed snail cam adjuster? Do you get a solid pedal if you pump the
> brakes?


It does go solid if primed. Goody, hubs off again!

Graham


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Old 09-17-2005, 07:01   #10 (permalink)
Graham G
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Re: 101 Servo problem??

> I was going to say dodgy adjuster. Exactly the symptoms I had on Edward
> II
> until I discovered that one of the adjusters goes anti-clockwise to
> tighten,
> rather than clockwise.


Learnt that one last time I did the brakes up!


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