DIR Return Create A Forum - Home
---------------------------------------------------------
Old Leafsprung Land Rovers
HTML https://ollr.createaforum.com
---------------------------------------------------------
*****************************************************
DIR Return to: Technical tips & Questions
*****************************************************
#Post#: 102317--------------------------------------------------
What's wrong with my brakes?
By: ProDave Date: May 30, 2017, 2:28 pm
---------------------------------------------------------
Hi all. not been here for a while. Tied up in a major project so
the Landy has not been used much. But I have a problem with my
brakes.
Early series III single circuit non servo brakes.
For a while it's been going from a really solid pedal (almost no
movement at all before the brakes come on) to a normal pedal.
That issue I am sure is something stuck in one of the brakes and
have been living with.
I think what has happened now is a separate problem but perhaps
not?
What happens now, and it just suddenly started doing this, is
the pedal goes half way down with absolutely no resistance, and
I really mean no resistance, then push a bit further, you get
resistance and the brakes work, but by the time the brakes are
braking the pedal is not far from the floor.
The almost total lack or resistance to the brake pedal for the
first half of the travel makes me think it's not adjustment in
any of the brake drums.
My Haynes manual is packed away and hard to get at (in the
middle of a complicated hose move) so I can't refer to that.
#Post#: 102320--------------------------------------------------
Re: What's wrong with my brakes?
By: magnetman Date: May 31, 2017, 10:49 am
---------------------------------------------------------
Hi
Have you checked the brake adjusters?
The symptoms sound like the snail on the adjuster is slipping,
or ,even worse, is loose or bending.that would explain why they
were tight and are now loose
I have seen some replacement adjuster kits that were so bad I
binned them rather than fit them.
Do the brakes pull to one side when you get the pedal problem?
#Post#: 102321--------------------------------------------------
Re: What's wrong with my brakes?
By: ProDave Date: May 31, 2017, 1:25 pm
---------------------------------------------------------
Brakes work fine, pull up straight, not binding. Have checked
adjusters and are adjusted well.
To compound this I had to take it for a drive today, and after
10 miles, it suddenly went back to normal. There is now normal
resistance to the brake pedal from the start, and braking occurs
at about 1/4 brake pedal travel.
What makes me pretty sure it's not slack adjustment, is in the
case of slack adjustment if you press the pedal it goes a long
way, release and immediately re apply the pedal (pump it) and
you get a tight pedal. That was not happening this time.
Something is sticking or otherwise going wrong, the correcting
itself.
#Post#: 102322--------------------------------------------------
Re: What's wrong with my brakes?
By: pintofale Date: June 1, 2017, 2:37 am
---------------------------------------------------------
I had something similar, inconsistent behaviour, a few years
ago. I realised the fluid was ~20 years old and changed it, and
this cleared up the problem.
#Post#: 102325--------------------------------------------------
Re: What's wrong with my brakes?
By: magnetman Date: June 1, 2017, 4:12 am
---------------------------------------------------------
think pintofale is on to something here, if old fluid has got
particles in it which are spoiling the seal in the master
cylinder, you could get your symptoms, I would expect to see a
little leakage from the brake master behind the rubber cap if
this was the case, are you getting anything there?
#Post#: 102327--------------------------------------------------
Re: What's wrong with my brakes?
By: ProDave Date: June 1, 2017, 1:04 pm
---------------------------------------------------------
No sign of leakage. When I bought this Landy, about 5 or 6 ears
ago now, I overhauled the brakes, new slave cylinders, new seals
in the master cylinder and of course new fluid, so I doubt age
is the issue.
#Post#: 102328--------------------------------------------------
Re: What's wrong with my brakes?
By: magnetman Date: June 2, 2017, 7:58 am
---------------------------------------------------------
been thinking about this overnight....
have you checked your flexible hoses for ballooning? (the
stainless reinforced flexibles make a huge difference)
also worth looking at the master cylinder pushrod assembly, if
the nuts are loose allowing the pushrod to move about and jam
occasionally it could give rise to those symptoms.
also check the vent in the master cylinder reservoir cap is
working (just take the cap off and see if it makes a difference
to the pedal)
only other thing is if one wheel is binding and getting hot, it
could cause localized boiling in one cylinder, but that's
clutching at straws a bit
will be interested to find what the fault is...
#Post#: 102332--------------------------------------------------
Re: What's wrong with my brakes?
By: w3526602 Date: June 7, 2017, 1:37 pm
---------------------------------------------------------
Hi,
A pedal that is seizing on it's pivot pin, can cause the pedal
to feel hard as soon as you press it ... but it can also cause a
lot of other problems, it the fluid manages to seep past the
seals back into the reservoir.
Press you pedal down, release it, hook toe under the pedal and
try to pull it back. Pull hard. It should not move.
Remove reservoir cap, eye-ball the fluid while somebody presses
the pedal. You should not see a surge of dirty fluid.
Do you have a CV master (same as the clutch master) or a CB
Master (Big hexagon at the blunt end)?
602
*****************************************************