cobweb

New Member
Brake saga continues!


Okay, so after all the work for the MOT – which was originally on Dec 18th! - I did the welding, the poor window washer supply (that's laugh!), the trackrod end, the loose (and danger to the public!) inner wing panel, and then got onto the brakes. You may remember my earlier post on the matter. Well...


It's a standard 88” series111 2 ¼ diesel with twin brakes system and servo


the failures were:


pulling to left
unbalanced brakes
spongy brakes/excessive brake travel
no servo assistance


Work done is as follows:


new wheel cylinders all round
new brake pipes where needed
new shoes/spings all round (all correctly fitted)
adjusters freed up (what a nightmare) and adjusted properly
system bled god knows how many times using conventional and reverse feed methods.
Landy jacked right up in the air, brake pedal jammed down, res cap removed and left over night
No leaks anywhere after over night under-pressure test


result:


brakes better than it did when it passed the previous MOT with no mention of brakes problems.
Did the pump brakes with res cap off and watch fluid rise and fall test – no fluid drop on brake down stroke so assume Master cylinder is not leaking past seals?


But some questions:


If you remove the rubber pipe from the servo, how much suction should you expect at the end of the pipe?
If you do the “pump up brakes with engine off – hold brake down and start engine” test and the pedal DOESN'T drop a fraction, is this really a problem? Is it a fail issue? Isn't the servo simply there to save your leg?


And at what speed is it reasonable to check for pulling to the side? If I do it at sub-30mph and brake hard but normally – I.E: Not so hard that it means i was driving a) too fast anyway, b) without due attention to the road/conditions/traffic/pedestrians Etc. it doesn't pull at all. If I leather it and stand on the brakes as if I'd just spotted £1million in gold on the curbside with a card saying FREE TO GOOD HOME there is a VERY slight pull. Is this okay or should I tinker some more?


Pedal travel? How far is good? Originally it was almost at full travel admittedly. Having said that I have never had a problem stopping her. Now I have travel of about half way on a FIRST push down, and a tiny improvement on the second? More air to remove or is halfway okay?


I think it's fine now but they've got me to the point where I don't know anymore and am questioning everything. Ideas and thoughts will be appreciated.

cheers
Andy
 
I guess you're all tired of my brakes then! Oh well, it's done now. I THINK! I'll know tomorrow or Wednesday...turns out we have a local Council run MOT station with a Landy Club nut as a tester, and he gets all the series landies to test...

Also...for the ref of others in a similar situation, the remedy (if it works to their satisfaction...which seems to mean that a 20 odd year old deisel landy should have braking power akin to an Audi Quattro) was as follows.

Offside rear...remove wheel and hub, fully slacken off wheel adjusters, strap up shoes, with a ratchet strap, fully closed on wheel cylinders and than loosen a few cracks back.

Buy an eezibleed kit and set it up with spare tyre at 151bs pressure

Attach clean new tube to bleed nipple, other end in a jam jar with half an inch of clean B.Fluid

Attach EB kit to spare and pressurise.

Crack off bleed nipple JUST until you get a flow. Allow to flow until clear. Shut of nipple. Remove kit from tyre. Rebuild wheel and adjust up as normal.

Repeat going from rear nearside, front nearside, front offside.

And it stops like it's hit a concrete pill box! There was (is) a very little left-hand drift but another hour playing with the adjusters and checking tyre pressures will sort that out I think.

I also replaced all the pipes for the servo with hydraulic pipes and a new T union all for £5 from a local hydraulic hose factor. The servo will be pressure tested tomorrow by a friendly Landy man. But I doubt it's faulty now, the way it stops.

Many thanks all. Your original help was fantastic and spot on.

cheers

Andy
Attach EB kit to spare tyre
 
Servo is to save your legs.....But needs to be working..I think..Like power assisted steering....Pulling to the left is probably your brake hose perished inside..

Well did it pass?
 
It goes in Wednesday to the "friendly" MOT guy...unless I decide to take it to the original one tomorrow...call me impatient! I'll let you know.

And thanks for the tip on the pulling to the left. I'll swap the flexies tomorrow. I should have done it anyway. At least now I can bleed the system very quickly and easily with the eezibleed.

cheers slob
 

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