Outer Limits 4x4 Board

I have a leaky servo unit on my brakes, but I've never actually opened one of these things up before. It leaks vacuum quite audibly.

Just wondering if aynone's done this, what's involved, what I'm looking for... I honestly don't even have a clue what's meant to be inside this thing

What sort of vehicle chimpboy??

I used to recon these when I started my apprenticeship.

pretty simple, large, but not overly strong spring behind the diaphragm to watch for when undoing the two large halves, you can see how they undo.
Simple valving on the firewall side.

O/haul kit should be pretty obvious what goes where.

Trains

Cool, thanks for that - makes me a bit more confident to open it up.

It's for the stag in my sig line... but I thought it was okay to ask since they are the same design on fourbies too

im having this problem with my patrol, gq.

Bruzar wrote:im having this problem with my patrol, gq.

Checked all the hoses?

Re the stag, I cant remember them, its not the remote vj40 booster on those is it, its just the same as the inline with pedal and brake master cyld.

One fiddly bit to remember when reinstalling it, (along with ample rubber grease), is the reaction disc behind the pushrod for the master cyld.
Its a rubber disc with a small nipple on it, and it gives pedal feel and response, these most often when new can fall out of position when bleeding brakes, and it results in an all or nothing of the brake application.
Quite exciting/ unpeasant, when testing the car for the first drive.
Very rarely have I seen it happen, but it can. You will konw the part im talking about when you see the kit.

I will try and find an exploded view of the unit and post it if I find it.

Trains

Definitely not a remote booster, it looks just like every car I've seen with a booster, pedal arm -> booster -> master cylinder.

While we are on the topic of boosters - anyone ever modded a booster to run on compressed air instead of vacuum (or seen a commercial one capable of this - besides truck air brake actuators).

trains wrote:I will try and find an exploded view of the unit and post it if I find it.

...booster.jpg

That's awesome, thanks a lot! It'll be interesting to find out where it's leaking; it's very audible in the cabin, sometimes a hiss sometimes a whistle.

Just for follow up...

I removed the old booster and there were a couple of issues, a tear in the diaphragm being the main one but a number of other deteriorated seals also being a bit of an issue.

Being a bit of a rare vehicle, no kit was available, so I dropped it in to a very good brake place (had two good experiences there now) for a bit of a "mix and match" reco job.

They charged me $238 to reco the booster, for which I expected them to test and replace all seals etc. However, they also cleaned it right up and painted it, so it looks like brand new.

Very happy.

Cheers,

Jason

Renovating a booster.
Well , I reckon you should re-stump, extend out the back , slap on a deck
and put in some of those nice seven way bi-folds.......oh, hang on
Wrong forum




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When I want something renovated I call a builder.

Sheesh.

renovate verb (renovated, renovating) 1. to restore to good condition; make new or as if new again; repair. 2. to reinvigorate; refresh; revive.

Stop giving me a hard time

renovate - give new life or energy to; "A hot soup will revive me"; "This will renovate my spirits"; "This treatment repaired my health"
reanimate, recreate, revivify, vivify, revive, animate, quicken, repair
energize, perk up, energise, stimulate, arouse.

I'd Give your booster a good old fashioned "arousing."
If that doesnt work give it to someone else to "stimulate",it may" perk up" after that.
But honestly you dont want to "recreate" the wheel.
Just pay some mob to fix it




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What ever happened to the "wreckers reco" clean it and paint it black!!!!!!!