Friday, January 20, 2006 - 12:50 pm, by: Dave Hart(Davyboy)
This is what the canister looks like when in bits. It's my spare that didn't have much nitrogen pressure. Needed to be careful when backing off the top screw; leave to hiss until finished. The canister was a bastard to unscrew, as you can see from the teeth marks, I think the o-ring was kinked over for the first turn then easy as. The shiny piece is the piston that fits that way round into the bigger piece. Just a few o-rings to keep everything tight. Not sure of the correct nitrogen pressure or how they pressed it up then put the screw in without losing the nitrogen. Could maybe fit a non-return valve instead of the screw then press it up if you knew the pressure to go to. Just as easy to buy a new one; just thought I'd show you guys what's in there.
Friday, January 20, 2006 - 03:37 pm, by: Mark Paddick(Sparks)
To gas them up they may have done it in a chamber and fitted the screw with a remote arm. This is how some places do boot struts; just stick the whole thing in a pressurised chamber and let the pressurised gas work its' own way past the seals; not really a good idea as if the seals were any good they wouldn't have leaked in the first place and this method wouldn't work to fill them. I suspect you've found the major reason for the electric booster failure .
Friday, January 20, 2006 - 03:56 pm, by: Paul Drane(Paulwd)
I've got a spare unit, I was going to do the same thing as you Dave to see whats in there and if they can be recharged, still gonna have a go and see if I can get it to work.
Don Bagnall Moderator New Zealand 1991 UZZ30 GT4.0 V8
Sunday, January 22, 2006 - 08:43 pm, by: Paul Morante(Breaker)
Something just doesn't seem right, this is a Toyota pieces of equipment, wonderfully machined, great neoprene seals, look at the thread turns to separate the body ... and then they place a squibby little screw in the top to retain the nitrogen !!!
I wonder if a pneumatic nipple would handle the pressure, and allow refilling without removal?
Needs more research for sure, but with the number of second units under scrutiny this may become as important as finding the door chime.
Sunday, January 22, 2006 - 08:53 pm, by: Dave Hart(Davyboy)
Easy to drill and tap a bigger hole and fit a suitable non return valve so nitrogen can be used. The only problem is knowing the amount of nitrogen to put in. All the o-rings could be found at your local supplier along with the correct lube. I too was surprised at the small threaded screw. It only has a few threads before it's ground away so that after a couple of turns open the nitrogen starts to release - a safety feature when undoing.
Sunday, January 22, 2006 - 10:06 pm, by: Paul Morante(Breaker)
Probably overfill, whatever that is. Then bleed of using the non-return valve attached to the nitrogen feed with the appropriate pressure gauge giving a reading. Have to ensure a strong connection to the non-return to take the unknown pressure. It seems Toyota designed the screw for safe disposal that could prove to be the weak link in the pressure vessel leaking nitrogen.
Sunday, January 22, 2006 - 10:24 pm, by: Dave Hart(Davyboy)
The top screw had a hard rubber type washer to do the sealing and the whole lot was covered with a hard compound, which in my case was intact and showed that no leak was from that end. This seems to show that any loss was down past the two o-rings and into the brake fluid. The lubricant looked to have lost its properties and gone a bit hard. Another way out for the nitrogen was down past the thread and o-rings where the two parts came together.
Sunday, February 11, 2007 - 11:51 pm, by: Dave Hart(Davyboy)
I think Neil sells them for $3-400. You could always ask at your local Toyota dealership. If it is your accumulator then the pump will run every few seconds to maintain pressure. If it isn't then the accumulator is probably ok.
Friday, March 16, 2007 - 10:51 am, by: Tom Richards(Tomr)
error 43 is caused by the dvs sensor at the rear of the master cylinder. I believe they are hard t purchase new. I "fixed" this error on my sons car by cutting one of the wires to the sensor. You can see the wires at the rear of the master cylinder, but it is easier to cut on then disconnect the plug. As the fault is only a faulty sensor, you get rid of the error messages with no adverse effect.
Dan McColl Goo Roo Victoria Active V8 and a Factory Manual XF.
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