Don't like the adverts? Click here to remove them
Vacuum pump
- Thread starter stumog
- Start date
Yes they do for brake servo vacuum.....
Is yours failed or do you think it's failing ?
Towpack
Well-Known Member
Complete pumps and some parts still available. Looks like it works similar to a Rotary engine with a rotor and replaceable tips........
Vacuum pump
Vacuum pump
Don't like the adverts? Click here to remove them
stumog
Well-Known Member
- Joined
- Oct 3, 2012
- Messages
- 3,853
- Country Flag
So I have 2 issues that I think could be related to vaccum issues but happy to be told hmm no.
My brakes are really really shit even with mainly new parts. Do have a set of front discs and pads to go in. However I get a bit of a flat spot like the turbo isn't kicking it to start with and fairly sure both are feed off the same vaccum.
??
The turbo waste gate is opened by the turbo pressure ..... hence you can adjust the waste gate to give more boost .
I think if the vacuum pump was not working correctly it will put a light on in the dash ...the little reservoir has a sensor or switch on it....
If the OP wants to check if he's getting vacuum try rolling down a hill turning the engine off and pressing the brake pedal 6 or 7 times by push number 6 he will be out of vacuum to make the servo work and find he has little breaking unless pushing hard .
Obviously don't do this at the top of a hill with a school at the bottom or a bus que....
I seem to recall vacuum being used on the boost circuit on the FT's. Altitude compensation istr? Creates vacuum under the boost compensator diaphragm to vary the effect of boost on the diaphragm? There are solenoids controlling when it's applied. So it is possible that loss of vacuum affects the turbo on an FT. Could just be a split vacuum pipe or an electrical problem on the turbo fault.
Doesn't loss of vacuum make the brakes hard work rather than not very good? i.e. it's an assist, but if you push hard enough the brakes should be effective?
Doesn't loss of vacuum make the brakes hard work rather than not very good? i.e. it's an assist, but if you push hard enough the brakes should be effective?
- Joined
- Mar 1, 2010
- Messages
- 5,668
Where is the exhaust outlet for the vacuum system?
Towpack
Well-Known Member
There's a valve mounted on the front of the pump which could be the outlet.
Yes ...servo assist so the pedal will feel like you're pushing hard and nothing is happening ..... I think the reservoir holds enough reserve capacity for 5 or 6 pushes before the pedal effort is entirely right leg generated .... have a play in a safe spot rolling down a hill in neutral with the engine off..... you then realise how much work the brake servo is doing.
Most of the 80's and 90's rally cars I had did away with a servo so pedal effort was higher but brake feel was better..... we also ran adjustable bias so you could dial in the amount of front/rear bias on the move to suit conditions
- Joined
- Feb 2, 2013
- Messages
- 17,092
I chanced upon this a while back and it seems popular on MUD
80 series Brake upgrade - [Leaving Land Cruiser Club]
80 series Brake upgrade - [Leaving Land Cruiser Club]
I would think the terrain tamer brake servo would be a better mod IMHO....
100 series calliper's just have one piston enlarged compared to an 80 .... we all know you can use 100 series pads in 80 calliper's so not a big difference there .... the Willwood discs are better than stock but not a massive difference in diameter .... and personally for use in remote area's I would shy away from a load of adaptors for discs and calliper's ....if they fail you're stuffed .
I think you could fit 100 series calliper's and possibly a 100 series master cylinder to a terrain tamer brake booster and have a better setup ..... pushing calliper's to the almost touching the rim extreme is asking for a small stone to cause mayhem when it gets between calliper and rim
