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1HZ Vacuum Pump
Posted: Fri Aug 31, 2007 7:04 pm
by me3@neuralfibre.com
Why does Toyota put a vacuum pump on their diesels? The ABS is electric not vacuum. The only vacuum I have found is one solenoid for idle up with AC. If it goes cactus, has anyone disabled it?
Paul
Posted: Fri Aug 31, 2007 7:37 pm
by Sixty
Brake booster me thinks......
Posted: Fri Aug 31, 2007 7:57 pm
by Z()LTAN
Sixty wrote:Brake booster me thinks......
whammo
Posted: Fri Aug 31, 2007 8:34 pm
by me3@neuralfibre.com
The ABS is electric not vacuum = Electric pump hyrdaulic accumulator. No vacuum booster.
Paul
Posted: Fri Aug 31, 2007 9:18 pm
by vSAHARAx
Has it got a clutch booster? i know my 60 does?
So their isnt a brake booster in the 100's aye?
Posted: Fri Aug 31, 2007 10:57 pm
by udm
im guessing it probably depends on the car... ie on 80series you have a vacuum line for the brake reservoir/booster and for the AC idle up.
Posted: Sat Sep 01, 2007 2:06 am
by Tapage
In 100 / 105 series the bacc brake ti's made by a electric ( very expensive ) pump ..
There are some vac electric for about 300 USD in the market ..
Posted: Sun Sep 02, 2007 4:36 pm
by thewayitis
Apart from being Clutch and Brake booster, some of the toyota motors use the vaccum to shut down (13bt)
Posted: Mon Sep 03, 2007 7:33 am
by hammey
isn't ABS just a fancy DCV controlling the flow of "pressurised" brake fluid to the individual calipers as required by the computer and determined by the axel rotational inputs?
Posted: Mon Sep 03, 2007 8:30 am
by me3@neuralfibre.com
I don't know about the internals of the thing, but mine has a hydraulic pump on it. They have a huge resovoir of fluid, so their operation is significantly different from a simple inline pressure control.
I wonder why toyota didn't ditch the vacuum pump as it's not used.
Paul
Posted: Mon Sep 03, 2007 9:52 am
by hdj105
I've often thought the same thing, on ABS equipped 100's the only vac device is the a/c idle up as you say.
I'm sure the vehicle will run fine without the idle up, however your a/c won't be as efficient at idle, and things like the p/s may load up at low speed & low rpm corners (eg.supermarket car park).
Posted: Mon Sep 03, 2007 5:38 pm
by dow50r
Its easier for Toyota to make them all with vacuum....the std 100 still has vacuum booster on brakes, and runs 1hz the gxl would do without it all together, as the 4.2 is hard to stall
Posted: Mon Sep 03, 2007 5:39 pm
by dow50r
Its easier for Toyota to make them all with vacuum....the std 100 still has vacuum booster on brakes, and runs 1hz the gxl would do without it all together, as the 4.2 is hard to stall
Posted: Tue Sep 04, 2007 12:37 am
by Tapage
thewayitis wrote:Apart from being Clutch and Brake booster, some of the toyota motors use the vaccum to shut down (13bt)
and 12H-T