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Whats this thing do? 

 

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 Post subject: Whats this thing do?
Posted: Sun Jan 04, 2009 7:17 pm 
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im bleeding the brakes on an AU ute and noticed this thing in the brake circuit....

do i have to do anything different?

also i suspect the master cyl is stuffed and may need replacing....the catalog says its a different MC for the ute to the sedan....reckon ok to fit a sedan one?

 

 

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Posted: Sun Jan 04, 2009 7:42 pm 
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same as ^^^

more than likely a load sensing device

abd brakes should bleed as normal no need to worry

 

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Posted: Sun Jan 04, 2009 8:00 pm 
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as above, its a load proportioning valve.

More weight in the back, it gives more fluid to the rear brakes.

Its best to have these adjusted when lowering a ute, otherwise the rears can lock up (easier) under heavy braking.

 

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Posted: Sun Jan 04, 2009 8:07 pm 
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Yeah basically the more weight you have the more effective your brakes will be in the back, I asked a similar question when I first saw it on my mates lux.

 

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Posted: Sun Jan 04, 2009 10:05 pm 
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XG's & XH's had the load sensing fitted on the one tonne models - AU's are probably similar.
'E' sedans/XG/XH utes/vans have the same split point, 'E' wagons have a higher pressure split with the master cylinder proportioning valve.
So if you replace a master cylinder, make sure the split point is the same - it's normally stamped on the large offset nut on the mast cyl front.
Any brake place should be able to tell you if the AU sedans/utes have the same split point.

 

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Posted: Sun Jan 04, 2009 10:16 pm 
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snap0964 wrote:
'E' sedans/XG/XH utes/vans have the same split point, 'E' wagons have a higher pressure split with the master cylinder proportioning valve.

So if you replace a master cylinder, make sure the split point is the same - it's normally stamped on the large offset nut on the mast cyl front.



what does the large offset nut look like?
and what sort of things would it have written on it?

 

 

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Posted: Mon Jan 05, 2009 1:18 am 
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my little bit of research has come up with :

1 tonne utes dont seem to have a proportioning valve in the MC instead it has this load sensing one at the back near the axle...

sedans, wagons and 3/4 tonne utes all seem to have different proportioning valves...

at least thats what ive worked out from my gregories manual (dont trust it but)...

as for interchangeability Im not sure

 

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