I have removed the whole HICAS unit all the lines fitted the eliminator bar, what is the best way to bypass the pump that fed the HICAS system?

 

Can I just isolate the main feed line from the power steering fluid pot that branches into two on the pump it self or will this seise the pump? just the Hicas side not the power steering side.

 

Or will I have to do it a different way?

 

also the power steering pot has two spigots 10mm on the side. am I right in thinking I only need one of them now?

 

I have added a pic if its of any help

As far as i know mate, yer meant to use a P/S pump from a N/A and yep the redundant outlet on P/S pot can just be capped or weld a small disc over the outlet.

btw, how easy was it removing the pump ?

smithy

Firstly, I believe that there is two impellers in the TT pump (as opposed to one in the NA as Smithy highlighted).having discussed this before, and its too late now youve removed all the pipes, but you could have joined the two pipes thast go to the rear of the car and caused a closed loop, which would mean that there would be fluid for the "hicas side" of the pump to rotate and to keep it lubed. Dont know if you can strip down the pump, remove the impeller from the hicas side and cap it off

There's 2 options:

1) Remove the veins from the rear pump impeller then blank all lines.

2) Take the high pressure return from the rear pump chamber and plumb it straight back into the tank (into the spare 10mm spigot)

 

Or as Jock says, use an NA pump, but you'll need all the brackets etc. too (I did this on mine)

All this doesnt sound good for me :(

 

I've just removed all hicas piping and caped the high pressure output on the pump that's used for hicas.

My theory was that there will still be a small amount of fliud in that part of the pump that would be pumped to a pressure and that's it. (just as though it was coonected to a hicas system thats not funtional)

 

So my question is if a hicas system is not steering the rear wheels there should be no flow from the hicas output from the pump, just a high pressure maintained.

 

The engine is still out of my car and so this is all theory and not proven. If I'm wrong I need to change it pronto before puting engine back in.

If you still have a supply to the pump, then don't just cap it. It will most likely blow the cap off, these pumps produce a resonable pressure as they're positive displacement types.

You could just loop the feed / return on the pump together with a short piece of pipe, or remove the veins.

This may be a stupid question but does the non turbo have the Hicas system?

This may be a stupid question but does the non turbo have the Hicas system?

 

No it don't.

Think i'll have to strip the pump and find out how it works, and if its possible to remove the second pump, or make up a loop system for it.

 

If all else fails it will have to be the na pump route.

 

(smithy) The hardest bit on removing the pump is undoing the banjo bolts as they are fooking tight

You could just loop the feed / return on the pump together with a short piece of pipe

 

i did this when took mine out after a phone call to john d :bow:

Thanks Markzx

Anyone got a hydraulic circuit for the Hicas?

 

I would assume the Hicas circuit is always primed at system pressure via a relief valve, when demand is required the hicas will direct flow to the appropriate cylinder via a directional control valve.

 

Basically, if you blank the supply to the hicas the oil will just bleed over the relief valve(wont blow a cap off as long as the cap is rated to system pressure). You can also re-direct the pressure line back to tank, however this is just waisted energy so I would be inclined to remove the Vain from the pump if this is possible.

 

This is only just an assumption, I need a circuit to be sure.

 

 

Andy

Anyone got a hydraulic circuit for the Hicas?

 

I would assume the Hicas circuit is always primed at system pressure via a relief valve, when demand is required the hicas will direct flow to the appropriate cylinder via a directional control valve.

 

Basically, if you blank the supply to the hicas the oil will just bleed over the relief valve(wont blow a cap off as long as the cap is rated to system pressure). You can also re-direct the pressure line back to tank, however this is just waisted energy so I would be inclined to remove the Vain from the pump if this is possible.

 

This is only just an assumption, I need a circuit to be sure.

 

 

Andy

 

The relief valve may be part of the under bonnet solenoid assy. You could possibly blank the 2 lines running to the back of the car if so, but then you'd still be using more energy than just looping it if it's going through a PRV