PAS fluid mixing CHF-11S with Fluide DA

[NickCLotus]

Can I mix Fuchs/Titan CHF-11S with Total Fluide DA power-steering fluid in my Peugeot? Both meet the PSA S71 2710 standard but it is just that my existing fluid is redish/brown so is probably Fluide DA whereas CHF-11S is green.

[E-bmw]

Why would you mix when you could just do a fluid replacement with new fresh fluid without mixing?

[cliffords]

It's such a simple and low oil specific application. It will be fine . You can run ATF in it too .

[NickCLotus]

E-bmw said:

Why would you mix when you could just do a fluid replacement with new fresh fluid without mixing?

Because apparently a full drain requires dropping the the sub-frame by 30mm (Peugeot 307), don't want to do that unless really necessary.

[NickCLotus]

cliffords said:

It's such a simple and low oil specific application. It will be fine . You can run ATF in it too .

According to Peugeot Forums "ATF is not to be used in the Electro pump power steering system".

[E-bmw]

NickCLotus said:

E-bmw said:

Why would you mix when you could just do a fluid replacement with new fresh fluid without mixing?

Because apparently a full drain requires dropping the the sub-frame by 30mm (Peugeot 307), don't want to do that unless really necessary.

So why not just syringe the reservoir empty then put a nominal small amount of the new fluid in cycle the steering a few times, rinse repeat until you just have 99%+ of the new fluid?

[NickCLotus]

E-bmw said:

So why not just syringe the reservoir empty then put a nominal small amount of the new fluid in cycle the steering a few times, rinse repeat until you just have 99%+ of the new fluid?

Might be worth a try but looking at the electric pump/resevoir I suspect it may need to be filled quite high to ensure the pump doesn't run dry, although would that be a problem if only for a few seconds or so.

Don't know if this is doable but wondering about disconnecting the return pipe from the resevoir and seeing if I can suck out from there using an oil pump.

[Belle427]

I would suck the existing fluid out and then refill with the new fluid, take it for a short drive and then do the same again.
Ok it uses a bit more fluid but will get most of the old out.

[E-bmw]

If you can disconnect the return pipe easy peasy, run it into a container, have someone cycle the steering while keeping the fluid level up until new fluid comes out of the return.

[NickCLotus]

Sound like the best bet is to suck fluid out of resevoir, turn from lock to lock and suck out again: won't get everythig out but probably 80% or so.

Not sure if it is ok to run the pump for a few seconds when the resevoir is empty to clear that ouit as well, is this likely to damage the pump.

If I am doing this say 80% change is it ok to use CHF-11S instead of the Total Fluide DA which is most likely what is already in there. In fact that is another question; is CHF-11S ok for an electromechanical PAS pump on a Peugeot?

[E-bmw]

NickCLotus said:

Sound like the best bet is to suck fluid out of resevoir, turn from lock to lock and suck out again: won't get everythig out but probably 80% or so.

Not sure if it is ok to run the pump for a few seconds when the resevoir is empty to clear that ouit as well, is this likely to damage the pump.

If I am doing this say 80% change is it ok to use CHF-11S instead of the Total Fluide DA which is most likely what is already in there. In fact that is another question; is CHF-11S ok for an electromechanical PAS pump on a Peugeot?

Doing what you say won't get the last bit out as what is in the system after draining will then just circulate while you turn the wheel.

Best to either remove the return pipe into a waste oil bottle after filling until fresh fluid comes out.

If you can't do that then empty, fill with new fluid enough to cycle clean fluid through the system, then do it again to get most of it out.

Don't know the specific answer to your last point but CHF-11S is used on many cars from 2000 onwards.

[NickCLotus]

In the end went with Mannol 8302 LDS Fluid, not only meets the PSA S71 2710 standard but is also the same redish colour as the original Total Fluide DA.