Power Steering Pump Bolt Torque Specs

Hello.

After having to use a lot of gas and a slipping clutch just to be able to steer when parking, it's now time to replace my power steering pump. I have some questions about that:

Is it possible to replace the pump without disassembling the entire front of the car (Passat 3B, engine mounted longitudinally)?
2. What are the recommended torque settings for the screws on the bracket and the wood screw? The technical literature ("Jetzt mach ichs mir selbst" and "EL*A") does not provide this information.
Is the power steering fluid the same as the one used in an automatic transmission (ATF III, I believe)?
4. How do you flush the power steering system? Has anyone here ever done that before?

Best regards!

"...okay, the new pump is installed and the steering feels smooth as butter..."

"Yes, it's possible without removing the front panel, but it's quite a delicate and fiddly process."
"Tighten the set screw to 40 Nm, and the rest (using a 6mm Allen key) to 20 Nm."
3. Still no idea, but as long as the standard is correct.
4. Bleed the power steering system, then change the oil. Repeat this process a few times.

If anyone else is facing the same problem:

Symptoms:
When the engine is cold, the steering works perfectly fine. However, when the engine is warm, the power steering assistance stops working at low RPMs.

Cause:
Inside the power steering pump (image: view from behind the shaft), there are vanes that are pushed outwards towards the wall of the pump by centrifugal force (small red arrow) to pump the oil. In the area around the bearing (large red arrow), there were signs of wear between the vanes and the rotor, as well as between the rotor and the back plate of the pump. This was accompanied by a large amount of debris that jammed the vanes in the rotor, preventing them from being drawn outwards or only allowing them to be drawn outwards at high centrifugal forces. This explains why the power steering still worked at high speeds. Furthermore, the system definitely needs to be flushed to remove the debris; otherwise, you won't enjoy the new pump for long.

Best regards!