Is there special instructions/video to bleed the Magura RT8C?

I came across similar challenge when trying to fit the Magura RT8 TT brakes on my road bike with the Shimano Dura Ace levers. So converting to RT8C is a nice way to enable hydraulic rim braking with my normal cable operated road levers.

The original PDF instructions does not mention much about the RT8C as it is geared towards RT8 TT. The YouTube video is also for RT8 TT, not useful for RT8C.

Having tried half a dozen times with different techniques, I finally found a way that works and it works consistently each and every time. And I am happy to share this with others. Hopefully this would reduce the level of frustration involved when trying to bleed a RT8C system, as this as simple as a Shimano or SRAM hydraulic brake.

You would need to Magura Pro Bleed Kit to complete this procedure.

Here is the procedure I follow:

1. Ensure RT8C is levelled.
2. Tip and reposition the bike on bike stand, to ensure RT8C is slightly higher than the brake calliper, to ensure any air bubbles in the hydraulic system rises toward to outlet port of RT8C for collection.
3. Depress the Quick Release on RT8C to depressurize the hydraulic system.
4. Remove the Hex bolt to open the inlet port on the brake calliper and connect syringe with brake fluid. If the previous step has been done properly, no fluid should rush out.
5. Remove the EBT screw to open the outlet port on the RT8C and connect the Pro Bleed kit. If the inlet port has been connected to syringe properly, no fluid should rush out.
6. Position the drainage tube of the Pro Bleed kit such that it immediate ascends vertically after the fluid exits the outlet port, gaining as much altitude as possible. You would need to hang the Pro Bleed kit a bit higher than the RT8C. The drainage tube itself would form a staging vertical column of brake fluid to enable air bubbles to rise and purge from the system. Note that this technique does NOT require constant flushing of brake fluid thru the system. In fact, if done properly, no fluid should be drained into the Pro Bleed kit bottle. The vertical column of brake fluid serves as the exchange, to allow proper purging of air from the system whilst immediately filling those gaps with brake fluid.
7. Plunge the syringe just a bit, until brake fluid appears in the drainage tube vertical column created in previous step, and form roughly a 10-15cm column of brake fluid.
8. Now depress and release the brake levers in quick successions and repeatedly. You should see some air bubbles appearing in the staging vertical column of brake fluid.
9. Let bubbles rise to the top. As this happens the brake fluid would rush in the fill the void. The fluid level will drop. Plunge the syringe a bit further to push more air bubbles out until the 10-15cm column is restore.
10. Repeat the previous 3 steps until no more bubbles can be seen
11. Now depress and release the Quick release mechanism to purge any air bubbles within; Repeat this step until no bubbles can be seen. You may need to use your fingers to move the quick release pistons manually, whilst having the QR lock depressed. Just popping the QR piston out once or twice is not enough. Manually exercise the pistons in a push/pull fashion in quick successions to achieve effective air bubble purging.
12. Repeat the previous 5 steps until no more bubbles can be seen. You may have to go thru a few cycles to ensure there is absolute no air bubbles in the system.
13. The hydraulic system should now be free from air bubbles
14. Leave the Quick Release open to ensure extra fluid is in the system to re-pressurize the hydraulics once both the inlet and outlet ports are closed.
15. Check how responsive the vertical column of brake fluid is, in relation to brake level movements; also check this with the QR lock release movements. You should see direct correlation of rise/fall of the brake fluid when these levers and valves being operated. If not responsive, then there is still air in the system. Repeat previous steps until the outcome has been achieved.
16. Reposition the Pro Bleed kit so that it is BELOW the outlet port, so that upon disconnection, all the remaining fluid in the vertical column shall drain into the bottle.
17. Disconnect the drainage pipe connector of the Pro Bleed kit from the outlet port. And hold the connector high to drain all fluid into the bottle.
18. Screw on the EBT screw; Wipe clean
19. Disconnect the input tube of the syringe from the inlet port; Retract the syringe piston until no fluid is in the connection pipe to minimize dripping.
20. Screw on the Hex bolt; Wipe clean
21. Wipe clean all inlet and outlet ports from brake fluid using Isopropyl Alcohol.