Hello Steve
Yes from bottom up ... think like the bubbles ... they will also go this way ;-)
For the absolute first time, I would do this:
- Put a tube/hose fitting onto the reservoir, make a tube into a pot/bin.
- Be sure your brake pedals are fully pulled back (if not, the internal valve is closed and filling will not work).
- Fill each line/side, untill you get some fluid in the reservoir and pot/bin, pump slowly.
- Then pump the pedals a few times, pull the park brake valve a few times and let it open.
Let it sit for a few hours like this, give time to wett all inner parts.
- Open the bleed valve at the caliper, just that much, that it start to drip out fluid, then reconnect the tube from the pump. Also without bubbles in the tube!
- Pump again until you have the brake-system volume exchanged again. Both sides.
- Check that the brake pedals are firm and L and R side equal.
- Disconnect the fitting at the serervoir, take a syringe with a piece of tube and take out 1/3 of the level of the reservoir volume. The reservoir filled to 2/3 is enough.
- Put the Vans sinter cap on.
Done!
Thats it! I have done this on a few RV's without any trouble/mess or all the other storys ... 5min per side only!
Things that help:
- Do not use a "pressure tank bleeder", under pressure you press in small bubbles, that will grow when pressure is released. Exactly what you do not want.
- Use clear tubing from the pump to the caliper, then you see, if there would be a bubble.
- Use also clear tubing and a clear bin/pot that you connect at the reservoir.
- If you could not avoid to let a bubble in ... pump once the system volume thru ... to get it out.
I used a custom made hand pump with a bubble-trap and filter at the exit-line. So I can catch all bubble and dirt going into the system.
I hope this helps!