If the braking system needs to be vented after replacing the main brake cylinder, brake lines, calipers, rear brake cylinders or anything else, most keymen will use the tried and tested method and do so with a helper. One is in the duck and pumps the liquid through with the brake pedal and the other sits near the vent nipples of the brake lines or caliper. This method also works, but can put an end to the main brake cylinder, since the pedal is never fully kicked in during daily use. This unnatural movement of the main brake cylinder can lead to death, especially if the main brake cylinder has been under the belt for a few years. Besides, you always have to be together.

It's only possible, but I don't want to describe that here. Apart from that, this method does not work at all with a new main brake cylinder, because the main brake cylinder comes without brake fluid and even with a full tank it is almost impossible to get liquid into the main brake cylinder, so there is desperate pedal pedaling and air pumping with minimal brake fluid. Because I work 98.57% alone in my workshop, I came up with something.

One-man operation including main brake cylinder protection. In the magazine Oldtimer-Praxis, issue 6/97, remont airers were presented that actually all work according to the same principle. Enter compressed air into the system by means of a compressor or a fully inflated tyre. However, these devices do not have the right connection for the brake fluid reservoir of the 2CV, I do not have a compressed air connection in my workshop and these things also cost a lot of money. And as a half-seauw, I make my brain work to minimize costs.

So I put together my own machine. Due to the lack of a compressor or permanent compressed air connection, I have thought about where I can get the pressure. I grabbed a perfectly normal bike pump, organized about 2.5m plastic hose and an old cap for the brake fluid reservoir. I put a bicycle quick valve in the bicycle pump and fastened the hose with a hose clamp. I sawed off the floating chamber of the brake fluid reservoir and screwed in a vent nipple of a caliper instead of the float pen.

I attached the other end of the hose to the valve. Now there is another problem. The clogged part of the float cover is not airtight. I visually welded it with the help of a soldering iron. After that, it is very simple: unscrew the cap of the brake fluid reservoir and place the cap of the vent device on top. Then with the bicycle pump back to the rear brake cylinders, nipple open, hose on top with bucket to catch and pump the old brake fluid. It works excellently and you are at the site of the action and can bleed or vent the braking system yourself.

Completely change the brake fluid. When venting the braking system, it should be noted that starting at the furthest removed nipple calculated from the main brake cylinder, so that is one of the rear brake cylinders, right or left of the 2CV that is really irrelevant, I chose the right first, I do not know why, but already had problems when I started on the left. Might have something to do with the direction of rotation of the earth or the yogurt or something...

Then, wisely, at the front of the caliper, to the left of the vent valve, the same method. In the case of drum brakes logically with the two front brake cylinders.