Yesterday, Johan came around and picked up the Spider wheels. I have also given him the spare one. He will take the best old tyre and put it on the spare. When changing tyres, this is a good practice. Obviously, you will still have an old tyre, but its only the spare. The Spider spare tyre had been giving me a little trouble as it was loosing its air pressure if just a few months, so good thing it is being replaced.
This (Sunday) afternoon I decided to finish the work on the Spider. Which meant filling up the brake system with brake fluid and bleed it probably. Those of you who have followed this thread will know I have two different tools to bleed brakes. One a vacuum system and one a pressure system.
I decided to use the vacuum system first, that will probably fill the whole system. Last time when I used it, you might recall, I had some problems. I found out later why. I will show below.
With the vacuum bleeder, the brake fluid is automatically filled with this auto-replenish canister: Notice the various rags, underneath news papers, to collect any accidental spillage of brake fluid.
The sequence of which brakes is related to starting with the brakes with the longest brake line and working your way down to the one with the shortest brake line. On a left hand drive car, usually the right rear brake line is the longest.
So the vacuum-tool connected:
Next left rear:
Right front
Left front:
Here is where it went wrong last time. The brake fluid reservoir is not one big reservoir. In fact it has a front and rear chamber. When you fill it with brake fluid it goes into the front chamber. Near its max level it start overflowing into the rear chamber. An extra safety precaution!
Last time, the auto replenish canister was set to deep in the front chamber, so it replenished the front chamber, but not to the extend of it spilling over into the rear chamber. Which meant when I was bleeding the brakes connected to the rear chamber I drew out all the brake fluid!!
This time I was more cautious and I had adjusted the auto-fill canister properly.
It is a very simple to use system; Push this rubber cup onto the brake bleed valve
Start the vacuum pump, Open up the bleed valve about 1/4 - 1/3 turn:
See the air bubbles and brake fluid coming through the transparant tube, watch the level in the auto-fill canister come down, ensure the rear chamber keeps failing. Close the bleed valve when only clear brake fluid, no air bubbles come through.
I have a bunch of new, used and opened containers of brake fluid. I tend to write on them, if it is used, or the date at which I opened it:
Once I had done all four brakes, I tested the brake system. Remember, the new callipers had their pistons all the way in. So I carefully pumped the brake, with very small strokes until I felt resistance. It felt pretty good, but not perfect. So I decided to give the system a final pressure bleed as well.
All ready to go
This system gets pressurised from a tyre. Mind you, maximum pressure is 1.4 bar, so you need to let some air out of the tyre first. Once I forgot, a line burst and there was brake fluid everywhere!
Once done, I put the pressure back onto 2,5 bars. This is the spare wheel of the Mercedes W123.
I tried the brake pedal again. A noticeable difference. Tiny bit of travel and then rock hard! Just as it should be.
So a quick double check I had tightened all brake bleed valves and put the dust caps back on.
With this pressure bleeder, the brake fluid reservoir fills completely, right up to the rim
So I have this huge thing to extract brake fluid
All full
A little less full:
Put the little filter back in
In all, the work on the brakes has taken me probably some 5-6 hours, spread out over 4-5 days. Usually, I clean up and put away all my tools, but not when the job is not finished. I am always amazed at how many tools come out.
Part of the problem is that I keep a lot of my tools in the car’s boot. I know exactly where everything is. But if you are not familiar with my garage, you could not find a thing.
My wife and I tend to be away 2-3 weeks early January on holiday / family visit. As it so happens we have good friends who run a B&B in France. During the winter months they tend to stay in the Netherlands. They usually stay in our house, whilst we are away. Cees is a very good and handy spanner guy. He often does all sort of job in my garage. But he will text me endlessly because he can never find any of my tools.
They are spread all over the place:
Some are in cupboards
Some are in the W123:
Some are in the Spider:
Some are in the Jaguar
But at the end of such a job there are tools everywhere
Tools just about everywhere:
It took quite a bit of time, cleaning all the tools and getting them back where they belong. Cleaned my garage floor very thoroughly as well.
Jeroen