It should be available in most auto stores and yes it is compatible with 3 & 4. Couldn't tell you about the reason for the color of the fluid.
Soft Front Brake Pull
- Thread starter glider.
- Start date
It should be available in most auto stores and yes it is compatible with 3 & 4. Couldn't tell you about the reason for the color of the fluid.
J
Jack Klarich
Guest
As brake fluid absorbs moisture and it will u will get a spongy or soft feal to the brakes dot 5 will crystalize over time and cause problems probably the main reacon H D uses dot 4 now Brake fluid goes not last forever it is one of the most over looked fluids If your brake fluid is dark in color that would be the rubber parts in the system braking down. In the auto industry we use test strips to verify copper content in the fluid .I also use a Shark sold by Mac tools to test for moisture content hope this helps
Dot 5 Silicone based fluid was developed in racing circles for it's higher temperature rating and it's "inert" properties that do not degrade seals and o-rings like ethylene glycol based fluid that intentionally swell slightly making them seal better and "feel" better.
Actually Dot 5 also deteriorates less rapidly, than EG based brake fluids, but being silicone based, it is a contaminant like teflon, so it does not dissolve or break down, and very difficult to clean off surfaces. That is why some primary vendors have banned the use of silicone based lubricant and adhesive products, even the EPA is concerned about it's long term environment effects as being unknown (likely much worse than long life plastics).
Actually Dot 5 also deteriorates less rapidly, than EG based brake fluids, but being silicone based, it is a contaminant like teflon, so it does not dissolve or break down, and very difficult to clean off surfaces. That is why some primary vendors have banned the use of silicone based lubricant and adhesive products, even the EPA is concerned about it's long term environment effects as being unknown (likely much worse than long life plastics).
Hoople
Account Removed
Cool Trick. Is it air that causes the soft brake feel? Somehow the overnight pressure causes the air to go to top? Just wondering what actually happens.
Chopper
Senior Member
If you figure it out let me know, just one of those old indian tricks that works.
Actually Hoop figured it out, the air bubbles rise to the highest point, I go a bit farther by gently tapping to displace bubbles that might be stuck in tight turns within, from the caliper, brake hose, (if two, the one farthest from M/C first), crossover, tubing up to the banjo/master cylinder, with the brake lever bungee corded to grip, squeezing lever several times.
Repeat process in the morning, (if you have the m/c cover off you will see additional bubbles rise from the bottom port), THEN release the lever and pump gently several times in steadily firmer strokes and watch additional bubbles rise out. If you see no more bubbles you are done. Only wish the rear brake system could be done this way, but the m/c and caliper relationship is too level and has loops that trap air bubbles, resisting bleeding this way.
Repeat process in the morning, (if you have the m/c cover off you will see additional bubbles rise from the bottom port), THEN release the lever and pump gently several times in steadily firmer strokes and watch additional bubbles rise out. If you see no more bubbles you are done. Only wish the rear brake system could be done this way, but the m/c and caliper relationship is too level and has loops that trap air bubbles, resisting bleeding this way.
Tks!
J
Jack Klarich
Guest
You can also grab the hoses and shake them, this works good to remove trapped air