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Post by planetal on Sept 20, 2019 21:31:22 GMT -5
I picked up a cheap Taotao and there is no front brake. When I pull it it does nothing. It seems to have some pad life left. It shows that there is fluid in the master cylinder. Should I try to bleed some fluid out first? I wonder if the Master cylinder is just shot and I gotta get a new one on. This is my first post in here. I took the assembly apart and seems to look ok. But, when I pull the lever, it does nothing.
Sooooo, I got it for $100. He was a accountant and didn't know much about fixing things. Said it needed a new starter, but I found a broken wire to battery. Seems to run ok, I adjusted the carb idle a little bit. Has a squeal in the rear brake when I go about 20 mph. I think the brake was too tight, and loosened the cable, but might have to do the brakes too there.
I'm not sure it there is a brake thread , or if I put this in the right place in the Forum.
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Post by chehystpewpur on Sept 20, 2019 22:24:33 GMT -5
pull the back tire off and inspect the pads but the rear brakes will always make noise if it sets overnite once they have been used. if there is a rubber plug to look in there you wont need to pull the tire off or if its discs. as for the front brake its pry never had new fluid so pry a bad master cylinder. cheap insurance would be to drain all the fluid in the front and replace it and bleed after a gravity bleed/ push all the old nasty stuff out. you may get some brake pressure but if its been neglected too long it may be too late. also check front line for kinks as that could have added to the problem
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Post by GrumpyUnk on Sept 27, 2019 11:23:17 GMT -5
I would suggest removing the top of the fluid reservoir. Given pads are mentioned, I assume disk brakes. There is a port in the bottom of the reservoir that allows fluid to flow into the piston area of the brake master cylinder. If plugged, the fluid cannot get to the caliper piston area. Look for a tiny vent hole that is 'partway' along the axis of the piston. It can get plugged with what looks like oxidized aluminum. Use a probe or a small nail or pick to poke through. If successful, you will see bubbles and fluid flow when you operate the brake lever and move the piston. Once you get it cleaned, cycle the brake lever 10-20 times to circulate fresher fluid into the cylinder and free up the piston. You can also remove the lever pivot 'pin' or bolt(and nut) and remove the lever. You then have access to the end of the master cylinder piston, and the bore. Sometimes they can get plugged or sticky due to corrosion, which can be alleviated using some lubricant or potion such as WD-40. If you need to free the piston, again, cycle it 10-20 times to insure the lube has gotten down the bore and the piston will remain free to move. This kind of thing happens more with machines that have been parked too long.
tom
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