- If you need clarification, ask it in the comment box above.
- Better answers use proper spelling and grammar.
- Provide details, support with references or personal experience.
Tell us some more! Your answer needs to include more details to help people.You can't post answers that contain an email address.Please enter a valid email address.The email address entered is already associated to an account.Login to postPlease use English characters only.
Tip: The max point reward for answering a question is 15.
Get a friend...now use a hand vacuum pump on each line at the caliper... use a long piece of tubing so as to NOT get fluid into your vacuum pump..have your friend pump the brakes while you pull vacuum ... this should get the fluid moving..(UNLESS there is a problem "upline") ... next - Do the pistons in ALL 4 CALIPERS WORK?? Do they actually move in and out..verify this!! .. I have seen them stick in new calipers and cause the headaches you are describing...DO NOT PUT PRESSURE ON THEM WITHOUT SOMETHING BETWEEN THE PADS.. YOU WILL BLOW THE PISTONS OUT OF THE CALIPERS!!..
- NEXT - ...try opening all 4 bleeders on the calipers and letting them sit... sometimes gravity works best...(WHY .. ??)... if this doesn't work, use a hand vacuum pump on each caliper.. -- ??
This is a common thing with single disc brakes. What ever side the brake caliper is on the bike will pull slightly to that side. If the caliper is on the left side it will pull slightly to the left if on the right side it will pull slightly to the right. You can check your tire - it may be cupped. The caliper might be grabbing a little to much.
There should be a small set screw you can loosen by hand and adjust the face of the dial to zero with the jaws closed....this is typical of most calipers...it allows you to zero the dial on a given thickness of material and only read variations based on that thickness.
The dial and needle are not aligned properly. I have several calipers (all vernier) which were past down to me from my father. Some are almost 75 years old and still measure +/- 1000th! I'd go out and get a good old fashioned caliper.
The pins must be driven out spray liquid wrench on them an let stand for a few minutes these pins should be replaced with new ones if they are badly rusted, you don't need to disassemble the caliper just drive out the pins. It is a good idea to clamp the caliper in a bench vise to drive out the pins, use the appropriate size drift or center punch to achieve this.
sounds like you're foot pressure is off, foot pressure and stitch length are the 2 main things that would cause "drifting" (they're also knobs that little hands could of moved) Also your little one quite possibly could of spun these knobs several times so keep that in mind while dialing your machine back to good health