Brake Pipe Seals

[Peter Brooks]

When fitting the little rubber seals onto the ends of the brake pipe which connects the front callipers, should they be flush with the end of the pipe or should the pipe protrube from the seals with the seal resting against the small bulge in the pipe?
I have fitted new seals this am and one side is still weeping through the top of the bolt without any pedal pressure.
Am I m issing something?

[callum]

The latter. The end of the pipe should protrude from the seal slightly.

Rgrds
Callum

[Ken Hanna]

Peter,
I hope you haven't over-tightened the nut(s).
The recommended torque for those brake pipe union nuts is only 6 lb.ft, lower if the threads are lubricated...

Ken

[Peter Brooks]

Callum and Ken thank you for your advice.

Ken
as I have not got a torque device that will fit the pipe nuts, can I take it that 6lbs of torque is probably about what is described as "just nipping them up" rather than tightening them down?
thanks
Peter

[Ken Hanna]

Peter,
'just nipping' fits the bill, although it's probably worth noting that since 'torque = force x distance', it's 6 lb.ft. which is the nominal dry torque...

If they've been overtightened, not only is the seal compressed too much, but the pipe can be wedged into the caliper, making removal of the pipe extremely difficult.

Ken

Callum and Ken thank you for your advice.

Ken
as I have not got a torque device that will fit the pipe nuts, can I take it that 6lbs of torque is probably about what is described as "just nipping them up" rather than tightening them down?
thanks
Peter

[Peter Brooks]

Ken

Once again thank you for your help and advice.
I have ordered a new connecting pipe and will fit it once it arrives, taking great care to just nip it up and avoid over tightening it.
Thanks

Peter

[Peter Brooks]

Finally got around to sorting the problem ut this weekend.
When I got the old transfer pipe off I found a fracture just above the bulge.
New pipe fitted, brakes bled and all is well
Once again thanks for the advice
Peter