Brake problem - flexi lines

Hello,

Trying to bleed the brakes on my series 3 88inch ('77) but the pedal won't press firm until pumped two or three times. Bled through four or five times with no air coming out on final three bleeds at all. Ive searched on here and checked what's been said / advised and I'm left unsure on the flexible brake lines - I keep reading they can bulge thus absorbing some of the pressure meaning a poor pedal. Got someone who to pump brakes whilst I felt and watched both the front (and single rear) flexi lines. I couldn't see any bulging but the lines did twist / rotate slightly when under load, I.e you could see the pipes take up the pressure. Offside front seemed to 'twist' more than nearside - is this normal?? Should the flexi pipes show any sign of movement when the brake pedal is applied? Lines are about four years old, I know it seems an odd question and I have searched on here a lot ref bleeding but cannot find a description of said bulging or how the flexi pipes should look in normal operation.

Many Thanks - she's driving me mad with these brakes now!

Matt

I would expect the line to move slightly but not bulge. If the pedal goes firm after a couple of pumps, it still suggests air.
Series brakes are fiddlely because of the nipple position. If you bleeding manually, then consider an easibleed or mityvac (other types are available).

It would take a large bulge in the line to absorb two or three presses of the pedal, I think you still have air in the line. Try wait and see method, that is just open a nipple and wait until until fluid runs clear of bubbles then do the other three. [5 min's at most per corner]

have you by any chance changed your brake shoes i seem to have had a lot recently with the spring incorrectly fitted had it on a lightweight i bought recently doing what yours is replaced all the hydraulics still the same then found the previous owner had replaced the shoes and pulled the springs across both shoes like on modern motors instead of from the steady post to the opposite shoe as it should on a landy series not obvious when you first look only found it when i decided to replace the shoes in desperation having done everything else.note the vehicle was bought knowing it had a brake problem

Have you got free play at the master cylinder ie when pedal up master cylinder should have a couple of mm play on pushrod.
There is a valve at the resevoir end that needs to be able to open when pedal at rest.

As well as the good advice given above, have you got the shoes adjusted up correctly?
Is the adjuster touching the peg correctly ? Most issues I see with series brakes are down to previous owners fitting something incorrectly. I always gravity bleed as suggested by Tottot.