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What is the correct way to bleed the brakes w/o a pressure bleeder and with my wifes foot?
Put a piece of 2x4 under the pedal so the piston seals can't get pushed into uncharted (possibly rusty, pitted areas of thr bore.
Opinions vary on the pedal method. I was taught to : 1- open bleeder, 2- press pedal and hold, 3- close bleeder, 4- let pedal up (repeat endlessly).
Before you start bleeding, go around and make sure you can open each bleeder. A frozen or broken bleeder half-way thru the job takes a lot of the fun out of it. While doing this bleeder check, you can also expell much of the old fluid in the caliper by depressing the pistons with bleeder open and piped to your drain container.
Since the 240 has two separate hydraulic systems, the currently recommended sequence bleeds each system separately.
The upper two piston chambers on the front calipers form an inverted "U", with a single bleeder at the highest point. The lower two piston chambers form an upright "U", with bleeders at the two high points. (See illustrations in Bentley, p 500-1 and Haynes, p 9-13)
Bleed Sequence:
Either A or B can be done first:
System A:
1) Left rear
2) Left front - Upper piston chambers (single bleeder, top)
3) Right front - Upper piston chambers (single bleeder, top)
System B:
4) Right rear
5) Right front - Lower piston chambers (inner and outer bleeders, either first)
6) Left front - Lower piston chambers (inner and outer bleeders, either first)
ALSO — When opening the lines at the BJB, block the brake pedal down about 2". That way no fluid will leak from the MC.
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Bruce Young
'93 940-NA (current) — 240s (one V8) — 140s — 122s — since '63.
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