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I've seen that "all 3 at once" method in some very old Volvo green books (the only green books I have), but I prefer the sequence given in the Bentley and Haynes manuals.
The sequence described below bleeds each of the two separate hydraulic systems separately—whereas opening all 3 bleeders on a front caliper involves both of the two systems at the same time — which makes no sense to me.
Since the 240 has two separate hydraulic systems, the currently recommended sequence (below) bleeds each system separately.
Note that the upper two piston chambers on the front calipers form an inverted "U", with a single bleeder at the highest point. While the lower two piston chambers form an upright "U", with bleeders at the two high points.
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)
--
Bruce Young
'93 940-NA (current) — 240s (one V8) — 140s — 122s — since '63.
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