There have been so many posts concerning the proper bleeding of Powermasters, and so many troubles reported.
For reference, I'm attaching the original 1987 service manual pages (section 5D4) for the Powermaster, as a PDF file.
In particular, page 5D4-7 of part2 outlines :
Very few bleeding instructions I've read, mention this additional bleeding from the "booster tube and nut assembly".
Now, I haven't actually tried it, but I wonder if the many reports of incomplete or inadequate bleeding are caused by not doing this additional step ??
ADDED note: sorry, I'm having trouble attaching my PDF file (too big). That may make this post semi-useless.
For reference, I'm attaching the original 1987 service manual pages (section 5D4) for the Powermaster, as a PDF file.
In particular, page 5D4-7 of part2 outlines :
-- Loosen the booster tube and nut assembly from the casting boss figure 5 (Item 12).
-- Wait for brake fluid to gravity bleed from the loosened end of the tubing.
-- When fluid begins to flow, tighten tube nut to 17 N-m (13 Ibs. ft.). Check for leaks or flow back into reservoir.
-- Wait for brake fluid to gravity bleed from the loosened end of the tubing.
-- When fluid begins to flow, tighten tube nut to 17 N-m (13 Ibs. ft.). Check for leaks or flow back into reservoir.
Very few bleeding instructions I've read, mention this additional bleeding from the "booster tube and nut assembly".
Now, I haven't actually tried it, but I wonder if the many reports of incomplete or inadequate bleeding are caused by not doing this additional step ??
ADDED note: sorry, I'm having trouble attaching my PDF file (too big). That may make this post semi-useless.
