1985 Chevy Blazer Bleeding procedures

1985 CHEVROLET BLAZER
64,000 MILES • 6 CYL • 4WD • AUTOMATIC
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DRYGULCH
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Blazer S-10

Brakepedal has bled down to the floor while waiting at traffic lite. Same day I replaced master cylinder, bench bled first. bled the lines coming out of the cylinder,then the two bleeders on the antilock body. adjusted a;ll brakes. Pedal did bleed down first day. Now it is low but does not bleed down as much. Was that the righ bleeding procedure? What are the rubber cups protecting the proportional valve that is located downstream fron the master cyl?

Sincerely,

Roger lebish
Aug 14, 2010 at 3:37 PM
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RASMATAZ
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MANUAL BLEEDING

NOTE:When bleeding disc brakes, air may tend to cling to caliper walls. Lightly tap caliper, while bleeding, to aid in removal of air.

Fill master cylinder. Install bleeder hose to first bleeder valve to be serviced. See BLEEDING SEQUENCE table. Submerge other end of hose in clean glass jar partially filled with clean brake fluid.
Open bleeder valve 3/4-1 turn. Depress brake pedal slowly through full travel. Close bleeder valve and release pedal. Repeat procedure until flow of fluid shows no signs of air bubbles.
Fig. 1: Wheel Cylinder Bleeding Procedure When bleeding brake system manually, ensure bleeder valve is closed when brake pedal is released.
BLEEDING SEQUENCE
Before bleeding system, exhaust all vacuum from power unit by depressing brake pedal several times. Bleed master cylinder if equipped with bleeder screws. Bleed slave cylinder on vehicles equipped with remote mount power assist units. Bleed wheel cylinders and calipers in sequence. See BLEEDING SEQUENCE table.
BLEEDING SEQUENCE
ApplicationSequence
General Motors RR, LR, RF, LF
Aug 14, 2010 at 4:56 PM