1996 Ford F150 brake problems

1996 FORD F-150
185,000 MILES • V8 • 4WD • AUTOMATIC
Avatar
FORDTRUCKS
problems bleeding brakes. can bleed brakes hard while truck isnt running but as soon as i start it pedal goes soft New parts master cyclinder,and brake boster any ideas! also so you know im using brake bleeding pump with clear lines and no air is coming out.[img:41b2d1cd80]http://www.2carpros.com/forum/automotive_pictures/564143_96_ford_1.jpg[/img:41b2d1cd80]
Aug 22, 2010 at 4:20 AM
Advertisement
Avatar
RASMATAZ
  • ✓ASE Certified Mechanic
  • 75,992 POSTS
  • ASE Certified Mechanic
Before bleeding system, remove all vacuum from power unit by depressing brake pedal several times. Bleed master cylinder first, followed in sequence by rear wheel cylinders, anti-lock system components (if equipped) and calipers. See BLEEDING SEQUENCE table. Did you adjust the brake booster push rod when you put the new one on? If not do below VACUUM POWER BOOSTER PUSH ROD Push rod has an adjustment screw to maintain correct distance between booster push rod and master cylinder piston. If push rod is adjusted too long, it prevents master cylinder piston from completely releasing hydraulic pressure, causing brakes to drag. If push rod is adjusted too short, it causes excessive pedal travel and an undesirable groaning noise in booster area. Remove master cylinder to access push rod. To check screw adjustment, fabricate a gauge. See Fig. 7. With engine running, place gauge against master cylinder mounting surface of booster. Adjust push rod screw by turning it until end of screw just touches inner edge of gauge slot.


https://images.2carpros.com/forum/automotive_pictures/12900_push_rod_1.jpg

Good Luck
Aug 22, 2010 at 4:39 AM
Join 2CarPros for free, one of the most advanced car repair communities on the internet. From first-time drivers to seasoned mechanics, everyone is welcome to reply, share details, and get better answers. You can add a temporary image or video first; uploads are limited to 20 MB.
Ask a Free Question
Repair Safety Notice: This information is for general instructional purposes only. Vehicle repair can be dangerous. Verify all information, follow manufacturer service procedures, use proper tools and safety equipment, and consult a qualified repair shop when needed.