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Fig. 2: Moving Quadrant on Drum Brake Adjuster (Festiva)
Courtesy of FORD MOTOR CO. FRONT AXLE BEARINGS Front bearing preload is adjusted during bearing replacement by changing preload spacer. See FRONT WHEEL BEARINGS under REAR AXLE BEARINGS With bearings installed, tighten NEW lock nut to 18-22 ft. lbs. (24-30 N.m) while rotating wheel. Slightly loosen lock nut so it can be turned TESTING POWER BRAKE UNIT Functional Test 1. Check master cylinder fluid level and hydraulic system for leaks. Place transaxle in Neutral or Park, turn ignition off and apply parking brake. Pump brake pedal several times to eliminate vacuum from system, and hold pedal in depressed position. 2. Start and idle engine. If vacuum system is functioning properly, pedal moves downward under constant foot pressure. If no pedal motion is felt, vacuum booster is not functioning properly. Go to next step. 3. Run engine for at least one minute and turn ignition off. Depress brake pedal several times. Booster is okay if pedal stroke is long at first and becomes shorter with each stroke. If stroke does not shorten, check for a damaged, restricted or improperly connected check valve 4. Restart engine. Depress and hold pedal down. Turn ignition off and wait 30 seconds. Booster is okay if pedal height remains unchanged. If pedal height changes, check for a damaged, restricted or improperly connected check valve or vacuum hose. Go to next step. 5. Connect a pressure gauge to master cylinder output line. Connect a vacuum gauge to booster and a pedal depression force gauge to brake pedal. Bleed air from pressure gauge. Start engine. When vacuum gauge reads 19.7 in. Hg, turn ignition off. Watch vacuum gauge 6. Restart engine. Apply and hold 44 lbs. (196 N) force to brake pedal. When vacuum gauge reading reaches 19.7 in. Hg, turn ignition off. Watch vacuum gauge for 15 seconds. Booster is okay if vacuum gauge reads 18.7-19.7 in. Hg. If vacuum gauge reads less than 18.7 in. 7. With engine stopped and vacuum gauge at zero, check pressure gauge. Apply 44 lbs. (196 N) force to brake pedal and check pressure gauge. Booster is okay if pressure gauge reads 256 psi (18 kg/cm 2 ). 8. Remove pedal force and start engine. When vacuum gauge reaches 19.7 in. Hg, apply 44 lbs. (196 N) force to pedal. Booster is okay if pressure gauge read 768 psi (54 kg/cm 2 ). Diagnosis If booster does not function properly, see Fig. 3 . NOTE: Axle lock nut on right side has left-hand threads. Always install NEW lock nut when removed. NOTE: Inspect all vacuum hoses for holes, collapsed areas and secure connections. Ensure all unused |