F 250 2WD Pickup V8-7.3L DSL (1990)
J6 - Front Wheel Bearing Adjustment
^ Check front wheel bearings for proper adjustment.
^ Are bearings properly adjusted?
YES -- Check rear brake adjustment and adjust if necessary. Repeat Test J1. See: J - Pedal Is Low or Feels Spongy/J1 - Verify Condition
NO -- Adjust front wheel bearings. Repeat test J1. See: J - Pedal Is Low or Feels Spongy/J1 - Verify Condition
K - Brake Pedal Effort Is Excessive
^ Detach booster pushrod from pedal pin and depress pedal fully.
^ Is the brake pedal still difficult to depress?
YES -- Service or replace brake pedal linkage.
NO -- Check booster and vacuum availability.
N1 - Fluid Level Check
^ Check the fluid level in the master cylinder reservoir.
^ Is the reservoir low or empty?
YES -- Fill the reservoir to the correct level. Go to N2. See: N - Brake Master Cylinder Bypass Condition Check/N2 - Fluid Level Check,
Brakes Applied
NO -- Go to N2. See: N - Brake Master Cylinder Bypass Condition Check/N2 - Fluid Level Check, Brakes Applied
N2 - Fluid Level Check, Brakes Applied
^ Apply brakes very slowly several times while observing the fluid level in the master cylinder reservoir.
NOTE: Master cylinder bypass typically occurs when the brakes are applied very slowly and line pressures are low. A "hard" apply can flare the
internal lip seals out and result in a passing test where the concern may in fact be valid.
^ Does the level remain the same?
YES -- Go to N3. See: N - Brake Master Cylinder Bypass Condition Check/N3 - Wheel Turning Torque Check, Front Wheels
NO -- Master cylinder checks OK.
N3 - Wheel Turning Torque Check, Front Wheels
^ Place transmission in NEUTRAL.
^ Raise front wheels off of ground.
^ Apply 445 N (100 lb) evenly over a period of 30 seconds to the brakes and hold for approximately 15 seconds.
^ While holding brakes, exert 101 N (75 lb) rotational force to front wheels.
^ Does either wheel rotate?
YES -- Service master cylinder as required.
NO -- Front chamber of master cylinder checks OK. Go to N4. See: N - Brake Master Cylinder Bypass Condition Check/N4 - Wheel
Turning Torque Check, Rear Wheels
N4 - Wheel Turning Torque Check, Rear Wheels
^ Place transmission in NEUTRAL.
^ Raise rear wheels off of ground.
^ Apply 445 N (100 lbs) evenly over a period of 30 seconds to the brakes and hold for approximately 15 seconds.
