Ford Mercury Colony 1968 - Page 15

PART 2-1 — General Brake Service
2-7
POSSIBLE CAUSES OF TROUBLE
Shoe and Lining Knock-back after Violent Cornering or Rough Road
Travel
Shoe and Lining Assembly not Properly Seated or Positioned
Leak or Insufficient Fluid in System or Caliper
Loose Wheel Bearing Adjustment
Damaged or Worn Caliper Piston Seal
Improper Master Cylinder Push Rod Adjustment
Excessive Rotor Runout or Out of Parallel
Incorrect Tire Pressure
Frozen or Seized Pistons
Brake Fluid, Oil or Grease on Linings
Shoe and Lining Worn Below Specifications
Proportioning Valve Malfunction
Booster Inoperative
Caliper Out of Alignment with Rotor
Loose Caliper Attachment
Metering Valve Seal Leaks
Excessive Clearance Between Shoe and Caliper or Between Shoe
and Splash Shield
Shoe Hold Down Clips Missing or Improperly Positioned
Operator Riding Brake Pedal
Scores in the Cylinder Bore
Corrosion Build-Up in the Cylinder Bore or on the Piston Surface
Bleeder Screw Still Open
Caliper Out of Parallel with Rotor
One Section Dual Brake System Is Inoperative
Differential Pressure Valve Is not Centered
Wiring to Warning Lamp Switch Is Grounded
Warning Lamp Switch Is Grounded
Warning Lamp Is Burned Out
Warning Lamp Switch Has an Open Circuit
Warning Lamp Switch Is Inoperative
Wiring to Warning Lamp Has Open Circuit
TROUBLE SYMPTOMS
Excessive
Pedal
Travel
X
X
X
X
X
X
X
Brake Roughness or Chatter (Pedal
Pumping)
X
X
X
Excessive
Pedal
Effort
X
X
X
X
X
X
X
Pull
X
X
X
X
X
X
X
X
Rattle
X
X
X
Brakes
Heat
Up During
Driving
and Fail to
Release
X
X
X
Leaky
Wheel
Cylinder
X
X
X
Grabbing
or
Uneven
Braking Action
X
X
X
X
X
X
X
No
Braking Effect
When
Pedal Is Depressed
X
X
X
X
Brakes
for the
Respective
System
Do
Not
Apply
X
Pedal Gradually Moves Toward
Floor
or
Dash
Panel
X
X
Warning Lamp
Stays
Lit.
X
X
X
X
Warning Lamp
Does
Not
Light
X
X
X
X
. 9—Disc Brake Trouble Symptoms and Possible Causes