Meritor MM-2075 Maintenance Manual page 26

9 Troubleshooting
Condition Possible Causes
Brake pedal Excessive rotor runout or thickness
pulsation variation
Worn or damaged wheel bearing
Rotor condition
Steering wheel Excessive rotor runout or thickness
vibration during variation
braking
Worn or damaged wheel bearing
Tire damage
Steering/suspension related condition
Steering wheel Uneven tire pressure
pulls during
Mismatched tire size
braking
One caliper not operating properly
Mismatched brake friction
Brake lining contaminates
Wheel bearings worn on not adjusted
correctly
Worn suspension components
Incorrect alignment
Steering pulls Uneven tire pressure
when driving
Mismatched tire size
Brake caliper is not releasing
Wheel bearings worn on not adjusted
correctly
Worn suspension components
Incorrect alignment
MM-2075 / Revised 09-23
Page 22
Check for
Check braking surfaces with dial
indicators
Wheel end play
Corrosion on braking surface
Check braking surfaces with dial
indicators
Wheel end play
Inspect tire for bumps, blemishes and
balance
Steering linkages, king pin, steering
gear
Check tire pressure
Tires are the same size
Verify caliper applies and release
Verify caliper not damaged
Verify interference condition
obstructing operation
Verify fluid delivery to caliper - no
obstructions
Verify both calipers have the same
friction
Check brake pads and rotor surfaces
Check wheel end play
Check suspension components
Check alignment
Check tire pressure
Tires are the same size
Fluid not releasing from caliper
Check if caliper is holding pressure
Verify caliper not damage
Verify interference condition
obstructing operation
Check wheel end play
Check suspension components
Check alignment
Copyright Meritor, Inc., 2023
Correction
Replace rotor.
Replace wheel bearing.
Replace rotor.
Replace rotor.
Replace wheel bearing.
Replace as needed.
Replace as needed.
Add air as needed.
Replace tire with appropriate size.
See Caliper on page 19.
Replace as needed.
Correct interference condition.
Inspect hydraulic system.
Replace brake pads as needed with
OEM brake pads.
Clean rotor. Replace axle set of pads
with new brake pads. Do not attempt
to clean brake pads.
Replace as needed.
Replace as needed.
Correct alignment.
Add air as needed.
Replace tire with appropriate size.
Possible collapsed brake line.
Review brake system operation.
Replace as needed.
Correct interference condition.
Replace as needed.
Replace as needed.
Correct alignment.
(16579)
Printed in USA