User's Manual
30
WARNING: Refer to Safety Instructions. The vehicle manufacturer's instructions must also be followed.
Troubleshooting
Symptoms Actions
No or low braking effect • Are brake pads worn away?
• Is brake pad to disc clearance OK?
• Is brake disc OK?
• Is air pressure in brake chamber correct? (Measure with pressure gauge at brake chamber.)
• Change pads.
• Carry out initial adjustment + perform function test.
• Change brake disc (See vehicle manufacturer's instructions.)
• Take action in accordance with vehicle manufacturer's instructions.
Brake drags/does not release • Does air pressure in brake chamber remain after brake has been released? (< 1 psi OK)
completely • Is spring brake (if fi tted) completely released when parking brake is off?
• Is brake pad to disc clearance OK?
• Are pads able to move freely in carrier?
• Is sliding function of brake caliper OK?
• Is wheel bearing or wheel bearing clearance OK?
• See vehicle manufacturer's instructions for troubleshooting air system.
• Carry out initial adjustment + perform function test.
• Remove pads, clean pads, carrier and caliper.
• Check slide pins/bushings.
• See vehicle manufacturer's instructions.
Vehicle pulls to one side • Are pads worn out on one side?
• Is brake pad to disc clearance OK?
• Are pads able to move freely in carrier?
• Is the pressure the same in both brake chambers of the axle in braking?
(Measure with pressure gauge at the brake chambers.)
• Replace pads.
• Carry out initial setting and perform function test.
• Remove pads, clean pads, carrier and caliper.
• See vehicle manufacturer's instructions for troubleshooting air system.
Noise/vibrations from the • Are pads about to move freely in carrier?
brake • Are the disc brake and its components attached to the axle as per specifi cation?
• Non-permitted cracks/tracks in brake disc?
• Is brake disc runout within spec?
• Remove pads, clean pads, carrier and caliper.
• See section on "Replacing slide pins and bushings".
• See vehicle manufacturer's instructions for troubleshooting air system.
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Troubleshooting










