User's Manual

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.

Troubleshooting