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XL-SA20018UM-en-US Rev H · 2017-12-14 · Amendments and Errors Reserved · © SAF-HOLLAND, Inc., SAF-HOLLAND, HOLLAND, SAF, and logos are trademarks of
SAF-HOLLAND S.A., SAF-HOLLAND GmbH, and SAF-HOLLAND, Inc.
Torque Specifications
PROBLEM
POSSIBLE CAUSE
POSSIBLE REMEDY
Brakes will not release
Disc brake caliper bound up
Lubricate or replace brake caliper
Brake hoses restricted
Replace hoses
Brake control valve restricted/inoperable
Repair/replace control valve
Brake out of adjustment
Adjust brake/repair or replace automatic adjustment device as necessary
Damaged brake chamber
Replace brake chamber
Damaged brake assembly
Replace or repair brake assembly
Supply air interrupted
Open glad hand cut-out cock or push brake control valve in
Supply line improperly coupled
Properly couple supply air line
Brake pads frozen to rotor in cold weather
Warm brakes
No brakes or insufficient brake
performance
Service air interrupted
Open glad hand cut-out cock
Service air line improperly coupled
Properly couple service air line
Brake hoses restricted
Relieve restriction or obstruction or replace hoses
Brake control valve restricted/inoperable
Repair/replace control valve
Brake out of adjustment
Adjust brake/repair or replace automatic adjustment device as necessary
Damaged brake chamber
Replace brake chamber
Damaged brake assembly
Replace or repair brake assembly
Dragging Brakes/Slow brake
application or release timing
Brake hoses restricted
Relieve restriction or obstruction or replace hoses
Brake control valve restricted/inoperable
Repair/replace control valve
Brake out of adjustment
Adjust brake/repair or replace automatic adjustment device as necessary
Damaged brake chamber
Replace brake chamber
Damaged brake assembly
Replace or repair brake assembly
Dog Tracking
Axle not properly aligned
Align axle
Slider assembly racked or not aligned properly Repair or replace slider assembly
Frame bent or not aligned properly
Repair or align frame
Damaged suspension component
Repair or replace suspension component
Bent axle
Replace axle
Uneven tire wear
Improper tire inflation
Inflate tire to proper pressure
Loose wheel stud nuts
Inspect for and repair any resultant wheel end damage and
tighten properly
Improper wheel bearing adjustment
Inspect for and repair any resultant wheel end damage and
adjust properly
Axle not properly aligned
Align axle
Slider assembly racked or not aligned properly Repair or replace slider assembly
Frame bent or not aligned properly
Repair or align frame
Damaged suspension component
Repair or replace suspension component
Bent axle
Replace axle
Mismatched tire sizes
Properly match tire sizes
Unequal brake balance or timing
Repair brakes as necessary
Overly aggressive braking
Instruct/train driver in proper brake use
High speed turns
Instruct/train driver in proper vehicle speeds
High level of side scrub
Instruct/train driver in proper vehicle maneuvering
Anti-Lock Brake System malfunction
Refer to ABS manufacturer’s service literature
18. Troubleshooting Chart
(SAF-HOLLAND
®
suspensions equipped with disc brake axles)