OPERATOR'S MANUAL

Preventive Maintenance Brake System
Medium Duty
(R05/09) Y53-6027 – 185 –
WARNING! Do not use any replacement part in
the brake system unless it conforms exactly to
original specifications. A nonconforming part in
your vehicle's brake system could cause a mal-
function resulting in an accident causing death
or personal injury. Sizes and types are so related
to one another that a seemingly unimportant
change in one may result in a change in how
well the brakes work for you on the road. If parts
do not work together properly, you could lose
control of your vehicle, which could cause a
serious accident.
WARNING! Do not work on the brake system
without the parking brake set and wheels
chocked securely. If the vehicle is not secured to
prevent uncontrolled vehicle movement, it could
roll and cause death, serious personal injury or
damage to the vehicle.
•Use wood blocks (4 in. X 4 in. or larger) against
the front and rear surfaces of the tires. Be sure
the vehicle cannot move.
Lubrication
Cam-actuated brake components such as anchor pins and
brake camshafts are subjected to high temperatures, and
must be lubricated with nonmelting, water resistant brake
grease meeting R–S Specification 0–616 (NLGI–Grade 1).
• Lubricate according to
Table 1, “Recommended Main-
tenance Intervals,” Page 154
.
WARNING! Do not apply too much lubricant to
brake components—lubricate sparingly. Exces-
sive amounts of lubricant could contaminate
brake linings, which could reduce brake effec-
tiveness and cause an accident resulting in
death or injury.
Brake and Slack Adjuster Lubrication
According to the interval, pressure lubricate the slack
adjuster and brake camshaft (bracket/tube). Two grease fit-
tings are provided for both the slack adjuster and camshaft
bracket/tube.
• Use standard chassis lubricant (meeting No. 1 grade
high temperature, water proof specifications).