Maintenance Instructions
WARNING
To prevent property damage, personal injury,
and / or death, under no circumstances should
the spring brake section of the spring and brake
chamber be disassembled.
Disassembly will
release a powerful spring.
WARNING
To prevent property damage, personal injury,
and / or death, Brake Automatic Slack Adjusters
(ASAs) should not need to be manually adjusted
in service.
ASAs should not routinely have
to be adjusted to correct excessive push rod
stroke. Excessive stroke indicates that a problem
exists with the foundation brake, ASA, brake
actuator, other brake system components, or
their installation or adjustment.
In the event that a manual adjustment must be
made (although this should not be a common
practice),
a
service
appointment
and
full
foundation brake, ASA, and other brake system
component inspection must be conducted as
soon as possible to ensure the integrity of the
overall brake system prior to returning the vehicle
to service.
A regular schedule for periodic cleaning, lubrication, adjustment
and inspection should be established, based on the type
of vehicle operation.
It is difficult to predetermine an exact
maintenance interval (time or mileage), since vehicles will be
used in a wide variety of applications and conditions. If you
are uncertain of the proper schedule and procedures for your
vehicle, contact your International dealer.
Periodic checking of push rod travel or brake adjustment is
essential for good braking. Push rod travel should be checked
every service interval to determine if adjustment is necessary.
Brake chamber push rods on original equipment chambers now
incorporate an overstroke indicator (an orange paint marker
near the base of the push rod) to aid adjustment checks. If the
push rod is clean and the orange marker can be seen protruding
from the chamber when the brakes are applied, the brakes
require adjustment.
Slack adjusters should also be checked to ensure proper
operation of the adjuster mechanism at every interval. Push rod
travel should be less than the maximum allowed stroke without
brakes dragging.
Inspect brake linings every maintenance interval. When brake
shoes (or pads) are worn to within 1/16 inch (1.6 mm) of rivets
(or backing plates), as indicated by a line or other feature on the
edge of most brake shoes (or pads), brake shoes (or pads) must
be replaced.
This inspection or adjustment should only be performed by
qualified service personnel and must be in accordance with
instructions provided by the Service Manual.
NOTE: Do not overlook the brakes on the trailer either.
Brake condition on a trailer is just as important as the
tractor. Proper brake balance on trucks and tractor trailers
is essential for good braking.
209
Summary of Contents for ProStar+
Page 4: ......
Page 24: ...Foreword 12...
Page 38: ...Model Description 26...
Page 74: ...Controls Features Declination Zone Map 62...
Page 98: ...Controls Features Center Dash Panel Wing Panel 86...
Page 118: ...Controls Features 106...
Page 243: ...Maintenance Instructions 231...
Page 286: ...Maintenance Intervals and Specifications 274...
