MAINTENANCE AND LUBRICATION
4-17
Brake System Maintenance
WARNING
General
A daily general inspection will reveal the most common
problems found in the spring brake system. This
inspection should include the following:
1.
Check air hoses for chafing, bends, kinks, or
damaged fittings. Replace defective hoses.
2.
Check the brake system for loose, missing,
deformed, or corroded fasteners. Replace and
tighten defective hardware.
3.
Check brake linings for excessive wear or distortion.
4.
Drain air reservoir daily. A drain cock on the bottom
of each air reservoir vents the tank to drain collected
water and oil. If held open, air pressure in the tanks is
relieved, causing the emergency or parking brakes to
be applied
Figure 4-10: Drain Cock Locations
1.
When crawling under the semitrailer is
necessary, chock all wheels of the trailer and
tractor. When jacking is necessary, chock all
wheels and support the semitrailer
undercarriage with jack stands sufficient to
withstand the weight of the semitrailer and
load. Failure to take adequate safety
measures may result in serious personal
injury or death.
2.
Use great care if wheels or brake drums must
be handled. They may be very hot and can
cause serious burns.
DRAIN COCK
mem950-51-drain
