c. Welds: Look for loose or chipped paint, rust, or gaps where parts are welded together. If you find a bad weld,
report it to unit maintenance.
d. Electrical wiring and connections: Look for cracked or broken insulation, bare wires, and loose or broken
connections. Tighten loose connectors and make sure the wires are in good shape.
e. Hoses and fluid lines: While doing your PMCS, look for wear, damage, and leaks in all hoses and fluid lines.
Make sure clamps and fittings are tight. Wet spots mean leaks. A stain around a fitting or connector can mean a
leak. Look for these signs. If a leak comes from a loose fitting or connector that can be easily fixed, tighten it
using the two wrench method. If you can't fix it easily or if a hose or line appears broken or worn, report it to unit
f. Mounted accessories: Check that mounted accessories are secure and in place before you begin to operate your
Keep all of the general checks in mind every time you do your PMCS. This will
help you spot trouble before it starts. It will also help you and your unit's unit
maintenance to keep your semitrailer operational. In time, spotting possible
trouble will become automatic.
g. When you check for GOOD CONDITION: You look at the item to see if it is safe and serviceable.
h. When you check for CORRECT ASSEMBLY OR STOWAGE: You look at the item to see if it is there, installed
right, and properly secured.
i. The PREVENTIVE MAINTENANCE table starts on page 2-20. It is set up so that you can make your Before
operation checks as you walk around the semitrailer.
j. When you do your PREVENTIVE MAINTENANCE, look for items that appear in the blocks, "Equipment is not
ready". If any of these faults are noted, do not operate your semitrailer until the repairs are made.
SPECIAL INSTRUCTIONS (PMCS)
a. It is necessary for you to know how fluid leakage affects the status of equipment. The following are definitions of
the types/classes of leakage to help determine the status and condition of the semitrailer parts. Learn them and
be familiar with each type of leak. Remember - when in doubt, notify your supervisor.
b. Equipment operation is allowable with minor leakage (Class I or Class II). Consideration must be given to the
fluid capacity in the items being checked/inspected. When in doubt, notify your supervisor.