D
Group 177 General
Safety Advice
You must read and understand the precautions and
guidelines in Service Information, Groups 1-9, “General
Safety Practices” before performing any of these
procedures.
Ask your supervisor for training, If you are not properly
trained and certified in any of these procedures.
DANGER
Never operate a diesel engine in an area where
hydrocarbon vapors (gasoline for example) are
present or are suspected to be present. Hydrocarbon
vapors can enter the air intake and make the engine
overspeed, causing severe damage and/or explosion
or fire. Serious personal injury or death can occur.
DANGER
Before working on a vehicle, set the parking brakes,
place the transmission in neutral, and block the wheels.
Failure to do so can result in unexpected vehicle
movement and can cause serious personal injury or
death.
DANGER
When entering and exiting the cab, use caution. Always
have a firm hand hold and/or stable foot position
before transferring weight to that position. Do not carry
anything when entering or exiting. Make sure the soles
of your shoes and the cab steps are free from dirt,
grease, oil or moisture before using the steps. Failure
to do so can result in a fall, and serious personal injury
or death may occur.
DANGER
If using a jack and/or jack stands, choose proper
fault-free equipment. Failure to do so can result in
equipment failures and personal injury or death may
occur.
DANGER
When operating a vehicle on streets and highways
during data collecting procedure, it is mandatory to
have a second person drive while a technician collects
the data. Inattention to driving may cause an accident
and injury or death.
WARNING
Clean up fuel spills immediately. Fuel leaked or spilled
onto hot surfaces or electrical components can cause
a fire with potential for serious personal injury.
WARNING
Always wear appropriate eye protection to prevent the
risk of eye injury due to contact with debris or fluids.
WARNING
Serious burns can result from contact with hot axle,
engine, or transmission oil. Take precautions when
draining the oil. Wear gloves and let the engine cool
down before draining.
WARNING
HOT ENGINE! Keep yourself and your test equipment
clear of all moving or hot engine parts. A hot engine
can cause serious burns or can permanently damage
test equipment.
WARNING
Never remove the cap on the expansion tank while the
engine is still hot. Wait until the coolant temperature is
below 50
C (120 F). Scalding steam and fluid under
pressure may escape and cause serious personal
injuries.
Note: During the Preventive Maintenance inspection,
check the condition of warning labels on the vehicle. If
a label is damaged or defaced to the point where the
message cannot be read, note on the inspection form to
have it replaced.
Note: Some vehicles are equipped with TEMP-A-START
(TAS), which can be readily identified by a dash mounted
switch with a TAS indicator. Vehicles equipped with this
option will perform an engine shutdown if the engine is
left idling for 10 minutes, or a dash shutdown if the key
switch is left in the ignition position for 10 minutes with the
engine running. For more information on TAS, refer to
the vehicle literature.
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