Doosan DX138LC Shop Manual page 30

Remember that soil after heavy rain, blasting or after
earthquakes, is weakened.
Newly laid earth and the soil near ditches is typically loose.. It
can collapse under the weight of vibration of your machine and
cause your machine to tip over.
Install the head guard (FOPS) if working in areas where there is
a danger of falling rocks.
Checks Before Starting Engine
Every day before starting the engine for the first time, carry out
the following checks. If these checks are not carried out
properly, there is a danger of serious injury.
Remove all wood chips, leaves, grass, paper and other
flammable materials accumulated in the engine compartment
and around the battery. They could cause a fire. Remove any
dirt from the window glass, mirrors, handrails, and steps.
Do not leave tools or spare parts laying around in the operator's
cabin. The vibration of the machine when traveling or during
operations can cause them to fall and damage or break the
control levers or switches. They may also get caught in the gap
of the control levers and cause the work equipment to
malfunction or move dangerously. This may lead to unexpected
accidents.
Check the coolant, fuel, and hydraulic tank oil levels, and check
for clogged air cleaner and damage to the electrical wiring.
Adjust the operator's seat to a position where it is easy to
operate the machine, and check the seat belt and mounts for
damage and wear.
Check the operation of the gauges and the angle of the mirrors,
and check that safety lever is in "LOCKED" position.
If any abnormalities are found in the above checks, carry out
repairs immediately.
Engine Starting
Walk around your machine before getting in the operator's
cabin. Look for evidence of leaking fluid, loose fasteners,
misaligned assemblies or any other indications of possible
equipment hazard.
All equipment covers and machinery safety guards must be in
place, to protect against injury while the machine is being
operated.
Look around the work site area for potential hazards, people or
property that could be at risk while operation is in progress.
NEVER start the engine if there is any indication that
maintenance or service work is in progress, or if a warning tag is
attached to controls in the cabin.
A machine that has not been used recently, or is being operated
in extremely cold temperatures, could require a warm-up or
maintenance service before start-up.
Track Excavator Safety SP002984
Page 23