A
P–21189
1
Diesel fuel or hydraulic fluid under pressure
can penetrate skin or eyes, causing serious
injury or death. Fluid leaks under pressure may
not be visible. Use a piece of cardboard or wood
to find leaks. Do not use your bare hand. Wear
safety goggles. If fluid enters skin or eyes, get
immediate medical attention from a physician
familiar with this injury.
W–2072–0496
Operation & Maintenance Manual–49–
331/331E/334 Excavator
HYDRAULIC SYSTEM (Cont’d)
Replacing The Hydraulic Oil
See the SERVICE SCHEDULE, Page 35 for the correct
service interval.
Retract the arm and bucket cylinders, lower the bucket to
the ground. Stop the engine.
Open the tailgate.
Remove the drain plug (Item 1) [A].
Drain the fluid into a container.
Recycle or dispose of the fluid in an environmentally safe
manner.
Install the drain plug (Item 1) [A].
Add fluid to the reservoir. (See FUEL, COOLANT AND
LUBRICANTS Chart, Page 81.)
Run the machine through the hydraulic functions. Stop the
engine. Check the fluid level and add as needed.
Always clean up spilled fuel or oil. Keep heat,
flames, sparks or lighted tobacco away from
fuel and oil. Failure to use care around
combustibles can cause explosion or fire
which can result in injury or death.
W–2103–1285
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