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P–21191
Operation & Maintenance Manual–42–
331/331E/334 Excavator
ENGINE LUBRICATION SYSTEM
Checking Engine Oil
Check the engine oil every day before starting the engine
for the work shift.
Open the tailgate and remove the dipstick (Item 1) [A].
Keep the oil level between the marks on the dipstick.
Use a good quality motor oil that meets the correct API
Service Classification. (See FUEL, COOLANT AND
LUBRICANTS Chart, Page 81.)
Replacing Oil And Filter
See the SERVICE SCHEDULE, Page 35 for the service
interval for replacing the engine oil and filter.
Route the drain hose our the tailgate and run the engine
until it is at operating temperature. Stop the engine.
Open the tailgate.
Route the drain hose out the tailgate. Remove the drain cap
(Item 2) [A]. Drain the oil into a container.
Recycle or dispose of used oil in an environmentally safe
manner.
Remove the oil filter (Item 3) [A] and clean the filter housing
surface.
Use a genuine Bobcat replacement filter element.
Put clean oil on the filter gasket. Install the filter and hand
tighten.
Install and tighten the oil drain cap.
Remove the fill cap (Item 4) [A].
Put oil in the engine. (See FUEL, COOLANT AND
LUBRICANTS Chart, Page 81.)
Install the fill cap.
Start the engine and let it run for several minutes.
Stop the engine. Check for leaks at the oil filter. Check the
oil level.
Add oil as needed if it is not at the top mark on the dipstick.
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