Oshkosh JLG 400S, Service And Maintenance Manual

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SECTION 3 - CHASSIS & TURNTABLE
3-140 – JLG Lift – 3120895
Do not drain the oil when the engine is cold. As the oil
cools, suspended waste particles settle on the bottom of
the oil pan. The waste particles are not removed with the
draining cold oil. Drain the crankcase with the engine
stopped. Drain the crankcase with the oil warm. This
draining method allows the waste particles that are sus-
pended in the oil to be drained correctly.
Failure to follow this recommended procedure will cause
the waste particles to be recirculated through the engine
lubrication system with the new oil.
DRAINING THE ENGINE OIL
After the engine has been run at the normal operating
temperature, stop the engine. Turn the drain valve knob
counterclockwise in order to drain the oil. After the oil has
drained, turn the drain valve knob clockwise in order to
close the drain valve.
FILLING THE ENGINE CRANKCASE
1. Remove the oil filler cap. Refer to the Operation and
Maintenance Manual for more information on lubri-
cant specifications. Fill the crankcase with the cor-
rect amount of oil. Refer to the Operation and
Maintenance Manual for more information on refill
capacities.
UNDERFILLING OR OVERFILLING THE CRANKCASE WITH OIL
CAN CAUSE ENGINE DAMAGE.
TO PREVENT CRANKSHAFT BEARING DAMAGE, CRANK THE
ENGINE WITH THE FUEL OFF. THIS WILL FILL THE OIL FILTERS
BEFORE STARTING THE ENGINE. DO NOT CRANK THE ENGINE
FOR MORE THAN 30 SECONDS.
2. Start the engine and run the engine at "LOW IDLE"
for two minutes. Perform this procedure in order to
ensure that the lubrication system has oil and that
the oil filters are filled. Inspect the oil filter for oil
leaks.
3. Stop the engine and allow the oil to drain back to the
sump for a minimum often minutes.
4. Remove the oil level gauge in order to check the oil
level. Maintain the oil level between the "MIN" and
"MAX" marks on the oil level gauge.
Fuel Filter/Water Separator
FUEL LEAKED OR SPILLED ONTO HOT SURFACES OR ELECTRI-
CAL COMPONENTS CAN CAUSE A FIRE. TO HELP PREVENT POS-
SIBLE INJURY, TURN THE START SWITCH OFF WHEN CHANGING
FUEL FILTERS OR WATER SEPARATOR ELEMENTS. CLEAN UP
FUEL SPILLS IMMEDIATELY.
THE WATER SEPARATOR IS NOT A FILTER. THE WATER SEPARA-
TOR SEPARATES WATER FROM THE FUEL. THE ENGINE SHOULD
NEVER BE ALLOWED TO RUN WITH THE WATER SEPARATOR
MORE THAN HALF FULL. ENGINE DAMAGE MAY RESULT.
1. Open the drain at the bottom of the separator. Catch
the draining water in a suitable container. Properly
dispose of the drained water.
2. Close the drain.
THE WATER SEPARATOR IS UNDER SUCTION DURING NORMAL
ENGINE OPERATION. ENSURE THE DRAIN VALVE IS SECURELY
TIGHTENED TO HELP PREVENT AIR FROM ENTERING THE FUEL
SYSTEM.
1. Cap
2. Locking Ring
3. Element
4. Water Separator Bowl
5. Drain
Figure 3-85. Fuel Filter/Water Separator