Changing The Engine Oil; Coolant Fill Procedure - Dual Fuel Engine - JLG 600SJ Service And Maintenance Manual

6. If the oil level is below the "ADD" mark, proceed to
Step 7 and 8 and reinstall the dipstick into the dip-
stick tube.
7. Remove the oil filter cap from the valve rocker arm
cover.
8. Add the required amount of oil to bring the level up
to but not over "FULL" mark on the dipstick.
9. Reinstall the oil fill cap to the valve rocker cover and
wipe away any excess oil.

Changing The Engine Oil

WHEN CHANGING THE OIL, ALWAYS CHANGE THE OIL FILTER.
CHANGE OIL WHEN THE ENGINE IS WARM FROM OPERATION AS
THE OILS WILL FLOW FREELY AND CARRY AWAY MORE IMPU-
RITIES.
To change the oil use the following steps:
1. Start the engine and run until it reaches normal
operating temperature.
2. Stop the engine.
3. Remove the drain plug and allow the oil to drain.
4. Remove and discard the oil filter and its sealing ring.
5. Coat the sealing ring on the filter with clean engine
oil and wipe the sealing surface on the filter
mounting surface to remove any dust, dirt and
debris. Tighten the filter securely (follow the filter
manufacturers instructions). Do not over tighten.
6. Check the sealing ring on drain plug for any dam-
age, replace if necessary, wipe the plug with a clean
rag, and wipe the sealing surface on the pan and
reinstall the pan plug. Do not over tighten.
7. Fill the crankcase with oil.
8. Start the engine and check for oil leaks.
9. Stop the engine and check the oil level to insure the
oil level is at "FULL".
10. Dispose of the oil and filter in a safe manner.
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SECTION 3 - CHASSIS & TURNTABLE

Coolant Fill Procedure - Dual Fuel Engine

DAMAGE TO THE ENGINE COULD OCCUR IF NOT PROPERLY
FILLED WITH COOLANT. LPG FUELED ENGINES ARE MOST
PRONE TO CREATING AN AIR LOCK DURING A COOLANT FILL
OPERATION DUE TO THE ELECTRONIC PRESSURE REGULATOR
(EPR) BEING THE HIGHEST POINT IN THE COOLING SYSTEM. AN
EPR THAT APPEARS TO HAVE FROST FORMING ON IT IS A SIGN
THAT THE ENGINE COOLING SYSTEM CONTAINS AIR. THE
APPEARANCE AND TEMPERATURE OF THE EPR SHOULD BE
MONITORED DURING THE COOLANT FILL OPERATION. A WARM
EPR IS AN INDICATION THAT THE COOLING SYSTEM IS PROP-
ERLY FILLED AND FUNCTIONING.
MAKE SURE ENGINE IS COOL BEFORE PERFORMING ANY MAIN-
TENANCE WORK.
1. Loosen the worm gear clamp on the coolant line
running into the EPR as shown below and remove
the hose from the EPR. Place a rag under the hose
to prevent coolant from running onto the engine/
machine.
– JLG Lift – 3-97