JLG 660SJ Service Manual - Manual (Page 123)

SECTION 3 - CHASSIS & TURNTABLE
3121298 – JLG Lift – 3-79
Changing Engine Oil
ALWAYS CHANGE OIL FILTER WHEN CHANGING OIL. CHANGE OIL WHEN
ENGINE IS WARM FROM OPERATION. OILS WILL FLOW FREELY AND CARRY
AWAY MORE IMPURITIES.
To change oil use the following steps:
1. Start engine and run until it reaches normal operating
temperature.
2. Stop engine.
3. Remove drain plug and allow oil to drain.
4. Remove and discard oil filter and sealing ring.
5. Coat sealing ring on new filter with clean engine oil and
wipe engine filter mounting surface to remove contami-
nation. Tighten filter securely (follow filter manufactur-
ers instructions). Do not over tighten.
6. Check sealing ring on drain plug for damage. Replace if
necessary. Pipe plug and oil pan sealing surface with a
clean rag. Reinstall plug. Do not over tighten.
7. Fill crankcase with oil.
8. Start engine and check for oil leaks.
9. Stop engine and check oil level is at "FULL".
10. Dispose of oil and filter in a safe manner as required by
local regulations.
Coolant Fill Procedure - Dual Fuel Engine
HOT ENGINE AND COMPONENTS CAN CAUSE SEVERE BURNS. MAKE SURE
ENGINE IS COOL BEFORE PERFORMING MAINTENANCE.
DAMAGE TO ENGINE CAN 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 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 THE ENGINE COOLING SYSTEM CON-
TAINS AIR. APPEARANCE AND TEMPERATURE OF THE EPR SHOULD BE MONI-
TORED DURING COOLANT FILL OPERATION. A WARM EPR IS AN INDICATION
THAT THE COOLING SYSTEM IS PROPERLY FILLED AND FUNCTIONING.
1. Loosen worm gear clamp on coolant line running to EPR
as shown below. Remove hose from EPR. Place a rag
under hose to prevent coolant from running onto
engine/machine.
2. Remove radiator cap. Fill radiator with coolant until
coolant starts to appear from previously removed hose
at the EPR. Reinstall hose back on EPR and continue to
fill radiator with coolant.
3. With radiator cap still removed, start engine and run
until thermostat opens at 170° F (77° C), which can be
checked using the JLG handheld analyzer.
WHILE ENGINE IS RUNNING, AIR AND/OR STEAM MAY BE PRESENT COMING
FROM THE RADIATOR. THIS IS NORMAL.
4. Run engine for five minutes after it has reached operat-
ing temperature. Shut off engine and continue to step 5.