JLG 500RTS ANSI Service Manual - Manual (Page 44)

SECTION 2 - PROCEDURES
2-28 – JLG Sizzor – 3120696
2.24 SPARK ARRESTOR MUFFLER
The multiple discs on these mufflers will require frequent
cleaning if used with oily or sooty exhaust, such as a die-
sel engine, or on malfunctioning engines, as evidenced by
visible exhaust.
2.25 DUAL FUEL/LPG SYSTEM
IT IS POSSIBLE TO SWITCH FROM ONE FUEL SOURCE TO THE
OTHER WITHOUT ALLOWING THE ENGINE TO STOP. EXTREME
CARE MUST BE TAKEN AND THE FOLLOWING INSTRUCTIONS
MUST BE FOLLOWED.
Changing From Gasoline to LP Gas
1. Start engine from ground control station.
2. Open hand valve on LP gas supply tank by turning
valve counterclockwise.
BE SURE ALL GASOLINE IS EXHAUSTED BEFORE SWITCHING
TO LP GAS.
3. While engine is operating, place the three position
LPG/GASOLINE switch at ground control station to
center OFF position. Allow engine to operate, with-
out load, until engine begins to stumble from lack of
gasoline.
4. As engine begins to stumble, place switch to LPG
position, allowing LP fuel to be sent to the fuel regu-
lator.
Changing From LP Gas to Gasoline
1. With engine operating on LP under a no-load condi-
tion, throw LPG/GASOLINE switch at ground control
station to GASOLINE position.
2. If engine stumbles because of lack of gasoline,
place switch to LPG position until engine regains
smoothness, then return switch to GASOLINE posi-
tion.
3. Close hand valve on LP gas supply by turning clock-
wise.
Using Liquid Petroleum (LP) Gas
CLOSE FUEL VALVE ON TANK WHEN PARKING SIZZOR LIFT
MORE THAN MOMENTARILY.
WHEN REFUELING LPG POWERED SIZZOR LIFTS, ALWAYS FOL-
LOW MANUFACTURERS SPECIFICATIONS AND/OR APPLICABLE
REGULATIONS.
1. If machine is to be left overnight or longer, it must be
parked outside or the LPG tank removed and stored
outside.
2. LPG is extremely flammable. No smoking.
3. Only trained and authorized personnel are permitted
to operate filling equipment.
4. Fill LPG tanks outdoors. Stay at least 50 ft (15 m)
from buildings, motor vehicles, electrical equipment
or other ignition sources. Stay at least 15 ft (4.5 m)
from LPG storage tanks.
5. During transfer of LPG, metal components can
become very cold. Always wear gloves when refilling
or changing tanks to prevent freeze burns to skin.
6. Do not store LPG tanks near heat or open flame. For
complete instructions on the storage of LPG fuels,
refer to ANSI/NEPA 58 & 505.
DO NOT USE AN LPG TANK THAT IS DAMAGED. A DAMAGED
TANK MUST BE REMOVED FROM SERVICE. FROST ON THE SUR-
FACE OF A TANK, VALVES, OR FITTINGS INDICATES LEAKAGE.
A STRONG ODOR OF LPG FUEL CAN INDICATE A LEAK.
2.26 FREEWHEELING FEATURE
To Disengage Torque Hubs (Freewheel)
1. Chock wheels securely.
2. Disengage (reverse) disconnect caps on drive
torque hubs by removing two attaching capscrews,
turning cap around, then reinstalling and tightening
capscrews.
3. If desired, remove chocks and using suitable equip-
ment for assistance, move machine to an appropri-
ate maintenance area. Again chock wheels securely.