JLG 500RTS ANSI Operator Manual - Manual (Page 22)

SECTION 2 - MACHINE PREPARATION AND INSPECTION
2-8 – JLG Sizzor – 3120695
2.7 DUAL FUEL 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 the engine from the ground control station.
2. Open the hand valve on the LP Gas supply tank by
turning counterclockwise.
BE SURE ALL GASOLINE IS EXHAUSTED BEFORE SWITCHING
TO LP GAS.
3. While the engine is operating, place the three posi-
tion LPG/GAS SELECT switch at the ground control
station to the center OFF position. Allow the engine
to operate, without load, until the engine begins to
‘stumble’ from lack of gasoline.
4. As the engine begins to ‘stumble’ place the switch to
the LPG position, allowing the LP fuel to be sent to
the fuel regulator.
Changing from LP Gas to Gasoline
1. With engine operating on LP under a no-load condi-
tion, position the LPG/GAS SELECT switch at
ground control to the GAS SELECT position.
2. If engine ‘stumbles’ because of lack of gasoline,
place the switch to the LPG position until engine
regains smoothness, then return the switch to the
GAS SELECT position. Repeat as necessary until
engine runs smoothly on gasoline.
3. Close the hand valve on the LP gas supply tank by
turning clockwise.
2.8 TORQUE REQUIREMENTS
The Torque Chart (See Figure 2-6.) consists of standard
torque values based on bolt diameter and grade, also
specifying dry and wet torque values in accordance with
recommended shop practices. This chart is provided as
an aid to the operator in the event he/she notices a condi-
tion that requires prompt attention during the walk-around
inspection or during operation until the proper service per-
sonnel can be notified. Section 1 of the Service and Main-
tenance Manual provides specific torque values and
periodic maintenance procedures with a listing of individ-
ual components. Utilizing this Torque Chart in conjunction
with the preventive maintenance section in Section 2 of
the Service and Maintenance Manual, will enhance safety,
reliability and performance of the machine.
62. Drive Cutout Switch and High Speed Cutout Switch
- No visible damage, properly secured.
63. Leveling Gauge - No visible damage, properly
secured.
64. Traversing Platform Valve (If Equipped) - No loose
or missing parts, no visible damage, properly
secured, no evidence of leakage.
65. Platform Assembly - No loose or missing parts, no
visible damage, platform deck extension operates
properly.
Figure 2-4. Walk-Around Inspection Points (Sheet 3 of 3)