Dual Fuel System; Changing From Gasoline To Lp Gas; Changing From Lp Gas To Gasoline - JLG 800A Service And Maintenance Manual

SECTION 3 - CHASSIS & TURNTABLE

3.20 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 turn-
ing counterclockwise.
BE SURE ALL GASOLINE IS EXHAUSTED BEFORE SWITCHING TO LP GAS.
3. While the engine is operating, place the two position
LPG/Gasoline switch at the platform control station to
the LP position. Allow the engine to operate without
load until the engine regains smoothness.

Changing from LP Gas to Gasoline

1. With engine operating on LP under a no load condition,
throw the LPG/Gasoline switch at the platform control
station to the "Gasoline" position. Allow the engine to
operate with no load until the engine regains smooth-
ness.
2. Close the hand valve on the LP gas supply tank by turn.
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3.21 DEUTZ EMR 2
The EMR2 consists of the sensors, the control unit and the
actuator. Engine-side controls as well as the JLG Control Sys-
tem are connected by means of separate cable harnesses to
the EMR control unit.
The sensors attached to the engine provide the electronics in
the control unit with all the relevant physical parameters In
accordance with the information of the current condition of
the engine and the preconditions (throttle position etc.), the
EMR2 controls an actuator that operates the control rod of the
injection pump and thus doses the fuel quantity in accordance
with the performance requirements.
The exact position of the regulating rod is reported back and,
if necessary, is corrected, by means of the control rod travel
sensor, situated together with the rotation magnets in a hous-
ing of the actuator.
The EMR2 is equipped with safety devices and measures in the
hardware and software in order to ensure emergency running
(Limp home) functions.
In order to switch the engine off, the EMR2 is switched in a de-
energized fashion over the ignition switch. A strong spring in
the actuator presses the control rod in the de-energized con-
dition into the zero position. As a redundancy measure, an
additional solenoid serves for switching off and this, indepen-
dently of the actuator, also moves the control rod in the de-
energized condition into the zero position.
After the programming, that is carried out over the ISO9141
interface, the EMR2 possesses a motor-specific data set and
this is then fixedly assigned to the engine. Included in this are
the various application cases as well as the customer's wishes
regarding a particular scope of function.
Each EMR2 module is matched by serial number to the engine.
Modules cannot be swapped between engines.
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