JLG 600SC_660SJC Service Manual - Manual (Page 32)

SECTION 3 - TURNTABLE
3-2 – JLG Lift – 3120898
3.2 THROTTLE CHECKS AND
ADJUSTMENTS - DEUTZ
General
The throttle control system on the Deutz engine includes
the positional controller and the actuator.
Four LEDs are incorporated in the controller. They are as
follows:
• Red - failure: signals a problem with the system -
needs service or adjustment
• Green - clutch engaged; operation normal while sys-
tem is powered.
• Amber - motor extend
• Amber - motor retract
The controller is designed so that when the system volt-
age reaches 10.5 volts, the actuator clutch will be
released and the motor drive turned off in order to prevent
unpredictable operation from occurring.
When a failure condition occurs (i.e. position time-out) the
controller will release the clutch and turn off the actuator
motor. This will prevent unnecessary motor wear.
Procedure
NOTE: Never run fuel tank dry. Diesel engines cannot be
restarted after running out of fuel until fuel system
has been air-vented or bled of air. See Deutz Instruc-
tion Manual for procedure.
1. Power the ignition switch at the ground control
panel. Set the mid rpm.
2. Supply 12 volts of power to the white wire on the
controller. Set the high engine rpm.
NOTE: Actuator rod travel must stop slightly before lever
makes contact with throttle lever stop. Failure to do
so will burn out actuator.
Controller Status
Clutch engaged no actuator movement
Clutch engaged actuator extending
Table 3-1.Position Controller Truth Table
Control Wiring
Actuator Position
Black Red White Green
GND OFF X X OFF POSITION (Freewheel)
GND +12 VDC OFF OFF POSITION 1 (See Adjustments)
GND +12 VDC +12 VDC OFF POSITION 2 (See Adjustments)
GND +12 VDC OFF +12 VDC POSITION 3 (See Adjustments)
GND +12 VDC +12 VDC +12 VDC POSITION 4 (See Adjustments)
GND = POWER SUPPLY OR BATTERY GROUND
OFF = GROUND OR OPEN CIRCUIT
X = DON’T CARE
+12 VDC = +12 VOLT POWER SUPPLY OR BATTERY SYSTEM, VIA A 5 AMP FUSE
OR CIRCUIT BREAKER
TRIMMER ADJUSTMENTS LED INDICATORS
1 - POSITION 1 CW=RETRACT
2 - POSITION 2 CW=RETRACT
3 - POSITION 3 CW=RETRACT
4 - POSITION 4 CW=RETRACT R - RETRACT INDICATOR (AMBER)
E - EXTEND INDICATOR (AMBER)
C - CLUTCH INDICATOR (GREEN)
F - FAILURE INDICATOR (RED)
HIGH#2
MID #1
CCW EXTEND
ACTUATOR
(HIGHER)
CW
CCW
Figure 3-2. Addco Adjustments