JLG 80HX_HX+6_HXER ANSI Service Manual - Manual (Page 60)

SECTION 3 - CHASSIS & TURNTABLE
3-22 – JLG Lift – 3120271
1. From the basket (for idle) start the engine and allow
it to come up to operating temperature. Set the idle
speed at 1000 RPM using the idle adjustment screw
on the carburetor. Shut off the engine.
2. Remove the cover on the Adeco actuator. With no
function activated, the actuator should be fully
extended. Hold the governor arm in the idle position.
Adjust slide pin (1) to contact the idle limit switch at
the output rod end of the actuator. Adjust the actua-
tor rod until you can hook it up to the governor arm.
3. With the aid of an assistant, start the engine from the
basket and allow it to come to operating tempera-
ture. Disconnect the proportional dump valve wire.
Activate the footswitch. Turn the high engine switch
on. Hold the drive controller in the full drive position.
Adjust the slide pin (2) to contact high engine limit
switch at 3000 RPM (2500 RPM for machines with
piston pump). Shut off all switches and controllers.
Reconnect proportional dump valve wire.
4. With the aid of an assistant, start the engine from the
basket and allow it to come to operating tempera-
ture. Disconnect the bang-bang dump valve wire.
Activate the footswitch. Operate a bang-bang func-
tion switch to increase RPM to low engine speed.
Using a small screwdriver set low engine speed at
1800 RPM at the Adeco electronic module.
NOTE: Early machines are at idle until a function is acti-
vated. Later machines are at idle only at the platform
without the footswitch activated. Therefore when set-
ting low engine speed on later machines it will not
be necessary to disconnect the bang-bang dump
valve wire or operate a bang-bang function. Just acti-
vate the footswitch to get low engine speed.
3.7 THROTTLE CHECKS AND PRECISION
GOVERNOR ADJUSTMENTS, LSG-423 &
LRG-425
NOTE: Never run the fuel tank dry. Diesel engines cannot be
restarted after running out of fuel until the fuel system
has been air-vented or ‘bled’ of air. See the Deutz
Instruction Manual for procedure.
Checks
1. Check that the anti-dieseling solenoid is operating. If
the solenoid is operating, an audible click at the car-
buretor should be heard when the ignition is
switched on.
2. Check the throttle linkage for smooth operation by
rotating the throttle lever by hand to the full throttle
position then slowly back to the idle position, feeling
closely for sticking or binding. To accomplish this
the throttle rod must first be disconnected.
Carburetor and Governor Adjustment
1. With the aid of an assistant, start the engine at the
platform console and allow it to come up to operat-
ing temperature with air cleaner installed. Adjust the
carburetor idle screw until the engine idles at 1000
RPM. Shut down the engine.
NOTE: Steps 2 and 3 are preliminary settings.
2. On the controller (in ground control box) turn the
“high engine.” (P1) adjusting screw 25-30 turns
CCW, then 10 turns CW.
3. On the controller (in ground control box) turn the
“gain” (P2) adjusting screw CCW to the stop, then
CW until the screw slot is vertical (approximately 1/4
turn).
4. On the controller (in ground control box) turn the
“droop” (P3) adjusting screw CCW to the stop, then
CW until the screw slot is vertical (approximately 1/4
turn). No further adjustment should be necessary to
“droop” (P3).
5. With the aid of an assistant at the platform console,
start the engine and allow it to come up to operating
temperature. Then have the assistant depress the
footswitch and place the engine speed switch to
HIGH ENGINE.