Electrical System
9.22
3507, 3508, 3509, 3512, 3513, 4007, 4008, 4009, 4012, 4013
b. Alternator Installation
1. Position the alternator and align with the upper
alternator mount on the engine bracket. Insert the
upper mounting hardware through the alternator
mount.
DO NOT
tighten completely at this time.
2. Align the lower alternator mount hole with the lower
mounting bracket on the engine. Insert the lower
mounting capscrew.
DO NOT
tighten completely at
this time.
3. Install the fan belt, adjust the alternator for proper
belt tension and belt alignment. Tighten the lower
capscrew and upper capscrew securely.
4. Connect the previously labeled wire leads.
5. Connect the battery negative (-) cable to the battery
negative (-) terminal.
6. Close and secure the engine cover.
9.9
ELECTRICAL SYSTEM
COMPONENTS
9.9.1
Load Moment Indicator
The Load Moment Indicator provides a visual indication
for forward stability limitations.
•
All five LED’s will light (three green, yellow & red)
and the warning buzzer sounds as the machine
reaches its forward stability limitations.
•
The red LED is illuminated when the machine has
reached its forward stability limitations.
•
Overload Protection Function. When the red LED is
illuminated the automatic overload protection
function is activated. Boom extension and lower
functions are disabled.
Test the LMI at the beginning of each work shift.
1. Fully retract and level the boom, with no load. Do
not raise the boom during this test.
2. Level frame using level in cab.
3. Press the test button on the LMI display. This will
cause all LEDs to flash on and an audible warning to
sound. This indicates that the system is functioning
properly. If the test gives a different result, the
system is not functioning properly and the machine
must be removed from service and repaired before
continued operation.
Note:
The Load Moment Indicator is
NOT
a serviceable
item. The Load Moment Indicator must be inspected
and/or replaced by a qualified dealer or a JLG
technician.
9.9.2
Load Moment Sensor
The LMI sensor (
3
) is bolted on the top right of the rear
axle.
a. Load Moment Sensor Removal
1. Park the machine on a firm, level surface, level the
machine, fully retract the boom, lower the boom,
place the transmission control lever in (N)
NEUTRAL, engage the park brake and shut the
engine OFF.
2. Place a Do Not Operate Tag on both the ignition key
switch and the steering wheel, stating that the
machine should not be operated.
3. Open the engine cover. Allow the engine to cool.
4. Disconnect the battery negative (-) cable at the
battery negative (-) terminal.
5. Disconnect the LMI electrical connector.
6. Loosen and remove the two bolts holding the LMI
assembly to the rear axle.
7. Remove the sensor assembly.
b. Load Moment Sensor Installation
1. Clean the bare metal with a degreasing solution and
allow to dry.
2. Apply a thin film of Loctite® 638 adhesive to the flat
metal surface of the transducer, ensuring the
adhesive is spread evenly over the entire surface.
3. Fit the transducer, ensuring the lead exits in the
corner direction. If the existing bolts are not
available, use M10 x 40mm bolts with a minimum
tensile strength of 10.9. No washers are used.
Note:
It is important to prevent distortion of the sensor
element, therefore tighten the bolts alternately a small
amount at a time, until a value of 70 Nm (50 lb-ft) is
achieved.
3
