JLG E45A_AJ ANSI Service Manual - Manual (Page 52)

SECTION 2 - PROCEDURES
2-36 – JLG Lift – 3120765
2.19 PINS AND GAR-MAX BEARING REPAIR
GUIDELINES
Filament wound bearings.
1. Pinned joints should be disassembled and
inspected if the following occurs:
a. Excessive sloppiness in joints.
b. Noise originating from the joint during operation.
2. Filament wound bearings should be replaced if any
of the following is observed:
a. Frayed or separated fibers on the liner surface.
b. Cracked or damaged liner backing.
c. Bearings that have moved or spun in their hous-
ing.
d. Debris embedded in liner surface.
3. Pins should be replaced if any of the following is
observed (pin should be properly cleaned prior to
inspection):
a. Detectable wear in the bearing area.
b. Flaking, pealing, scoring, or scratches on the pin
surface.
c. Rusting of the pin in the bearing area.
4. Re-assembly of pinned joints using filament wound
bearings.
a. Housing should be blown out to remove all dirt
and debris...bearings and bearing housings
must be free of all contamination.
b. Bearing / pins should be cleaned with a solvent
to remove all grease and oil...filament wound
bearing are a dry joint and should not be lubri-
cated.
c. Pins should be inspected to ensure it is free of
burrs, nicks, and scratches which would dam-
age the bearing during installation and opera-
tion.
2.20 SPEED SENSOR ADJUSTMENT
For proper drive operation, the speed sensors must be
properly installed and adjusted. The sensor operates on a
leading pulse to show direction. If installed wrong, the
sensor will not be able to sense the proper direction.
IF BOTH SPEED SENSORS ARE INSTALLED WRONG, THE CON-
TROLLER WILL THINK THE MACHINE IS ON A HILL AND WILL GO
IN TO FULL SPEED MO DE I MMEDIATELY WHEN DRIVE I S
SELECTED. THE MACHINE WILL NOT STOP UNLESS THE FOOT-
SWITCH IS RELEASED OR THE EMS IS PUSHED IN.
IF ONLY ONE SENSOR IS INSTALLED WRONG, THE CONTROL-
LER SENSES A PROBLEM AND THE MACHINE WILL ONLY DRIVE
AT CREEP SPEED. IF BOTH SENSORS ARE ADJUSTED TOO FAR
OUT, THE CONTROL SYSTEM CONTROLLER WILL NOT DRIVE
THE MACHINE.
Adjustment Procedure
1. Back off the locking nut and o-ring.
2. Thread the sensor in until it bottoms out (don’t use
excessive force).
3. Back-off 1-2 turns and align the notch with the axis
of the brake. Refer to Figure 2-37., Speed Sensor
Orientation.
4. Use a 1/2" wrench to hold the sensor and a 11/16"
wrench to snug the lock nut to the brake.