User Manual

SECTION 2 - PROCEDURES
2-36 – JLG Lift – 3120884
2.19 PINS AND GAR-MAX BEARING REPAIR
GUIDELINES
Filament wound bea rings.
1. Pinned joints should be disassembled and
inspected if the following occurs:
a. Excessive sloppiness in joi nt s.
b. Noise origin atin g from the join t during op erati on.
2. Filament wound bearings should be replaced if any
of the following is observed:
a. Fra yed or separated fibers on the liner surfac e.
b. Cracked or damaged liner backing.
c. Bea rin gs tha t ha ve mo ve d or s pun in thei r ho us-
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
sur fa c e.
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, ni cks, and scratches whi ch would dam-
age the bearing during installation and opera-
tion.
2.20 SPEED SENSOR ADJUSTMENT
For proper drive o peration, 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
INTO FULL SPEED MODE IMMEDIATELY WHEN DRIVE IS
SELECT ED. THE MACHINE WIL L NOT STOP UNLE SS 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 O NLY DRIVE
AT CREEP SPEED. IF BOTH SENSORS ARE ADJUSTED TO O 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.