1
INTRODUCTION
The following procedure replaces the LA500 arm trolley nut,
should it become damaged by a car strike to the gate or other
similar event. This procedure is intended to be performed in a
clean shop by personnel confident in performing such
procedures.
Most of the LA500’s internal drive train parts are factory
assembled under tight tolerances. Should any of these parts lose
alignment, reliable performance will be impacted. This
procedure’s performance may impact the arm warranty coverage;
therefore, if the subject arm is still covered under product
warranty, please consider replacing the arm instead of performing
this procedure. Retain all hardware; it will be needed for
reassembly.
To reduce the risk of INJURY or DEATH:
• DISCONNECT power and battery BEFORE installing or
servicing operator.
• See manual regarding maintenance and required safety
testing prior to servicing.
TROLLEY NUT SERVICE KIT
MODEL K75-39337
TOOLS NEEDED
•
LA500 control box with photoelectric sensors
• Torque
screwdrivers
• Metric
Allen
wrench
• 12V,
7A
battery
•
Flathead and Phillips head screwdrivers
•
Fastener (E-ring) pliers
• Needle
nose
pliers
CARTON INVENTORY
Description
QTY
Trolley nut
1
ADDITIONAL PARTS INCLUDED
The following items are provided for additional damage that
occurred when the trolley nut was broken, or for parts that may
have become lost in the performance of this procedure.
Description
QTY
Pan Head Screw, M5
2
Split Washer, M6
3
Pan Head Screw, M6
1
Nut, M6
3
O-ring
1
Pin
1
Retaining Ring
1
Retaining Ring
1
Bearing
1
Trolley Plate
2
Bushing Retainer
1
Flat Washer, M6
2
Screw M6
2
Trolley Pin
1
Base plate
1
Arm Gasket
1
Screw, M5
12
WARNING:
This product can expose you to chemicals
including lead, which are known to the State of California to
cause cancer or birth defects or other reproductive harm.
For more information go to
www.P65Warnings.ca.gov.
INSTALLATION
OPEN THE ARM
1. Invert the arm to gain access to the top cover screws.
2. Remove the 12 top cover screws using a T25 torque
screwdriver or wrench.
3. Turn the arm back to normal operating orientation.
4. Carefully separate the top cover from the rest of the arm.
Note that the post bracket might fall out.
5. Place the top cover in a safe, clean location. Make sure that
the arm gasket does not get contaminated.
Post Bracket
Top Cover
Top Cover Screws
