Genie GS-3384 Service Manual page 76

Section 3 • Scheduled Maintenance Procedures
CHECKLIST D PROCEDURES
67 Lower the platform to the stowed position and
remove the weight from the platform.
Result: The platform lowers to the stowed
position. Proceed to step 72.
Result: The platform stops lowering. The down
limit switch needs to be calibrated. Proceed to
step 68.
68 Raise the platform to approximately 6 m.
69 Release the safety arm latch, lift the safety arm
and rotate to a vertical position. Lock the safety
arm in position.
70 Loosen the fasteners securing the down limit
switch cam just enough to allow movement of
the cam.
71 Working from the outside of the machine, rotate
the down limit switch cam in a counter
clockwise direction until the cam lobe is
approximately 1 mm higher. Tighten the
fasteners. Do not over tighten.
When adjusting the down limit
switch cam, do not move cam
which activates the load sense
delay limit switch.
TROUBLESHOOTING THE PLATFORM OVERLOAD SYSTEM
CONDITION
CANNOT LIFT RATED LOAD
AT MAXIMUM HEIGHT WITH RATED LOAD IN
PLATFORM, THE PRESSURE SWITCH
ALARM CONTINUES TO SOUND
AT DOWN LIMIT WITH RATED LOAD IN
PLATFORM, THE PRESSURE SWITCH
ALARM CONTINUES TO SOUND
3 - 52
72 Raise the platform to approximately 6 m.
73 Release the safety arm latch, lift the safety arm
and rotate to a vertical position. Lock the safety
arm in position.
74 Install the cover onto the platform overload
pressure switch or switch box and securely
tighten the cover retaining fasteners. Do not
over tighten.
75 Apply Sentry Seal to one of the cover retaining
fasteners where it contacts the platform
overload pressure switch box.
76 Return the safety arm to the stowed position.
77 Lower the platform to the stowed position.
78 Calibrate the system relief valve. Refer to
Repair Procedure 7-5, How to Adjust the
System Relief Valve.
POSSIBLE CAUSE
RELIEF VALVE SET TOO LOW
SYSTEM NEEDS TO BE RESET
MAXIMUM HEIGHT LIMIT SWITCH OUT OF
ADJUSTMENT -OR- FAULTY
TOO MUCH WEIGHT IN PLATFORM
PRESSURE SWITCH OUT OF ADJUSTMENT
BATTERIES ARE NOT FULLY CHARGED
OVERLOAD SYSTEM NOT ADJUSTED
PROPERLY
SLIDER CHANNEL NOT LUBRICATED
SYSTEM NEEDS TO BE RESET
DOWN LIMIT SWITCH OUT OF ADJUSTMENT RAISE THE DOWN LIMIT SWITCH
TOO MUCH WEIGHT IN PLATFORM
OVERLOAD SYSTEM NOT ADJUSTED
PROPERLY
GS-3384
September 2005
SOLUTION
INCREASE RELIEF VALVE PRESSURE
TURN OFF RED EMERGENCY STOP
BUTTON, WAIT THREE SECONDS AND TURN
BACK ON
LOWER THE UP LIMIT SWITCH SLIGHTLY
-OR- REPLACE CONTACTS
PUT CORRECT RATED LOAD IN PLATFORM
TURN THE PRESSURE SWITCH NUT 1/4
TURN INTO THE HYDRAULIC LINE
CHARGE BATTERIES
REPEAT CALIBRATION PROCEDURE
LUBRICATE SLIDER CHANNELS
TURN OFF RED EMERGENCY STOP
BUTTON, WAIT THREE SECONDS AND TURN
BACK ON
PUT CORRECT RATED LOAD IN PLATFORM
TURN THE PRESSURE SWITCH NUT 1/4
TURN INTO THE HYDRAULIC LINE -OR-
REPEAT CALIBRATION PROCEDURE
Part No. 82259
REV D