Section 4 • Repair Procedures
REV A
June 2007
4 - 80
GS-2668 RT • GS-3268 RT
Part No. 112657
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 4 m.
69 Rotate the safety arm away from the machine
and let it hang down..
70 Loosen the fasteners securing the down limit
switch just enough to allow movement of the
limit switch.
71 Move the roller head of the down limit switch
1 mm downwards. Tighten the fasteners. Do
not over tighten.
72 Raise the platform to approximately 4 m.
73 Rotate the safety arm away from the machine
and let it hang down.
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 lift relief valve. See 9-2,
How to
Adjust the Lift Relief Valve.
CONDITION POSSIBLE
CAUSE
SOLUTION
CANNOT LIFT RATED LOAD
RELIEF VALVE SET TOO LOW
INCREASE RELIEF VALVE PRESSURE
AT MAXIMUM HEIGHT WITH RATED LOAD IN
PLATFORM, THE PRESSURE SWITCH
ALARM CONTINUES TO SOUND
SYSTEM NEEDS TO BE RESET
TURN OFF RED EMERGENCY STOP
BUTTON, WAIT THREE SECONDS AND TURN
BACK ON
MAXIMUM HEIGHT LIMIT SWITCH OUT OF
ADJUSTMENT -OR- FAULTY
LOWER THE UP LIMIT SWITCH SLIGHTLY
-OR- REPLACE CONTACTS
TOO MUCH WEIGHT IN PLATFORM
PUT CORRECT RATED LOAD IN PLATFORM
PRESSURE SWITCH OUT OF ADJUSTMENT
TURN THE PRESSURE SWITCH NUT 1/4
TURN INTO THE HYDRAULIC LINE
BATTERIES ARE NOT FULLY CHARGED
CHARGE BATTERIES
OVERLOAD SYSTEM NOT ADJUSTED
PROPERLY
REPEAT CALIBRATION PROCEDURE
SLIDER CHANNEL NOT LUBRICATED
LUBRICATE SLIDER CHANNELS
AT DOWN LIMIT WITH RATED LOAD IN
PLATFORM, THE PRESSURE SWITCH
ALARM CONTINUES TO SOUND
SYSTEM NEEDS TO BE RESET
TURN OFF RED EMERGENCY STOP
BUTTON, WAIT THREE SECONDS AND TURN
BACK ON
DOWN LIMIT SWITCH OUT OF ADJUSTMENT
RAISE THE DOWN LIMIT SWITCH
TOO MUCH WEIGHT IN PLATFORM
PUT CORRECT RATED LOAD IN PLATFORM
OVERLOAD SYSTEM NOT ADJUSTED
PROPERLY
TURN THE PRESSURE SWITCH NUT 1/4
TURN INTO THE HYDRAULIC LINE -OR-
REPEAT CALIBRATION PROCEDURE
TROUBLESHOOTING THE PLATFORM OVERLOAD SYSTEM
PLATFORM OVERLOAD COMPONENTS
Summary of Contents for GS-2668 RT
Page 4: ...June 2007 GS 2668 RT GS 3268 RT Part No 112657 iv This page intentionally left blank ...
Page 14: ...June 2007 GS 2668 RT GS 3268 RT Part No 112657 xiv This page intentionally left blank ...
Page 184: ... from serial number GS6805 44771 Part No 112657 Rev C2 Service Manual GS 2668 RT GS 3268 RT ...