June 2021
Table of Contents
viii GS
â„¢
-84 • GS
â„¢
-90 Part No. 1306587GT
Section 3 Repair Procedures ............................................................................................. 16
Introduction .......................................................................................................... 16
Platform Controls ............................................................................................... 18
1-1 Circuit Board .................................................................................................. 18
How to Remove the Platform Controls Circuit Board ..................................... 18
Platform Components ....................................................................................... 19
2-1 Platform .......................................................................................................... 19
How to Remove the Platform .......................................................................... 19
2-2 Platform Extension Deck ............................................................................... 21
How to Remove the Platform Extension Deck ................................................ 21
Scissor Components ......................................................................................... 22
3-1 Scissor Assembly, GS-3384 and GS-3390 ................................................... 23
How to Disassemble the Scissor Assembly ................................................... 23
How to Disassemble a Scissor Arm Pair ........................................................ 27
3-2 Scissor Assembly, GS-4390 .......................................................................... 29
How to Disassemble the Scissor Assembly ................................................... 29
How to Disassemble a Scissor Arm Pair ........................................................ 33
3-3 Scissor Assembly, GS-5390 .......................................................................... 36
How to Disassemble the Scissor Assembly ................................................... 36
How to Disassemble a Scissor Arm Pair ........................................................ 41
3-4 Wear Pads ..................................................................................................... 42
How to Replace the Scissor Arm Wear Pad ................................................... 42
How to Replace the Chassis Scissor Arm Wear Pads ................................... 43
3-5 Lift Cylinders .................................................................................................. 45
How to Remove the Lift Cylinder - GS-3384, GS-3390 and GS-4390 ........... 45
How to Remove the Lift Cylinder - GS-5390 .................................................. 47
3-6 Height Angle Sensor ...................................................................................... 49
How to Replace the Height Angle Sensor ...................................................... 49
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