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Step 1:
•
Keep vertical arm in vertical position and the horizontal arm in horizontal position as shown in the in Figure 65
(illustration 2).
•
The scissor arm should not droop from its position. If it droops, tighten the horizontal arm spring slotted nut using
flat screwdriver through the spring adjustment window as shown in Figure 64.
Note:
If over tightened, the effort required to move the horizontal arm is high in which case loosening may be
required.
Step 2:
•
Keep the scissor arm with both arms vertical (folded / locked position) as shown in the Figure 65 (illustration 1).
•
The Scissor Arm should stay in its locked position without moving or drifting. If unstable, replace the Scissor Arm.
Step 3:
•
Keep the vertical arm in horizontal position and horizontal arm in vertical position as shown in the Figure 65
(illustration 3).
•
Both the arms should stay in position without moving. In this position the horizontal arm is in locked position and
no adjustments are required for the horizontal arm.
•
If the vertical arm is unstable adjust the vertical arm spring by loosening (by loosening the slotted nut) using flat
screwdriver through the spring adjustment window as shown in Figure 64 .
Movement Test- 1:
•
Move the scissor arm very slowly in small increments from step 3 to step 2 position as above and then move
back similarly from step 2 to step 3 position in small increments.
•
The scissor arm should stay stable without drooping at all positions. If it droops, tighten the vertical arm spring
using screwdriver through the spring adjustment window (by tightening the slotted nut as shown in Figure 64).
•
Once it reaches Step 3 position, if the Vertical arm moves up (unstable) then adjust the vertical arm spring by
loosening (by loosening the slotted nut as shown in Figure 64) using screwdriver through the spring adjustment
window. Repeat the "Movement Test-1" procedure to reconfirm or fine tune adjustments.
Movement Test- 2:
•
Move the scissor arm very slowly in small increments from step 3 to fully expanded position as shown in Figure
65 (illustration 4). The scissor arm should stay stable at all positions. If unstable, Scissor Arm need to be
replaced.
Movement Test- 3:
•
Move the vertical arm from 0° to 90° stopping at every 10° increment approximately. For every position move the
horizontal arm from one extreme end to another extreme end stopping at every 10° increment.
•
At each position the scissor arm should be stable. If unstable, replace Scissor Arm. Install the 2 rectangular S-ARM
caps to the spring adjusting windows of the scissor arm.
Figure 65 (Scissor Arm movement check)
Page 29 of 34
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