29
Slide Block Adjustment
Annually check for wear on the slide blocks and
replace or retighten as necessary. If the lift exhibits
excessive mast sway, it is probable that the slide
blocks need adjustment. The slide blocks should be
adjusted so that there is no air gap between the
slide block and the mast the slide block is moving
against. There are 16 slide blocks, - 8 upper and 8
lower. Three upper slide blocks are shown in Figure
4-13.
Start with the slide blocks on one side of the inner
mast. Adjust the upper and lower slide blocks on
one side, followed by the upper and lower slide
blocks on the opposite side. Repeat the adjustments
for the center mast slide blocks, followed by the
outer mast slide blocks. The adjustment procedure is
the same for all slide blocks:
Loosen, but do not remove the slotted hex screw
securing the slide block.
Use an Allen wrench to turn the set screws
clockwise. This will push the block in against the
next mast. Do not overtighten. Tighten the
slotted hex head screw to secure the slide block
in position.
After all adjustments are made, fully extend the
lift. If the platform can be raised and lowered
without hesitation or stopping, the blocks are
properly adjusted.
Figure 4-13. Slide Blocks Adjustment
NOTE: The plastic slide blocks in the mast are
made of a bearing material which has a high
degree of lubricity and need only be kept clean.
However, precautions should be taken to ensure
that the paths along which the blocks move are
kept clean and lightly lubricated with a dry type
silicon lubricant.
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