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MPT-90 PRODUCT MANUAL This document contains U.S. export controlled technical data as regulated by the U.S. Export Administration Regulations 15 CFR Parts 730-774, export, disclosure or transfer contrary to U.S. law is prohibited.
Figure 17: Drive Chain Adjustment
6.5 Pan and Tilt Bearings
The Pan & Tilt motions are carried on sealed, opposed ball bearings. The
proper preload on these bearing pairs is factory adjusted and will not require
field adjustment.
6.6 Backlash
Backlash is defined as unwanted movement in the Pan and/or Tilt section.
Backlash can develop due to excessive center distance between Helical Gear
and the Worm Gear or axial movement of the worm.
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