MSR Rotator Brush Replacement Information
DRK10051 (REV002 | NOV 2016)
Copyright © 2008-2016 Pine Research Instrumentation
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A special brush replacement kit (part number ACAR063LHM) should be used when the rotator is routinely operated
in low humidity conditions such as inside a glove box.
Remove the entire brush assembly from the rotator by unscrewing it as shown below. It should be possible to remove
the brush assembly by hand (see: Figure 3-2). In some cases, such as when a brush assembly has never been
removed after years of use, you may require some basic hand tools to remove/break the tight seal of the brush
assembly. Use caution not to damage the housing with tools if you intend to reuse it.
Figure 3-2. Removal of Old Brush Assembly by Turning (Left) and Pulling Out (Right).
Use the small hex key to remove the set screw. Note that the required hex key (0.035”) is included with the brush
replacement kit (see: Figure 3-3).
Figure 3-3. Removal of the Brush Set Screw.
INFO:
The brush is spring-loaded. When you remove the set screw, the brush will tend
to fly out of the brush holder. Use a finger to hold it in place as you are removing
the set screw.
After removing the set screw, remove and discard the old brush, but do not discard the empty brush holder. The
new replacement brush includes a set screw which is already installed. Temporarily remove this set screw. Be careful
not to misplace the set screw (see: Figure 3-4).
Carefully slide the new spring-loaded brush into the brush holder. Be careful to properly align the set screw hole
with the slot on the side of the brush holder. While squeezing the new brush into the brush holder, use the hex key
to reinstall the set screw. Tighten the set screw until it stops turning (see: Figure 3-5).
Summary of Contents for MSR 636A
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