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<blockquote data-quote="moonbase" data-source="post: 1056940" data-attributes="member: 178786">I'm back,Today's offering is the work I have been doing recently on the Precision polar mount.The mount itself was in good shape but as it is my intention to sell it I thought I would give it a thorough inspection and a clean up. Firstly, I gave the polar mount a gentle jet wash to remove loose dirt and grime then dismantled it to get a closer view of the top and bottom bearings.Both top and bottom bearings inserts were in good condition with a smooth noiseless rotation. There was a bit of weathering on the outside of parts of the bearing housings but it has no impact on the functionality of the mount. I removed some of the easily accessible weathering with a fine scotch brite type of pad to reveal the original paintwork underneath.As a point of information, the type of bearing setup used by Precision on their polar mounts were ASAHI FT203 bearing housings with 203PR-C bearing inserts.The M16 bolts that pass through the bearings and secure the inner frame of the polar mount to the outer frame were in decent shape but had a bit of flaking to the plated finish. These were replaced with brand new stainless steel M16 bolts of the same length. The upper M16 bolt passes through the declination angle strut and a grooved square washer is used to approximately set the declination angle. This washer had a bit of corrosion on it so I rubbed it down to bare metal and gave it a few coats of cold galvanising paint.After that it was a nipple grease followed by reassembly. Once reassembled, fresh denso tape was wrapped around both top and bottom bearing collars where they protrude from the housing to provide weatherproofing.A few pictures of the polar mount work are uploaded below.</blockquote>

[QUOTE="moonbase, post: 1056940, member: 178786"] I'm back, Today's offering is the work I have been doing recently on the Precision polar mount. The mount itself was in good shape but as it is my intention to sell it I thought I would give it a thorough inspection and a clean up. Firstly, I gave the polar mount a gentle jet wash to remove loose dirt and grime then dismantled it to get a closer view of the top and bottom bearings. Both top and bottom bearings inserts were in good condition with a smooth noiseless rotation. There was a bit of weathering on the outside of parts of the bearing housings but it has no impact on the functionality of the mount. I removed some of the easily accessible weathering with a fine scotch brite type of pad to reveal the original paintwork underneath. As a point of information, the type of bearing setup used by Precision on their polar mounts were ASAHI FT203 bearing housings with 203PR-C bearing inserts. The M16 bolts that pass through the bearings and secure the inner frame of the polar mount to the outer frame were in decent shape but had a bit of flaking to the plated finish. These were replaced with brand new stainless steel M16 bolts of the same length. The upper M16 bolt passes through the declination angle strut and a grooved square washer is used to approximately set the declination angle. This washer had a bit of corrosion on it so I rubbed it down to bare metal and gave it a few coats of cold galvanising paint. After that it was a nipple grease followed by reassembly. Once reassembled, fresh denso tape was wrapped around both top and bottom bearing collars where they protrude from the housing to provide weatherproofing. A few pictures of the polar mount work are uploaded below. [/QUOTE]

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