Brought the manual and did the measurements.
Chain pitch 25.2" thru 25.7", measured 25.3
Chain link ht 3.5" to 3.26", measured 3.3 to 3.4
Carrier roller 6.0" to 5.5", measured 5.772
Front Idler .96" to .77", measured .836"
So far, so good....yes it is worn but within the specs.
Then this: the Roller / Pins, FYI feel like a egg (or maybe a pear). New is 2.010. Reverse direction is 1.885, Forward direction is 2.002.
The spec for 'high impact' is 1.890 and for 'normal' is 1.820. Bumping into a limit.
Seems like a roller turn would alleviate the concern of "old pin in that worn chain on the new sprocket".
However am not sure about location of track press shop. Is it true that track press shops dont always perform the "sealed and lube", they do a "greased" turn? And the cost for a new chain may not be that much more than trucking the assemblies a long ways and then paying for the turn.
Or....since the pitch measurement shows that is aspect is not near worn out, maybe throw a sprocket into the mix although the rollers look like an egg and delay the inevitable?? Ergo try to discard the chain when all worn out.
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As far as the track tension adjuster not holding, thinking the area should have been cleaned more often but never did take off the covers and attended to that, but yes belly pans are regularly cleaned out but didnt think of the track adjuster - this problem is seals fer sure, and maybe the chrome damaged on the rod too.
Marker some black lines on the roller where worn (looking upward at roller)
Chip on tooth (thin)
Pointed and one side worn more than other
Pipe in sprocket to pull track tight for measurement of pitch
Thanks for all the wisdom, tips, and suggestions.