When I refer to a late serial number 2010, I am referring to when they swithced over the undercarriage from small bushing rails (i.e. 1010 style- 1 9/16" bushing dia. and 1" pins) to large bushing rails (i.e. 350 style- 1 3/4" bushing dia. and 1 1/8" pins). The serial number change was at 42,000.
FYI, there were other changes at earlier intervals- for instance the injector system on the diesels changed at a much earlier serial number (somewhere in the 20,000s). Thus it is not cut and dry to look at one piece of a crawler and guess its serial number. Mine was lost when the engine was swapped (another drawback of early serial number 2010s).
It sounds like your crawler was retrofitted with post-42,000 sprockets and has 350 rails. It sounds like you have already figured out you have 350 rails, unless you're not sure about your measurements. The best way to tell about the sprocket is to look at the sprocket serial number- the early sprocket part number is T19007 and the late is T13294. They are embossed on the face of the sprocket- you may not be able to see with the shields on. You are very lucky if you have the later sprockets, as it makes replacing undercarriage much cheaper. If you want to swap with me, I'll give you original sprockets and rails for your serial number machine
http://www.jdcrawlers.com/messageboard/ ... =2010+pins
http://www.jdcrawlers.com/messageboard/ ... =2010+pins
The new rollers are sealed for life and don't get grease. if you want to swap one out now is the time while your undercarriage is new. I remember it being stated several times that the most important thing is that all the rollers on a side are same wear diameter or the rails will not ride smoothly- if you wait you may be past that point. here is some more info about roller wear.
http://www.jdcrawlers.com/messageboard/ ... =2010+pins
As for rock guards, they are meant to keep rocks out of the rollers but Lavoy has stated that they are also critical to structural integrity of the track frames. Having said that, I have used mine without rock guards and haven't noticed any problems. I work in loamy soils so not a problem and have tried to keep abuse to a minimum.
http://www.jdcrawlers.com/messageboard/ ... =2010+pins
As for coolant overflow, I believe my radiator has a small tube at the neck of the radiator just below the pressure cap to allow overflow when hot. I don't know about a valve though.
(1) JD Straight 450 crawler dozer with manual outside blade; (2) JD 2010 diesel crawler loaders; (1) JD 2010 diesel dozer with hydraulic 6-way blade; (2) Model 50 backhoe attachments, misc. other construction equipment