but did the tanks break every time they rolled or were they pretty reliable?
How much maintenance does a 25 year old tank need?
When I was in Germany with 13th Tank we had M-60A3's that were either new manufacture or so utterly overhauled they might as well be new. They were rock reliable generally speaking - the tracks had their wear issues (funny to watch the tank ahead of you unspool it's right hand track and roll all the way off of it while going down the autobahn. Thankfully no German's weaving in and out of the column at the time!)
Got to Ft. Riley and the well worn M-60A1 RISE tanks. Honestly, as long as the -10 maintenance and higher service was done on time, they were OK. Going to the coincidence rangefinder after being trained on lasing sucked and the packs needed replacement somewhat more often because metal shavings showed up in the oil samples more frequently than overseas.
I was a Loader/Driver & was training for Gunner when I left active duty to become Infantry in the Guard - no tanks close enough for drilling. Given the grim nature of the M113's we had sometimes (till we got the A3's) I imagine those old M-60's would have been in much rougher shape. Looking back I should have stayed in, gone back to Germany and transitioned to M-1s