These wrecks are from a "vintage" Hydromatik A6VM107 hydraulic motor,
year of manufacture - 1983. Check out the circular temper color pattern
on the barrel and the valve plate - the parts got pretty hot in this area (dark blue rounds 300 C or 570 F).
The major failure was caused by hard debris,
originated form the massive shaft bearings, which, despite their husky
nature (those of you who are familiar with this motor, know that the
bearings are rather big), failed shamelessly right after their
twenty-seventh birthday! You can observe the bearing leftovers on
the last four pics - not much left here...
Once again it is proved that any bearing, no matter
how big and robust it is, can be defeated by force and time!