Caterpillar Works to Turn Used Engines Into Money

An engine block is disassembled at the Caterpillar plant. Remanufactured engines are sent to dealers for complete equipment rebuilds. Andrea Morales for The Wall Street Journal

Construction equipment maker Caterpillar Inc wants to sell engines -- again and again.

Every day, old, beat-up and broken-down engines from mining trucks and compactors return to a factory here to be inspected, taken apart and rebuilt again as new.