Patent ID: 7610977

Claim:
A lift truck comprising: a power unit assembly comprising a power unit base, at least one wheel coupled to said base, and a system for driving said at least one wheel; a main frame assembly detachably connected to said power unit assembly, said main frame assembly comprising a main frame base, a mast assembly coupled to said main frame base, a carriage assembly coupled to said mast assembly, and a hydraulic drive apparatus comprising a hydraulic motor/pump assembly receiving power from a battery of said power unit assembly, wherein substantially the entirety of said hydraulic drive apparatus including said hydraulic motor/pump assembly is provided on said main frame assembly such that said main frame assembly is detachable from said power unit assembly without requiring disconnecting hydraulic connections to said power unit assembly; and a control module controlling the operation of said hydraulic motor/pump assembly of said hydraulic drive apparatus, wherein said control module is mounted on said power unit base.