Shaft assembly which retains a reversible shaft

A removable shaft assembly, comprising:

• a drive shaft having internal splines defined therein;
• an output shaft positioned within the drive shaft and having a first set of external splines defined thereon adapted to engage the internal splines of the drive shaft;
• and
• a cap axially aligned with the drive shaft having an internal splines defined thereon which are adapted to (i) prevent an axial movement of the output shaft relative to the drive shaft when the cap is in a first position and (ii) allow axial movement of the drive shaft relative to the output shaft when the cap is in a second position, the cap including an externally exposed portion and the cap being moveable between the first and second positions in response to selective movement of the externally exposed portion,
• wherein the output shaft may be removed from the drive shaft when the cap is placed in the second position by axially sliding the first set of external splines through the internal splines of the cap.