This heavy-duty two wheel trolley was equipped with side rollers to maintain guided alignment of trolley wheels particularly where constant, power operated service is required such as an automatic Monotractor drive units.

Application of side rollers to the two-wheel trolley indicates that this must be used in pairs since any rocking action of a load would tend to set-up interference with the side rollers.

The application of side rollers to these heavy duty trolleys assures constant operation of carriers under extreme conditions particularly in an automatic dispatch system.

Load bar and hook arrangements for these trolleys are the same as original four and eight wheel trolleys of equal capacity.