Purpose of Manual
This manual is issued as the service publication for the Vickers' VTM27, VTM28, VTM40, VTM41, and VTM42
Series Power Steering pumps. These pumps may be identified specifically by model code shown on the name
This manual contains service information for the proper operation, maintenance, and overhaul of all pumps
covered by the model code shown in the Typical Model Code Breakdown table.
Physical and Operating Characteristics
The Vickers VTM27, VTM28, VTM40, VTM41, and VTM42 Power Steering Pump units are used primarily to
supply a flow of hydraulic fluid for operation of power steering mechanisms. Pumps in this series are of the
balanced vane-type and have a constant rate of delivery per revolution. Direction of pump rotation and
pumping capacity may be changed to suit specific applications. The pumps are available with an integral
reservoir or with a manifold for remote reservoir installations.