Bulletin 2751-001-M1/USA
Service Manual
HGA Hydraguide™
Hydraulics
Parker Hannifin Corporation
Hydraulic Pump/Motor Division
Greeneville, Tennessee
7
Hydraguide™ Steering
SYSTEM OPERATION
This literature with the illustrations shown covers the basic design of the HGA unit. Variations may be engineered
to suit special requirements.
The description of the operation of the HGA unit and the illustrations explain the functioning of the system for the
utilization of the hydraulic power generated by the engine-driven pump for power steering. Emergency manual
operation is also described.
Satisfactory performance of this system requires a well engineered installation designed for the particular
type of vehicle and the type and kind of service for which it will be used. Parker Engineering advice and
assistance is available and we welcome requests.
Information on the required engine-driven pump capacity and the power cylinder size and connecting lines are
provided through engineering contacts. A balanced cylinder design is preferred.
Figure HGA-1
DESIGN & FUNCTION
The HGA unit consists of a fluid control valve section and a fluid metering section which are hydraulically and
mechanically inter-connected.
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