Bulletin 2751-001-M1/USA
Service Manual
HGA Hydraguide™
Hydraulics
Parker Hannifin Corporation
Hydraulic Pump/Motor Division
Greeneville, Tennessee
13
Service Procedure
WARNING: SINCE SOLVENTS ARE FLAMMABLE, BE EXTREMELY CAREFUL WHEN USING THEM.
EVEN A SMALL EXPLOSION OR FIRE COULD CAUSE DEATH OR INJURY.
WARNING: EYE PROTECTION SHOULD BE WORN.
WARNING: OSHA MAXIMUM AIR PRESSURE REQUIREMENTS SHOULD BE COMPLIED WITH TO
PREVENT INJURY.
CLEAN WORK CONDITIONS
It is a must that the system be kept free of dirt or
foreign matter in the oil circuit. Cleanliness in servicing
this power steering system is absolutely necessary.
If it is necessary to disassemble any of the units, make
sure that a clean work bench or table is used. (A piece
of clean wrapping paper makes an excellent dispos-
able top).
Outside dirt should be cleaned off before disconnect-
ing lines and port holes should be plugged immedi-
ately after disconnecting lines.
Finish cleaning off outside dirt before placing on work
bench.
When disassembled, parts should be cleaned only in
clear-clean petroleum base solvent and blown dry with
clean, dry air. Other solvents may cause deterioration
of rubber seals. Avoid wiping parts with cloth and
never steam clean hydraulic steering assemblies.
SERVICE PROCEDURE
For service information on the steering pump (engine-
driven) and power cylinder, see information provided
by the manufacturer of these units.
For servicing the HGA unit and the system, see
instructions in the following sections.
Servicing of HGA Unit
Page 14
Filling and Air Bleeding the System
When Drained of Oil
Page 24
Hydraulic Fluid
Page 24
