Steering Pump - Honda Prelude 1993 Service Manual

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Table of Contents

System Description

Construction

The pump is a vane-type incorporating a tlow controlvalve (with an integrated relief valve) and is driven by a V-belt from

the crank pulley. The pump features 1O vanes. Each vane performs two intake/discharge operations lor every rotation of

th€ rotor. This means that the hydraulic fluid pressure pulse becomes extremely small during discharge.

The belt-driven pullev rotates the rotor through the drjve shaft. As the rotor rotates, the hydraulic

pressure is applied to

the vane chamber of the rotor and the vanes will rotate while being pushed onto the inner circumference

of the cam rlng'

The inner circumterence of the cam ring has an extended portion with respect to the center of the shaft,

so the rollers

move downward in the axial direction as the carrier rotates. As a result of this roller movement, the internal

volume of the

vane chamber will change, resulting in fluid intake and discharge

START OF FLUID INTAKE

FLUID INTAKE

FLUID MOVEMENT

FLUID DISCHARGE

The vanes are pushed onto

the inner circumference of

the cam ring.

The volume of the

chamber increases so

tluid is sucked in.

The sucked-in fluid moves

toward the discharge port,

A s t h e v a n e s r e t u r n t o t h e

t h e i r o r i g i n a l p o s i t i o n o n t h e

i n n e r s i d e , t h e v o l u m e o f t h e

v a n e c h 6 m b e r d e c r e a s e s s o

t h e f l u i d i s d i s c h a r g e d f r o m

t h e d i s c h a r g e p o n .

FLOW CONTROL VALVE

Troubleshooting