Edition
2018
Workshop Manual
PARK PRO 340 IX
Chapter
3 Steering wheel
Page
28
3.1 Description
3.1.1 Mechanical system
A
B
C
The gear wheel (A) is connected directly to the
steering wheel by means of a steering shaft. A
chain (with cables) (B) connects the gear wheel
(A) to the steering disc (C) installed on the rear
frame.
In this condition the rear frame is forced to steer
in relation to the front frame when the driver uses
the steering wheel.
3.1.2 Hydraulic power steering system
The power steering system is an additional hydraulic system. The main components are
the torque converter or torque booster and the hydraulic pump.
A brief description is provided on the operation of the steering torque converter and the
relative valve connectors. For a complete description, see chapter 4 “Hydraulic System”.
Chapter. 4 -
4.4 - describes how the lift cylinder operates with the steering torque
converter. It also describes how the pressure is divided between the two circuits and
relative adjustments.
Unlike with standard power steering systems (such as those in cars) this system has a
limited capacity. This means that in certain circumstances negative characteristics may
come to light.
At low engine speed, or in situations where additional steering force is required, steering
operation may not be smooth.
The machine should always be in motion when using the steering wheel. Avoid turning the
steering wheel when the machine is stationary with the accessory lowered in the operating
position.
The machine can also be steered when the engine is switched off. However it may require
more effort than for normal machine steering. This may be particularly noticeable when the
ambient temperature is low.
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