Hydraul Connections; Pressure Plate; Banjo Fitting - Stiga Park 2WD Workshop Manual

machine. This is particularly noticeable during
cold weather.
Mainly, the hydraulic assisted system works
similar to the mechanical system. The different
is a torque booster (D), atttached to the steering
shaft between the steering wheel and the
sprocket (A).
A oil flow from the HST is flowing through the
torque booster via a filter.
As the driver turns the steering wheel, there
occour a pressure drop over the torque booster.
The pressure drop, multiplied with the flow,
gives a moment (Ma), which is added to the
moment from the driver (Md) and applied on the
sprocket (A) as a moment (Ms).
The following items are shown in the figure:
A Sprocket of driving the steering chain.
D Torque booster.
Mh Steering power (moment) from the
hydraulic transmision.
Md Hand power (moment) from the driver.
Ms The sum of Ma and Md as steering power
(moment on sprocket A).

Hydraul connections

The hydraul lines have two alternative
connections:
• Pressure plate with O-rings around the tubes.

• Banjo fitting.

Pressure plate

Always mount new O-rings when assembling.
Banjo fitting
The connection have no gaskets.
Always tighten the nipples with the correct
tightening when assembling. See the figure.
WORKSHOP MANUAL
PARK
Chapter
3 - Steering
35-42 Nm
A
Ms
Md+Mh=Ms
EDITION
2018
Md
35-42 Nm
D
Mh
30-37 Nm
Page
3