Kalmar ContChamp DRD S Series, Technical Handbook

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ContChamp DRD-S
Technical Handbook
Steering system
Description
20 S. Grupp 70
9407
04-10
Priority valve
The priority valve apportions the flow of fluid from the pump H2
so that a sufficient flow always goes to the steering valve.
The priority valve is built into a valve block that also contains the
pressure regulator valve for the servo system.
Steering valve H8-LS is fed with a dynamic load signal, a flow of
2-3 l/min. continually circulates from the priority valve connection
H10-LSO to the control valve. When the steering wheel is turned
this flow is shut off and pressure builds up. The pressure acti-
vates pump H2 and resets priority valve H10c for feeding of the
steering valve H8 (P).
When the steering wheel is not turned, all the flow from the pump
goes to main valve of the working hydraulics, H13, with the ex-
ception of a minor flow that feeds the servo system via pressure
reduction valve H10a.
The pressure reduction valve H10d is adjustable and determines
the steering pressure.
Priority valve
Direction
of travel
H10. Priority valve
H40. Solenoid valve, disconnection of
H3b feed to LIFT and EXTENSION
in transport mode
H42.Solenoid valve, loading of pump H3b
for feeding attachment
KL1420-D
H10
H40
H42