In A4 series tractors you have an open centre hydraulics with
up to three auxiliary valves. The maximum hydraulic flow
is 65 l/min in models A74-A94 and 98 l/min in models
A104-A134.
1.
Valves can be locked easily
- for constant flow or in neutral.
2.
Additionally you can select an option of two
electronically controlled valves for front loader.
3.
In models A104-A134 you get the maximum flow up to 98 l/min
by combining the flow of two pumps by a rocker switch in B-pillar.
Tip
the tractor can be completed with a flow control valve. This valve will be controller
from the rear and it regulates the amount of oil available from the brown valve.
The remaining oil flow can be used at same time to power lift or other services.
With this device you can adjust the speed of a hydraulic motor or/and use
two functions simultanously. See number 2 in page “rear controls”.
HYDRAULICS
ADJUSTING REAR VALVES
2
3
1
15
A Series Quick Guide / HiTech
