Valtra 900 - F 5. Operation of auxiliary hydraulics

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F. Operating instructions
F 5. Operation of auxiliary hydraulics
2
1
65---49
Two auxiliary hydraulic valves are fitted as standard.
Single---lever control is used for these valves. Quick action
couplings are mounted at the rear of the tractor (1, as
standard 4 pcs). The working pressure is 18 MPa with a
37 l pump and 19 MPa with a 52 l pump.
The lower quick couplings are for the inner valve and the
uppers for the outer valve.
The volume of hydraulic oil available for the auxiliary
hydraulics is given in the “Technical Specifications”, see
page 106.
As extra equipment two extra valves for auxiliary
hydraulics can be fitted on the hydraulic system in
addition to the two supplied as standard. An extra valve
for a trailer brake can also be fitted.
CAUTION: Take great care if using unfamiliar trailers or
implements as the oil in the cylinder can contaminate
the oil in the hydraulic system of the tractor.
If the external hydraulics are used extensively it is
recommended that a return filter should be mounted in
the line (extra equipment).
An auxiliary hydraulic 1/2 inch quick ---action coupling
return connection is fitted as standard (2).
F 5.1. Valves adjusting for single--- or
double acting
65---50
When the adjustment knob under the inner valve has been
turned up the valve is double---acting, and when it is
turned down the valve is single---acting.
65---50,1
1
2
3
4
Pressure acts in the quick---coupling 1 in the
single---acting position of the inside valve (e.g. tipper
control) when the lever is pulled towards the driver
(direction 1).
When pulling the lever towards the numbered arrow,
pressure acts in the similar numbered quick---acting
coupling. The inside valve has to be adjusted into
double---acting.