Gason NT8000, Operator'S & Parts Manual

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Operation
16
Priming the HydraTILL Circuit:
Loosen the last hydraulic hose on the outside
ends of each chain of hoses. This will assist in
purging all air from the system. Loosen the JIC
fitting on the hose, hold the fitting on the cyl-
inder firm. Once the implement is ready to be
primed, lower so that the implement is resting
on the shanks/ground tool and creep forward,
lowering the implement further as you go.
Continue until tines are at full jump height
(tine cylinders fully retracted). Attach the tine
hydraulic circuit to a remote port on the trac-
tor. With the tractor in neutral and the hand-
brake disengaged, slowly begin to introduce
hydraulic oil to the system. As the tines begin
to return to working position they will pull the
tractor backwards. Someone must remain in
the tractor at all times. Continue until oil be-
gins to emerge from the loosened fittings. Nip
up fittings and continue to force oil into the
circuit until tines have returned to their work-
ing position i.e. the cylinders are extended. In-
crease hydraulic pressure until desired work-
ing pressure is reached.
The following is a table shows theoretical val-
ues of desired breakout at 710mm underframe
clearance (UFC) and the corresponding hy-
draulic pressure.
Breakout [lbf] at
710mm UFC.
Hydraulic
Pressure [psi]
310 586
400 756
500 946
600 1135
680 1286
40 bar (580 psi) precharge
Note: As a rule of thumb, tine breakout force in
pounds is approximately equal to circuit pres-
sure (psi) divided by 2.
Note: As the under frame clearance increases,
so does the pressure necessary for maintaining
a given breakout.
Pre - operation Checklist

Read and understand the operator’s man-
ual and all safety decals.

Read and understand tractor operator’s
manual.

Inspect all tyres are in good working condi-
tion and correct pressure.

Inspect all points & hardware are in good
working condition.

Check that all hardware is in place and is
tight. Refer to “Torque Specifications” sec-
tion for assembly torques.

Check that the hydraulics are primed and
bled of all air.

Check that all hydraulic hoses are routed to
accommodate working angles between
implement members joined by pivots,
checking for potential pinching, fouling or
rubbing of hoses.

Check that all accessories do not foul with
implement wheels or framework through
their working/transporting range.

Check all hydraulic connections for leaks.

Check safety tow chain is fitted to imple-
ment.