Great Plains Simba DTX AR Operator Manual - Manual (Page 27)

27 Simba DTX AR
604-108M-ENG
2013-02-08
5. Servicing and Maintenance
The circuit allows for the tines to be
pressurised down into work where a relief
valve allows the tine to trip up if necessary.
In normal operation, oil is locked in the
cylinder circuit at a pressure determined by
the relief valves.
De-pressurising the Circuit
To de-pressurise the circuit, identify and
adjust the following valves on the Tine
Control Manifold.
All valves can be identified by stamped
codes adjacent to each valve (above).
1 Set tractor hydraulics to neutral,
machine raised.
2 Adjust accumulator relief valve ( marked
2 / coloured red) fully anticlockwise.
If necessary, note the number of turns
that it takes for the system to be reset.
3 Adjust relief ( marked 1 / coloured
green) fully anticlockwise. If necessary,
note the number of turns that it takes
for the system to be reset.
4 Set tank return line circuit to float or
down to return oil to tractor.
5 Set main system to float, or allow
oil pressure to be released in both
directions.
6 Refer to pressure gauge on machine.
Ensure it reads zero before attempting
any maintenance. Repeat the above
procedure until gauge reads zero in
all circumstances.
Follow detailed setting sequence on page 28
to reset the system prior to returning to work,
or alternatively revert the above valves back
to their original setting (number of turns).
5.7 Trip Reset Tine Hydraulics
1 - RELIEF VALVE (FAIL SAFE)
TURNING CLOCKWISE INCREASES PRESSURE
3 - SEQUENCE VALVE
TURNING CLOCKWISE REDUCES PRESSURE
5 - FLOW CONTROL VALVE
2 - RELIEF VALVE (ACCUMULATOR)
TURNING CLOCKWISE INCREASES PRESSURE