Great Plains P17921E Operator Manual User Manual
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UniPress
Operating Instructions
5. Servicing and Maintenance
With the machine off the ground,
1. Pressurise the wings to unfold. As the
unfolding begins the pressure reading
on the gauge will drop. When the
wings have fully unfolded the pressure
reading will start to climb. Keep
pressurising the wings until the gauge
has stabilised at the pre-set pressure.
The standard factory setting is 15 bar.
2. If the system needs adjusting:- Partially
fold the wings & hold them in this
position. To adjust the pressure utilise
valve 3 (shown in Fig. 5.03). Unscrew
the adjusting screw until no resistance
can be felt (almost fully unscrewed
position). Unfold the wings fully as
before, checking the gauge reading.
Maintain hydraulic pressure unfolding
wings & adjust the screw whilst
pressurising.
•
Turning adjuster clockwise increases
pressure.
•
Turning adjuster anti-clockwise
decreases pressure.
Once the desired pressure is achieved lock
the valve. As a check, partially fold the wings,
stop, and then unfold again maintaining
pressure until the gauge stabilises at your
desired setting.
Fig. 5.03: Manifold Block