Fig. 4-3
Fig. 4-4
4.6
HYDRAULIC CONNECTION.
The hydraulic hoses between machine and tractor are equipped with 1/2" ISO male quick-couplers.
Discharge the oil pressure before you connect the oil hoses. Use the tractors' hydraulic lever.
To make sure that the balewrapper works properly, the tractors' oil pressure has to be at least 180
bar. The oil flow should be 15 - 25 litres per minute.
The counter pressure on the return must be as low as possible, and not exceed 10 bar. This should
be measured with a gauge. It is recommended to use one single-working hydraulic outlet and arrange
a free return circuit to the oil tank. If you are unsure of what oil pressure the tractor gives, or what oil
pressure the balewrapper receives, please contact your machinery dealer. Generally all tractors have
got some counter-pressure in their hydraulic return systems. Some tractors have more than others.
Hose with red cap shall be connected to pressure, (P), and hose with blue cap to the return.
(T).
(See fig. 4-3).
4.7
OPEN AND CLOSED CENTRE HYDRAULIC SYSTEM.
(See also chap. 14.1).
With the ball valve you can choose between a hydraulic system with open or closed centre. Almost
all tractors have a hydraulic pump that gives a fixed oil flow per revolution. (Open centre). The valve,
(with the red handle), shall then be in open position. Some tractors, (like f.i. John Deere), have an oil
pump with variable volume per revolution. (Closed centre). The ball valve shall then be in closed
position. (See fig. 4-4).
* Emergency stop: see chapter 2.1
12
Содержание AUTO WRAP 1200 EH
Страница 40: ...HAVE YOU GOT ENOUGH TRAINING ABOUT THE MACHINE FROM YOUR DEALER YES NO 44...
Страница 41: ...45...
