26
Fan with PTO-shaft driven pump
The PTO-shaft driven pump drives the hydraulic
motor of the fan.
The flow control valve on the fan is used to regu
-
late the oil flow and thus the fan speed.
A pressure gauge shows the operating pressure
in the hydraulic system. This pressure rises
proportionally to the fan speed and is limited to
200 bar by the pressure relief valve.
The pressure relief valve inside the hydraulic
valve block protects the components and a
check valve enables coasting down of the fan
when the PTO-shaft is switched off.
The oil in the return flow is guided through the
cooler and a filter back into the oil tank.
A pressure gauge in the return flow monitors the
dynamic pressure. With a return flow pressure of
more than 2 bar the filter needs to be replaced.
Oil tank with filter
Technical data
PTO-shaft speed:
1.000 rpm
Fan speed:
max. 4000 rpm
Adjusting the fan speed.
With the engine running switch on the PTO-shaft
and run the tractor engine with the speed used
for drilling.
Set the desired fan speed by the setscrew on
the flow control valve.
In order to avoid disturbances during drilling and
damage to the fan drive, set the alarm at the fan
speed in the DrillManager, see DrillManager
instructions.
The radiator fins must be cleaned at
regular intervals, as otherwise the cool-
ing and fan air flow will be reduced. The
hydraulic oil could overheat and cause
clogging of the seed hoses.
During assembly the PTO-shaft driven
pump is plugged on the drive stub. With
the brackets the pump must be tightly
fastened to the tractor, but without
distortion.
The pump must not move during opera-
tion, since this would cause damage to
shaft and bearings.
Checks and maintenance
¾
Ensure a free flow return pressure of
max. 2 bar.
¾
Check the oil level.
¾
Clean fan protection grille and radiator fins
from dirt.
¾
Clean fan wings from dirt.
¾
Change oil and filter, if required.
¾
Retighten the clamping taper on the fan shaft
(see chapter Fan Flange).
