PRONAR PRONAR 5110, Руководство оператора

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Section 5: USING THE TRACTOR
5-18
In order to extend single-acting cylinder pull the lever controlling quick coupler to rear in "lifting” setting. In
order to stop the cylinder before it is completely extended move lever to neutral setting.
To retract a single acting cylinder push control lever forward in "lowering" setting.
ATTENTION: Do not keep lever in "lifting” or "lowering” setting if external cylinder has reached the end of its
stroke, because this causes "impact" to transfer valve. Compression of oil by transfer valve causes heating
of oil, which may lead to a hydraulic system assembly malfunction.
ATTENTION: Single acting cylinder may equally be controlled by external hydraulic quick coupler adapted to
double action. However remember back to retract cylinder one must use "floating" setting. To choose setting,
move control lever beyond the "lowering" setting.
Connecting double acting cylinders
In the event of connecting double acting cylinders to quick coupler pairs A-A1, B-B1 or C-C1 then one
must adapt valve 2 (Figure 5-23) to double action. To do this loosen securing nut, and then using
screwdriver screw out valve 2 placed below quick coupler pair to which single acting cylinder shall be
connected and again secure tightening securing nut.
Then raise cover and plug in conduit supplying double action cylinder to upper supplying quick coupler,
and return conduit plug to lower socket of quick coupler of pair set for double sided action, ensuring that it is
properly seated. Check the conduits have enough slack enabling turning the tractor or implement in both
directions. Start control lever, to supply oil under pressure to complete the process of engaging tractor and
implement hydraulics.
ATTENTION: Before proceeding to work check that movement of hydraulically powered
machine assembly corresponds to movement of lever. In the event that it does not,
swap conduits on pair of quick couplers.
In order to extend double-acting cylinder pull the lever controlling quick coupler to rear in "lifting” setting.
In order to retract double-acting cylinder push the control lever forward, beyond neutral setting in "lower”
position.
Moving the lever forward beyond the "lower” setting selects floating setting, which enables free movement
of cylinder in either direction and is suitable while working with such equipment as a snowplough or loader.
ATTENTION: Snap fastener holds lever in selected setting "lifting” or "lowering”. In order to stop the cylinder
before it is completely extended move lever to neutral setting. Lever does not return automatically from
"floating" setting.
ATTENTION: Do not keep lever in "lifting” or "lowering” setting if external cylinder has reached the end of its
stroke, because this causes "impact" to transfer valve. Compression of oil by transfer valve causes heating
of oil, which may lead to a hydraulic system assembly malfunction.
Connecting hydraulic continuous flow accessories
When connecting continuous flow hydraulic optional equipment (e.g. hydraulic motors), connect supply
conduit to the lower quick coupler A1 of the first pair of quick couplers equipped with flow regulation valve,
and a return to D "free drain” quick coupler (Figure 5-22). This enables direct return of oil to tractor hydraulic
system. Quick coupler A1 should be adapted to double action using valve 2 (Figure 5-22) as in the case of
double acting cylinders.
Flow regulation valve enables smooth regulation of through flow intensity or revolution speed of hydraulic
motor with the aid of selection knob 1 (Figure 5-23).
For hydraulic motor to operate it is necessary for control lever to be moved into "lowering” setting.
To stop motor move lever forward from "lowering" setting into "floating" setting. The motor then slows down
until it stops. Never choose "neutral" or "lifting" setting during work of motor, because this will cause rapid
stopping and increase the pressure in hydraulic circuit.