
20-34
SK714-5 SK815-5 SK815-5 turbo
CONTROL VALVE
1.
Control of operating pressure (unloading valve)
1 - Remove the plug (1) and mount a pressure adapter.
2 - Connect a pressure gauge
E3
(10 bar).
3 - Start the engine and bring it up to high idling with all le-
vers in neutral position.
4 - Check the pressure.
★
Normal pressure: 4.8 bar
tTake care do not operate the equipment levers.
The unloading valve cannot be re-adjusted. If the
pressure differs from the normal value the valve
must be substituted.
2.
Control the operating pressures of the working
equipment
1 - Remove the plug (1) and mount a pressure adapter.
2 - Connect a pressure gauge
E2
(400 bar or 600 bar).
3 - Start the engine and bring it up to high idling.
4 - Check the pressure for each movement with the com-
mand lever at the end of its stroke and with the pressure
stabilised.
To check the pressure of the working equipment,
push the piston to the end of its stroke.
Valve adjustment
★
The unloading valve cannot be re-adjusted, only sub-
stituted.
1.
Adjustment of the main relief valve
If the pressures measured for the working equipment and
machine travel do not fall within normal values, adjust the
main relief valve (1) as follows:
1 - Loosen the lock nut (2) and rotate the adjusting screw
(3).
•
To INCREASE pressure, turn in a CLOCKWISE di-
rection.
•
To DECREASE pressure, turn in a COUNTER-
CLOCKWISE direction.
★
Each turn of the adjusting screw (3) varies the pres-
sure by about 55 bar.
2 - Lock the nut (2).
Nut: 69
±
10 Nm
★
After adjustment, check the adjustment of the main
relief valve with the same procedures as used for
the measurements.
RKSA0180
1
E
3
RKSA0190
1
E
2
RKS01400
A
1
2
3
A
Section A - A
TESTING AND ADJUSTMENTS
CONTROL VALVE
Содержание SK714-5
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