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| Illustration 1 | g00403398 |
(1) Hydraulic manifold (2) Outlet (3) Inlet | |
The priority valve for the generator is located inside hydraulic manifold (1). Priority valve (9) maintains constant generator speed even when there is some fluctuation in engine speed. Hydraulic manifold (1) is at the inlet to the generator. The hydraulic manifold controls the operation of the generator by controlling hydraulic flow.
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| Illustration 2 | g00381452 |
(1) Hydraulic manifold (2) Outlet from the manifold (3) Inlet to the manifold (4) "G1" port (5) "G2" port (6) "A" port to generator (7) "B" port from generator (8) Two-way valve (9) Priority valve (10) Relief valve (11) "LS" port (12) Flow control orifice (13) Orifice (14) Decompression valve (15) Anticavitation check valve (16) Orifice | |
Hydraulic manifold (1) includes both a two-way valve and priority flow control valve (9). The two-way valve (8) directs the oil to the priority valve or to the tank. When the generator is not active the two-way valve directs the oil to the tank. Hydraulic oil travels from the hydraulic manifold to the tank through hose (2). When the two-way valve directs oil to priority valve (9), the priority valve controls the amount of hydraulic oil that is sent to the generator. Excess oil is sent to the motor that is driving the generator in order to keep the generator operating at a constant speed. The excess oil allows the operator to reduce the engine speed without affecting the speed of the generator. The excess oil from the motor that is driving the generator is sent to the tank.
The hydraulic manifold includes relief valve (10). The relief valve prevents the buildup of the hydraulic pressure. The buildup of hydraulic pressure could damage the motor that is driving the generator. The relief valve is an adjustable relief valve in order to change the relief setting on the system.
Manifold Components
(4) "G1" - This is the gauge port that is used to check the inlet pressure of the manifold. This port is also used to find the system pressure. The system pressure is the pressure which is required to operate a certain work load. The system pressure is the pressure that is required to turn the generator at a given rpm under a rated load.
(5) "G2" - This is the test port that is used to check the pressure that returns to the tank. The pressure that returns to the tank is the back pressure.
(8) "SV02" - This solenoid valve is the valve that turns the generator ON or OFF. The valve is wired to the grapple/magnet switch that is in the cab. The grapple/magnet switch sends power to the solenoid valve when the switch is in the GENERATOR position.
(9) "FCS01" - This is the compensator that is built into the manifold. This valve needs no adjustments.
(10) "RV01" - This is the relief valve that sets the system at the rated load pressure. When you set the relief valve find the system pressure. Turn the relief valve half of a turn in the clockwise direction. In order to find the system pressure, refer to "G1". When the stem of the relief valve is adjusted in the clockwise direction, the system pressure will increase. When the stem of the relief valve is adjusted in the counterclockwise direction, the system pressure will decrease.
(11) "LS" - This is a gauge port that is used to check the differential pressure. The pressure at this port does not need to be checked unless there is a problem with the operation of the system.
(12) "FCNV01" - This is the adjusting stem which is used to set the speed of the generator. To increase the speed, the stem is turned in the counterclockwise direction. To decrease the speed, the stem is turned in the clockwise direction.
(13) "NV02" - This stem is used to adjust the bounce when the generator is turning at the proper rpm. The proper rpm is between 1750 and 1800 rpm. The adjustment will be very slight. After the bounce has been removed, check the rpm of the generator again.
(14) "SV01" - This is the soft start solenoid valve. This valve is wired to the grapple/magnet switch through normally closed contacts of delay timer "TR106". The soft start solenoid valve is energized when the grapple/magnet switch is moved to the "MAGNET" position. The soft start solenoid valve is energized at the same time as the "SV02" valve. For approximately 3 seconds, hydraulic oil is diverted from the generator motor. Since the hydraulic oil is diverted from the generator motor, the impact that is put on the generator drive coupler is softened.
(15) "CV01" - This is the anticavitation check valve that is built into the manifold. This valve needs no adjustments.
(16) "OR02" - This is an orifice that needs no adjustments.