System Operation System 3.pdf

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Systems Operation 320D, 323D, 324D, 325D, 328D LCR and 330D Excavators Tool Control System

System 3: 2-Pump, 1-Way

SMCS - 5000

S/N - A3R1-UP

S/N - AZP1-UP

S/N - B6H1-UP

S/N - DHK1-UP

S/N - EDX1-UP

S/N - FXK1-UP

S/N - GTN1-UP

S/N - JJG1-UP

S/N - JLP1-UP

S/N - MEY1-UP

S/N - MWP1-UP

S/N - NBD1-UP

Shutdown

Previous Screen

Product: EXCAVATOR

Model: 330D L EXCAVATOR B6H

Configuration: 330D L Excavator B6H00001-UP (MACHINE) POWERED BYC9 Engine

Media Number -RENR7389-04 Publication Date -01/04/2006 Date Updated -20/04/2006

i02481406

Página 1 de 4330D L Excavator B6H00001-UP (MACHINE) POWERED BY C9 Engine(SEBP4...

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Illustration 1 g0123931

(1) Work tool solenoid valve

(2) Line for Work tool (Return)

(3) Line Relief Valve

(4) Line for Work tool (Supply)

(5) Proportional solenoid valve for negative flow control

(6) Main Control Valve

(7) Auxiliary Control Valve

(8) Attachment Control Valve



(11) Machine ECM

(12) Foot Switch

(13) Right Pump

(14) Left Pump

(15) Pilot manifold





System 3 is used for work tools that require pressurized hydraulic flow in one direction.

(16) Pilot Pump

(17) Hydraulic Tank


(12) Foot Switch for the work tool





The work tool is operated by foot switch (12) that is located in the cab. Foot switch (12) provides a

signal to machine ECM (11). When the ECM receives a signal, the ECM sends power to work toolsolenoid valve (1) .

Pilot pump (16) supplies oil to pilot manifold (13). When the hydraulic activation lever is moved tothe UNLOCK position, pilot oil flows from pilot manifold (13) to work tool solenoid valve (1).When foot switch (12) is depressed, pilot oil flows to both auxiliary control valve (7) and toattachment control valve (8). The pilot oil will shift the spool in of the valves to the DOWNWARD

position. This allows oil from right pump (15) to flow through attachment control valve (8). Thisalso allows oil from left pump (14) to flow through the auxiliary control valve (7). The hydraulic oilfrom the two pumps combines after the oil passes through both valves. The pump oil flows throughthe line for the work tool (4) to the work tool. Return oil flows through the line for the work tool (2)

back to hydraulic tank (17) .

The machine ECM sends a signal to the proportional solenoid valve for negative flow control (6). Negative flow control pressure in the center bypass passage is blocked when the valve spools shiftDOWNWARD. The machine ECM has programmed parameter values "NAME", "MAX DIAL", and"MIN DIAL" for flow and pressure for the work tool. The machine ECM calculates the negativeflow control pressure that will be supplied to the pump regulator. The negative flow control pressureforces the swashplate in right pump (15) and left pump (14) to the correct angle to limit the flow and

pressure to the work tool.

Note: The pressure setting for relief valve (3) must be reset to the specification of the supplier for

each work tool that is used. Relief valve (3) is adjusted manually and the valve should be set 3450kPa (500 psi) to 4825 kPa (700 psi) above the operating pressure of the work tool.


(1) Work tool solenoid valve

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System Operation System 3.pdf

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