IMPLEMENT CIRCUIT (Fig 13)
Some machines require hydraulic oil to operate the
implement lift functions. This can be accomplished
by using a larger charge pump. This pump has a
larger displacement of oil than is needed to replen-
ish the oil lost in the drive circuit. The excess oil not
required to replenish the drive circuit, opens and
passes through the charge relief and is directed to
the implement lift valve. At the implement valve the
oil can be directed to a lift cylinder.
NOTE: It is important to realize that the main circuit
must have enough oil flow and pressure supplied to
it to replenish the oil lost in the drive circuit. Should
the main circuit develop excessive leakage, the
charge relief valve will not be opened and no oil will
flow to the implement circuit.
Figure 13
If the lift control lever remains actuated after the lift cylinder is extended, (Fig 14) the flow from the charge
pump is forced through the implement relief valve and will return to the reservoir.
Figure 14
17
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