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STRUCTURE, FUNCTION AND MAINTENANCE STANDARD
2) When pressure in chamber MA has become
high (when rotating counterclockwise)
•
When the travel is stopped (or when traveling
downhill), chamber MA in the outlet port circuit is
closed by the check valve of the counterbalance
valve, but the pressure at the outlet port rises be-
cause of inertia.
•
If the pressure goes above the set pressure, the
force produced by the difference in area between
D1 and D3 [x/4(D3
comes the force of the spring and moves the
poppet to the left, so the oil flows to chamber MB
in the circuit on the opposite side.
10-102
– D1
) x pressure] over-
2
2
TRAVEL MOTOR
PC600, 600LC-7
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