Doosan D15S-5, Спецификации систем эксплуатации, испытания и регулировка

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Vehicle Systems Hydraulic System Operation
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Tilt Section
• The tilt spool contains an internal plunger which acts to stop tilt forward actuation when the battery power is
off.
• Tilt Forward: When the seated operator shifts the lever forward, pressure is applied to the head of the tilt
cylinder, and the forks tilt forward. Oil is directed from the high pressure parallel passage past the load
check valve, past the spool metering notches, and cylinder head.
• Simultaneously, the high pressure acts on the end of the tilt lock plunger to move it towards the spring end
of the spool. This plunger movement opens additional spool metering notches which control oil flow from
the rod end of the cylinder to the tank return line.
• Tilt Back: When the seated operator shifts the lever back, the high pressure oil from the parallel passage is
directed past the load check valve, past the spool metering notches, and to the rod side of the cylinder.
Exhaust oil from the head side of the cylinder is directed past the spool metering notches to tank.
TILT LOCK
PLUNGER