Hinowa LightLift 15.70 3S, Technical Course Booklet

Page: 58 / 137

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This second speed system is also controlled by an auto2speed valve, in case of
a higher torque is required to the drive gear motors, such as driving uphill, the
second speed line pressure will raise and if it overcomes the calibrated
maximum pressure (30 bar) it will automatically open the auto2speed valve
reducing the gear rate and the tracks speed.
Auto2speed allows to manage automatically the available power, providing on
demand a higher torque (with a slower speed) or an faster speed (with a lower
torque).
Second speed activation oil, coming from second speed valve coil, is sent to
both drive gear motors through the second speed manifold, that is installed on
the undercarriage base
SMALLER CHAMBER:
 FASTER SPEED
 SMALLER TORQUE
BIGGER CHAMBER:
 SLOWER SPEED
 HIGHER TORQUE
SECOND SPEED
MANIFOLD