Hydraulics QUANTUM TIC
11-64 10/04
3.9 2-speed motor
Design
1 Geroler @ Rotor
2 Axial distributor valve
3 Universal drive shaft (drive)
4 Output shaft and bearing
The 2-speed motor works according to the Orbit principle (e.g. Danfoss
steering). The 2-speed motor is switched over by a 3/2 way valve.
When the 3/2 way valve is actuated, opposite chambers inside the motor
are connected (80 cm
3
, 95 cm
3
on QUANTUM 6800 P/S).
This results in a high output speed and a low torque. When the 3/2 way
valve is not actuated, all chambers inside the motor are active (160 cm
3
,
195 cm
3
on QUANTUM 6800 P/S). This results in a low output speed and
a high torque.
Note If the motor cannot be switched to a “faster” speed, the following tests
should be carried out:
• Return pressure
• Pressure in the leakage line (thin line)
The pressure in the leakage line should be at least 7 bar below the return
line pressure since otherwise the motor does not switch over to the
“faster” speed.
13 2-speed motor
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