Operation - Hitachi ZW180 Technical Manual

COMPONENT OPERATION / Hydraulic Fan Motor

OPERATION

The fan motor is a swash plate type axial piston motor,
and converts pressure oil from the fan pump into
rotation.
Operational Principle of Hydraulic Motor
1. Pressure oil from the fan pump is routed to
cylinder block (4) through valve plate (6).
2. Pressure oil into cylinder block (4) pushes piston
(3).
3. Although force F1 acts on thrust plate (2), as
thrust plate (2) is fixed to output shaft (1) at angle
⍺°, force F1 is divided into component forces F2
and F3 .
4. Resultant force F3 is a rotation force and rotates
cylinder block (4) via piston (3).
5. As cylinder block (4) is conncted to shaft (1) by
the splines, output shaft (1) rotates.
T3-3-4