Hydraulic Pump - Kubota ZD221-48 Workshop Manual

ZD221, WSM HYDRAULIC SYSTEM
2. HYDRAULIC PUMP
(3)
3GZAAAD8P002A
The oil pump in this transmission is a trochoid pump.
Inside the pump body, the 6 lobe inner rotor (2) is
eccentrically engaged with the 7 lobe outer rotor (1). The
inner rotor is driven by the input shaft, which in turn rotate
the outer rotor.
(1) Outer Rotor (4) Input Shaft
(2) Inner Rotor (5) Charge Pump Cover
(3) Center Cover
W1012875
4-M2