Hyundai r35z-7 Workshop Manual page 34

2. MAJOR COMPONENTS AND FUNCTIONS
1
11
1 Drive shaft assembly
2 Swash plate assembly
3 Rotary group
4 Port plate assembly
5 Spring seat assembly
6 Control piston assembly
7 Gear pump
8 Housing
This is a variable displacement double-piston pump for discharge with two equal displacements
from one cylinder block. Because this is one rotary group, there is only one suction port.
The oil is divided into two equal flows by the control plate in the cover and directed to two
discharge ports provided in the cover.
The discharge pressure directed to the control piston tilts the hanger by overcoming the spring
force.
Since the piston stroke changes according to the tilting angle of the hanger, the flow can be
changed.
The simultaneous tilting angle constant-output control method is employed.
The pilot pump can be connected to the same shaft via a coupling.
5
2
14 6
12
8
19 18
3 4
9 Trochoid pump
11 Oil seal
12 Bearing
14 Stopper assembly
16 Relief valve
18 Spring
19 Spring
2-2
9
7
16
R35Z72MP03