Honda HRX217K6HYA Manual page 162

HRX217HYA • HRX217HZA
The oil enters the pump cylinder through the oil inlet port and is discharged through the discharge port by the
reciprocating motion of the pistons. The discharge volume flow rate of the oil changes according to the angle of the
control bowl.
: Oil flow
: Rotation direction
PUMP CONTROL
BOWL
PUMP CYLINDER
INLET PORT
DISCHARGE PORT
<Motor cylinder side>
The oil discharged from the pump cylinder flows into the motor cylinder. The motor cylinder consists of a plate fixed at
an angle and the motor cylinder incorporating five pistons. When the oil enters the inlet side of the motor cylinder, the
pistons are pushed out by oil pressure against the inclined plate surface, causing the motor cylinder to rotate. The
motor speed changes according to the oil volume flow rate from the pump.
PISTON AT BDC
(Bottom Dead
Center)
CASE
PLATE
AXLE
SHAFT
PISTON AT TDC
(Top Dead Center)
From pump
cylinder
PISTON AT BDC
To pump cylinder
(Bottom Dead
Center)
INLET STROKE
(Pistons rise)
MOTOR
CYLINDER
PLATE
MOTOR CYLINDER
AXLE SHAFT
Rotation
direction
PISTON AT TDC
(Top Dead Center)
(Viewed from the plate side)
OPERATION
DISCHARGE
STROKE
(Pistons
compress)
14-7