Honda HRX217K6HYA - Page 162

14-7
HRX217HYA • HRX217HZA OPERATION
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.
<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.
INLET PORT
DISCHARGE PORT
PLATE
MOTOR CYLINDER
PUMP CYLINDER
AXLE SHAFT
PUMP CONTROL
BOWL
: Oil flow
: Rotation direction
CASE
PLATE
MOTOR
CYLINDER
To pump cylinder
From pump
cylinder
AXLE
SHAFT
DISCHARGE
STROKE
(Pistons
compress)
PISTON AT BDC
(Bottom Dead
Center)
PISTON AT BDC
(Bottom Dead
Center)
INLET STROKE
(Pistons rise)
PISTON AT TDC
(Top Dead Center)
PISTON AT TDC
(Top Dead Center)
Rotation
direction
(Viewed from the plate side)