Hyundai HX145 LCR, Manual

Page: 117 / 702

2-65
Parking brake Parking brake
Running Running
When the pressurized oil is supplied from
the valve, the spool of brake valve in the
hydraulic motor assembly actuates to open
the passage to the parking brake and the
pressurized oil is introduced into cylinder
chamber (a) which is composed of the
spindle of reduction gear assembly and
piston (12). When the hydraulic pressure
reaches 9.5 kgf/cm
2 or more, it overcomes
the force of spring (13) and shifts piston
(12). With shift of piston (12), no pressing
force is applied to mating plate (16) and
friction plate (15) and movement of fric-
tion plate (15) becomes free. Whereby the
brake force to the cylinder in the hydraulic
motor assembly is released.
13 12 101 a 15 16
Stopping Stopping
When the pressurized oil from the brake
valve is shut off and the pressure in cyl-
inder chamber (a) drops 9.5 kgf/cm
2 or
less, piston (12) will return by the force of
spring (13). Piston (12) is pushed by this
force of spring (13), and mating plate (16)
and friction plate (15) in free condition are
pressed against the spindle of reduction
gear assembly. The friction force produced
by this pressing stops rotation of the
cylinder and gives a braking torque 19.7
kgf
·
m to the hydraulic motor shaft. Note
that oil control through a proper oil pas-
sage ensures smooth operation.
13 12 101 a 15 16
14092TM08
14092TM09
(3) (3)
①
②