Kubota WSM RCK60-F36 User Manual

2-M8
F2880, F3680, RCK72-F36, RCK72R-F36, RCK60-F36, RCK60R-F36, WSM
TRANSMISSION
(5) Check and High Pressure Relief Valve
■ In Neutral
The cartridge-type check and high-pressure relief
valve consists of pressure poppet (2), check valve seat .
The check and high-pressure relief valves are laid out
facing each other as shown in the figure.
■ When Check Valve Activating
The charge flow coming through the charge port
forces open the low-pressure-line check and high-
pressure relief valve and goes into the low-pressure-line.
Any excessive charge flow goes through the charge
relief valve into HST housing.
W1016420
■ When High Pressure Relief Valve Activating
The check and high-pressure relief valve in the high-
pressure line serves as a high-pressure relief valve. If
the pressure exceeds a high-pressure limit level, the
pressure poppet (2) opens itself against the relief valve
spring (3) force and opens the valve that is located
between the check valve seat (1) and the pressure
poppet (2). Now the flow goes to P2.
If the P3 pressure drops, the relief valve spring forces
the valve seat closed against the pressure. The high-
pressure oil at P3 does not flow to P2 any longer.
As discussed above, the check and high-pressure
relief valve protects engines, pumps, motors, gears and
even the machine itself from overload.
W1016728
(1) Check Valve Seat
(2) Pressure Poppet
(3) Relief Valve Spring
(4) Spring Guide
(5) Check Valve Spring
(6) Valve Plug
P1 :P1 Port
P2 :P2 Port
P3 :P3 Port
Oil temperature
High Pressure Relief Valve
operating pressure
50 to 60 °C
(122 to 140 °F)
33.3 to 35.2 MPa
340 to 359 kgf/cm
2
4833 to 5116 psi
KiSC issued 04, 2006 A

Kubota WSM RCK60-F36 Specifications

General

Brand	Kubota
Model	WSM RCK60-F36
Category	Lawn Mower
Language	English