3-M9
B1710 · B2110 · B2410 · B2710, WSM
TRANSMISSION
■
Check and High Pressure Relief Valve
The check and high-pressure relief valve consists of
pressure poppet (2), check valve seat (1), relief valve
spring (3), spring guide (4) and check valve spring (5).
The valve is used to prevent an overload that would
happen at a quick start, sudden stop or even during usual
running. This valve doubles as a check valve.
The check and high-pressure relief valves are laid out
facing each other as shown in the figure.
In neutral, both valves are open and charging oil
enters into the main oil circuit through the valves. (A)
At normal operation, the check valve in the high-
pressure side is closed and it pushes and opens the
another one. An excessive charge flow goes through the
charge relief valve into HST housing. (B)
The check and high-pressure relief valve along the
high-pressure line serves as a high-pressure relief valve.
If the pressure exceeds a high-pressure limit level, the
pressure poppet opens itself against the relief valve
spring (3) force and opens the valve seat that is located
between the check valve seat (1) and the pressure
poppet (2). Now the flow goes from P1 to P2 and P3. (C)
If the P1 pressure drops, the relief valve spring forces
the valve seat closed against the pressure. The high-
pressure oil at P1 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.
W10139670
Oil temperature
Valve operating pressure
50 °C (122 °F)
30.9 to 31.9 MPa
315 to 325 kgf/cm
2
4480 to 4622 psi
(1) Check Valve Seat
(2) Pressure Poppet
(3) Relief Valve Spring
(4) Spring Guide
(5) Check Valve Spring
(6) Valve Plug
(A) In Neutral (Stop)
(B) When Check Valve
Activating (Normal
Operation)
(C) When High Pressure Relief
Valve Activating
KiSC issued 11, 2006 A
Summary of Contents for B1710
Page 1: ...B1710 B2110 B2410 B2710 WORKSHOP MANUAL TRACTOR KiSC issued 11 2006 A ...
Page 7: ...5 B1710 B2110 B2410 B2710 WSM SAFETY INSTRUCTIONS KiSC issued 11 2006 A ...
Page 8: ...6 B1710 B2110 B2410 B2710 WSM SAFETY INSTRUCTIONS KiSC issued 11 2006 A ...
Page 13: ...11 B1710 B2110 B2410 B2710 WSM DIMENSIONS DIMENSIONS KiSC issued 11 2006 A ...
Page 14: ...G GENERAL KiSC issued 11 2006 A ...
Page 61: ...1 ENGINE KiSC issued 11 2006 A ...
Page 62: ...KiSC issued 11 2006 A ...
Page 121: ...2 CLUTCH KiSC issued 11 2006 A ...
Page 138: ...3 TRANSMISSION KiSC issued 11 2006 A ...
Page 163: ...3 S1 B1710 B2110 B2410 B2710 WSM TRANSMISSION 1 TROUBLESHOOTING KiSC issued 11 2006 A ...
Page 164: ...3 S2 B1710 B2110 B2410 B2710 WSM TRANSMISSION KiSC issued 11 2006 A ...
Page 207: ...4 REAR AXLE KiSC issued 11 2006 A ...
Page 208: ...CONTENTS MECHANISM 1 FEATURES 4 M1 KiSC issued 11 2006 A ...
Page 219: ...5 BRAKES KiSC issued 11 2006 A ...
Page 220: ...CONTENTS MECHANISM 1 FEATURES 5 M1 2 OPERATION 5 M2 KiSC issued 11 2006 A ...
Page 232: ...6 FRONT AXLE KiSC issued 11 2006 A ...
Page 267: ...7 STEERING KiSC issued 11 2006 A ...
Page 290: ...8 HYDRAULIC SYSTEM KiSC issued 11 2006 A ...
Page 321: ...9 ELECTRICAL SYSTEM KiSC issued 11 2006 A ...
Page 323: ...9 M1 B1710 B2110 B2410 B2710 WSM ELECTRICAL SYSTEM 1 WIRING DIAGRAM KiSC issued 11 2006 A ...
Page 324: ...9 M2 B1710 B2110 B2410 B2710 WSM ELECTRICAL SYSTEM KiSC issued 11 2006 A ...