Kubota WSM B1710 Workshop Manual page 275

B1710 · B2110 · B2410 · B2710, WSM
Operation of Relief Valve
This power steering is equipped with a direct-acting
relief valve to restrict the maximum pressure in the
hydraulic circuit and to prevent breakage of the hydraulic
equipment.
When the pressure in the hydraulic circuit exceeds
the relief valve setting pressure in such a case that the
maximum steering angle of the front wheels is reached or
road resistance to the front tires is too great, the spring
(3) is compressed to generate a gap between the poppet
(4) and the valve housing (5). The pressure-fed oil flows
to tank port through the gap so that pressure rise is
restricted.
The relief valve setting pressure can be adjusted by
turning the adjusting screw (1).
(1) Adjusting Screw
(2) Lock Nut
(3) Spring
7-M7
STEERING
(4) Poppet
(5) Valve Housing
W10142250
KiSC issued 11, 2006 A