Checking, Disassembling And Servicing; Checking; Relief Valve; Hydraulic Pump For Power Steering - Kubota B2301 Workshop Manual

B2301, B2601, WSM

4. CHECKING, DISASSEMBLING AND SERVICING

[1] CHECKING

(1) Relief Valve

(2) Hydraulic Pump for Power Steering

• See page 7-S6.
Relief Valve Operating Pressure
1. Disconnect the power steering hose L.H. (or R.H.) from steering
the power steering cylinder, and set a pressure gauge and
cable.
(Reference)
• Hose and adaptor size: 9/16-18UNF, 37 ° flare.
2. Start the engine and set at maximum speed.
3. Fully turn the steering wheel to the left (or right) to check the
feeling which the steering wheel lightly locks. Read the relief
valve operating pressure when the steering wheel to the
above-mentioned lock
approximately 9.8 N (1 kgf, 2.2 lbf) of outer.
NOTE
• After set a pressure gauge, be sure to bleed air.
• Note that the pressure value changes by the pump action
of the power steering controller when the steering
operation is continued after the steering wheel is lightly
locked and accurate relief valve pressure cannot be
measured.
(Bleeding air in power steering circuit)
• Start the engine.
• Turn the steering wheel slowly in both directions all the way
alternately several times, and stop the engine.
Relief valve operating
Factory specification
pressure
Power steering hose for
Tightening torque
power steering cylinder
(1) Power Steering Hose (R.H.)
(2) Power Steering Cylinder
6-S5
STEERING
position by operation
11.5 to 12.5 MPa
118 to 127 kgf/cm
1670 to 1810 psi
24 to 28 N·m
2.5 to 2.9 kgf·m
18 to 20 lbf·ft
(3) Power Steering Hose (L.H.)
9Y1211156STS0004US0
9Y1211156STS0005US0
KiSC issued 11, 2014 A
force at
2