Checking, Disassembling And Servicing; Checking; Relief Valve (Power Steering); Disassembling And Assembling - wsm Kubota L4100 Workshop Manual

L4100, WSM

4. CHECKING, DISASSEMBLING AND SERVICING

[1] CHECKING

(1) Relief Valve (Power Steering)

[2] DISASSEMBLING AND ASSEMBLING

(1) Steering Post and Steering Controller

IMPORTANT
• Use only the transmission fluid (See page G-9), in no case use mixture of oils of different brands.
• Before disassembling the power steering system hydraulic components, check the performance of
hydraulic pump and power steering using a flowmeter.
Do not disassemble the power steering needlessly.
• After removing or disassembling the power steering hydraulic components, be sure to bleed air.
• if disassembly of power steering is needed, perform disassembly carefully following the instructions
given below.
[Bleeding]
1. Start the engine.
2. Turn the steering wheel slowly in both directions all the way alternately several times, and stop the engine.
Relief Valve Setting Pressure
1. Disconnect the power steering delivery pipe joint bolt.
2. Install the adaptor E and adaptor 58 of relief valve setting
pressure tester to the regulator valve, and then set a thread
joint, cable and pressure gauge.
3. Start the engine and set the engine speed at max. speed.
4. Fully turn the steering wheel to the left or right and read the
pressure when the relief valve functions.
5. Stop the engine.
6. If the pressure is not within the factory specifications, check the
pump delivery line, adjust the relief valve by the adjusting screw
(1), or repair the power steering.
Power steering relief
Factory specification
valve setting pressure
Power steering delivery
Tightening torque
hose joint bolt
Condition
• Engine speed
Maximum
• Oil temperature
40 to 60 °C (104 to 140 °F)
7-S4
STEERING
10.7 to 11.6 MPa
2
109 to 119 kgf/cm
1550 to 1690 psi
49 to 58 N·m
5.0 to 6.0 kgf·m
37 to 43 lbf·ft
9Y1210278STS0004US0
9Y1210278STS0005US0
(EU)
KiSC issued 08, 2012 A