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Kubota BX23, BX23S, BX24, BX25, BX25D Steering - Adjust and Service
Kubota BX23, BX23S, BX25, BX25D Steering - Check and adjust
Checking relief valve operating pressure - After setting 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. Disconnect the power steering
hose L (or R) from steering controller, and set a pressure gauge and
hose. Hose and adapter size 9/16-18 UNF, 37 degrees flare. Start the
engine and set at maximum speed. 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 position by operation force. Operation force
(Steering wheel) Approximate - 9.8 N / 2.2 lbf. Relief valve operating
pressure (Kubota BX23, BX23S, BX24, BX25, BX25D) - 8.34 to 8.82 MPa /
1210 to 1280 psi.
Kubota BX23, BX23S, BX24, BX25, BX25D Steering - Disassembling and assembling
Power steering cylinder
Removing adapter and
tie-rod - Remove the cylinder hose adapters. Remove the tie-rods from
piston rod. Remove the cylinder holder and internal snap ring. After
reassembling the tie-rod, be sure to adjust the toe-in. Tie-rod screw
(Kubota BX23, BX23S, BX24, BX25, BX25D) - 74 to 84 Nm / 55 to 62 lbf-ft.
Disassembling steering cylinder - Carefully clamp the cylinder in a
vise. Push one of the guide assembly to inside of cylinder tube. Drill a
hole on the cylinder tube just over the snap ring. Hole - 2.5 mm
diameter / 0.098 in. diameter. Take a little screwdriver and lift off
the snap ring from its groove. Simultaneousness support this action by
pushing from the outside of the cylinder tube with another little
screwdriver or another tool. Push out the piston rod assembly and take
off the guide assembly. Seals must be exchanged after disassembling.
Apply transmission fluid to the exchanged seals. Enter the piston rod
and block the guide assemblies with the snap rings.
Separating power steering controller
Removing battery - Remove the
under panel. Disconnect the negative cable from the battery. Disconnect
the positive cable from the battery and remove the battery. Removing
steering wheel - Remove the steering wheel cap. Remove the steering
wheel mounting nut and remove the steering wheel. Steering wheel
mounting nut - 20 to 25 Nm / 15 to 18 lbf-ft. Removing upper panel -
Disconnect the main switch and combination switch. Remove the hand
accelerator lever grip, cruise control lever knob, and tilt lever grip.
Open the bonnet, and remove the upper panel mounting bolts. Remove the
upper panel. Removing steering controller - Disconnect the power
steering hoses from the steering controller. Remove the steering
controller mounting screws and remove the steering controller. Be sure
to connect the power steering hoses to their original position, and
tighten them to the specified torque. Power steering hose - 24 to 27 Nm
/ 18 to 20 lbf-ft.
Separating power steering cylinder
Removing bonnet - Remove the front guard. Open the bonnet. Disconnect the headlight harness from the headlights and bonnet. Disconnect the bonnet guide rod from the bonnet. Disconnect the L.H. and R.H. bonnet brackets from the frame. Remove the bonnet. Removing front axle assembly - Remove the power steering hose clamp. Place the garage jack under the front axle. Remove the cotter pin. Remove the slotted nut of center pin and separate the front axle from the frame. Disconnect the power steering hoses. After mounting the front axle assembly to the frame, be sure to adjust the front axle rocking force. Installing the cotter pin, be sure to split the cotter pin like an anchor. Power steering hose - 24 to 27 Nm / 18 to 20 lbf-ft.
Removing power steering cylinder
Remove the cotter pin and remove the slotted nut for tie-rod. Remove the power steering cylinder mounting screws and remove the power steering cylinder with tie-rod. Tighten the slotted nut. If the slot and pin hole do not meet, tighten the nut until they do meet, and install the cotter pin. Tie-rod slotted nut - 18 to 34 Nm / 13 to 25 lbf-ft. Power steering cylinder mounting screw (Kubota BX23, BX23S, BX24, BX25, BX25D) - 48 to 55 Nm / 36 to 41 lbf-ft.
Kubota BX23, BX23S, BX24, BX25, BX25D Steering - ServicingSteering cylinder
Checking steering cylinder I.D - Measure the steering cylinder I.D. with a cylinder gauge. If the cylinder I.D. exceeds the allowable limit, replace the cylinder barrel. Steering cylinder I.D - 40.000 to 40.062 mm / 1.5748 to 1.5772 in. Checking clearance between rod and guide - Measure the rod guide I.D. with a cylinder gauge. Measure the rod O.D. with an outside micrometer, and calculate the clearance. If the clearance exceeds the allowable limit, replace as a unit. Clearance between rod and guide - 0.020 to 0.070 mm / 0.00079 to 0.0027 in.
Checking power steering oil flow
Disconnect the power steering controller hose (inlet) from the power steering pipe. Fix the inlet flow meter hose to the power steering pipe and the flow meter. Fix the flow meter return hose to the transmission fluid filling port and the flow meter. Measure the flow volume of power steering. If the flow volume varies from the specification, replace the priority valve then take measurement again. Power steering oil flow - 8.0 L/min. Engine speed Specification 1500 min-1 (rpm). After measuring the flow volume, remove the flow meter then reassemble the hydraulic pipe to the original position.
- Kubota BX23, BX23S, BX24, BX25, BX25D Transaxle adjusting
- Kubota BX23, BX23S, BX24, BX25, BX25D Transaxle service
- Kubota BX23, BX23S, BX24, BX25, BX25D hydrostatic transmission
- Kubota BX23, BX23S, BX24, BX25, BX25D Front axle
- Kubota BX23, BX23S, BX24, BX25, BX25D hydraulic system
- Kubota BX23, BX23S, BX24, BX25, BX25D electrical system
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