Hydraulic Pump (Power Steering, Three Point System) - Kubota L4400 Workshop Manual

L4400 , WSM
[3] SERVICING

(1) Hydraulic Pump (Power Steering, Three Point System)

Tractor Manuals Scotland - Please Do Not Copy
Tractor Manuals Scotland
1. Disconnect the draft control rod (18) from the top link bracket
(21).
2. Remove the position control lever (6) and draft control lever (7).
3. Disconnect the draft control feedback rod (2) from the draft
control link 2 (12).
4. Remove the control rod (19) and return spring (9).
5. Remove the position and draft control linkage assembly
mounting screws, and then take out the position and draft control
linkage assembly.
6. Remove the draft control feedback rod stay stopper (20) and draft
control feedback rod stay (1).
(When reassembling)
• Assemble so that the punch mark of the feedback rod stay (1) is
set to the punch mark of the hydraulic arm shaft.
• Securely fit the rod stay stopper (20) into the groove of the
hydraulic arm shaft.
• After reassembling, be sure to adjust the position control
feedback rod and draft control rod (if equipped). (See page 8-
S12, 13.).
• Apply grease to the bushings (14), roller (13), draft control link 1
(11) and disc springs (17).
• Tap in the spring pins (15), (16) so that their split portion as
shown in the figure left.
Tightening torque
Housing Bore (Depth of Scratch)
1. Check for the scratches on the interior surface of the housing
caused by the gear.
2. If the scratches reach more than half the area of the interior
surface of the housing, replace the pump assembly.
3. Measure the housing I.D. where the interior surface is not
scratched, and measure the housing I.D. where the interior
surface is scratched.
4. If the values obtained in the two determinations differ by more
than the allowable limit, replace the hydraulic pump as a unit.
Depth of scratch
(Reference)
• Use a cylinder gauge to measure the housing I.D..
8-S23
HYDRAULIC SYSTEM
23.6 to 27.4 N·m
Control linkage assembly
2.4 to 2.8 kgf·m
mounting screws
17.4 to 20.2 ft-lbs
0.09 mm
Allowable limit
0.0035 in.
W1022485
W1014649
KiSC issued 07, 2007 A