Kubota WSM STa-30, Workshop Manual

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9-S9
ST
α
-30 · ST
α
-35, WSM HYDRAULIC SYSTEM
[2] DISASSEMBLING AND ASSEMBLING
(1) Hydraulic Pump
IMPORTANT
■
• The hydraulic pump is precision machined and assembled: if disassembled once, it may be unable to
maintain its original performance. Therefore, when the hydraulic pump fails, replacement should be
carried out with the hydraulic pump assembled except when emergency repair is unavoidable.
• When repair is required, follow the disassembly and servicing procedures shown below with utmost care.
• Be sure to test the hydraulic pump with a flowmeter before disassembling.
• After reassembly, be sure to perform break-in operation and ensure that there is nothing abnormal with
the hydraulic pump.
Hydraulic Pump
1. Open the hood and remove the side cover (RH).
2. Disconnect the power steering delivery hose (3), drain hose (1),
inlet hose (2) and 3P hydraulic delivery pipe (4).
3. Remove the hydraulic pump assembly (5).
(When reassembling)
• Apply grease to the O-ring of hydraulic pump assembly.
W1013560
Cover, Side Plate and Gear
1. Secure the hydraulic pump with a vise, and remove the cover.
2. Remove the side plate (4).
3. Remove the drive gear (3) and driven gear (2) from the casing
(1).
(When reassembling)
• Take care not to damage the O-ring.
• Align the holes of the cover and casing.
• Install the side plate, noting its location and direction.
• Install the gears, noting its direction.
W1013702
Oil Seal
1. Remove the internal snap ring (2), and remove the oil seal (1).
(When reassembling)
• If the oil seal is defective, worn or scratched, replace it.
W1013888
Tightening torque
Power steering delivery
hose joint screw
49.0 to 58.8 N·m
5.0 to 6.0 kgf·m
36.2 to 43.4 ft-lbs
(1) Drain Hose
(2) Inlet Hose
(3) Power Steering Delivery Hose (4) 3P Hydraulic Delivery Hose
(5) Hydraulic Pump Assembly
(1) Casing
(2) Driven Gear (3) Drive Gear
(4) Side Plate
(1) Oil Seal (2) Internal Snap Ring
KiSC issued 11, 2006 A