HYDRAULIC SYSTEM
L3540-II, L4240-II, L5040-II, L5240-II, L5740-II , WSM
8-S14
5. DISASSEMBLING AND ASSEMBLING
[1] HYDRAULIC PUMP
• The hydraulic pump is precision machined and assembled: if disassemble once, it may be unable to keep
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.
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(1) Removing Hydraulic Pump Assembly
Bonnet and Side Skirt RH
1. Open the bonnet (1).
2. Remove the side skirt RH (2).
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Regulating Valve (Manual Transmission and GST Models)
1. Disconnect the power steering delivery pipe (4) and return hose
(3).
2. Disconnect the GST/PTO delivery pipe (5) and regulator
delivery pipe (1).
3. Remove the regulating valve (2).
(When reassembling)
• Apply grease to the O-ring and be careful not to damage it.
• Install the copper washers firmly.
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(1) Bonnet (2) Side Skirt RH
Tightening torque
Power steering delivery
pipe joint bolt
40 to 49 N·m
4.0 to 5.0 kgf·m
29 to 36 lbf·ft
GST/PTO delivery pipe
joint bolt
35 to 39 N·m
3.5 to 4.0 kgf·m
26 to 28 lbf·ft
Regulator delivery pipe
joint bolt
40 to 49 N·m
4.0 to 5.0 kgf·m
29 to 36 lbf·ft
Regulating valve mounting
screw
18 to 20 N·m
1.8 to 2.1 kgf·m
13 to 15 lbf·ft
(1) Regulator Delivery Pipe
(2) Regulating Valve
(3) Return Hose
(4) Power Steering Delivery Pipe
(5) GST/PTO Delivery Pipe
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