U20-3, U25-3 WSM
Hydraulic system (Mechanism section)
IV
-M-4
C.Main pump
a. Structure & specifications
No.
PARTS NAME
Q’ty
No.
PARTS NAME
Q’ty
No.
PARTS NAME
Q’ty
No.
PARTS NAME
Q’ty
Body S
1
21
Rod G
1
41
None
61
Hex nut
1
2
Body H
1
22
None
42
Plug
1
62
Sealing washer
1
3
Shaft
1
23
None
43
O-ring
1
63
None
4
Cylinder barrel
1
24
Retainer
2
44
Hex socket bolt
5
64
None
5
Valve plate
1
25
Stopper pin A
1
45
None
65
Gear pump
1
6
Piston
10
26
Stopper pin B
1
46
None
66
Coupling
1
7
Shoe
10
27
Socket pin
1
47
None
67
Collar
1
8
Shoe holder
1
28
None
48
None
68
Hex bolt
2
9
Barrel holder
1
29
None
49
Hex socket plug
5
69
O-ring
1
10
Swash plate
1
30
Ball bearing
1
50
None
70
Washer
2
11
Needle
3
31
Needle bearing
1
51
Plug
1
71
O-ring
1
12
Oscillating pin
2
32
Oil seal
1
52
None
72
O-ring
1
13
Packing
1
33
Plate spring
4
53
None
14
Spring C
1
34
Snap ring
1
54
None
15
Spring T1
1
35
Snap ring
1
55
None
16
None
36
Snap ring
1
56
Spring pin
1
17
None
37
None
57
None
18
Spring holder
1
38
None
58
None
19
Spring guide
1
39
O-ring
1
59
None
20
Pin
1
40
O-ring
2
60
Hex socket lock screw
1
Machine model
U20-3
U25-3
Engine RPM
2200
2400
Manufacturer
Fujikoshi
Fujikoshi
Type
PVD-OB-24P-6G3-4694A
PVD-OB-24P-8G3-4837B
Variable displacement pump + Gear pump
Variable displacement pump + Gear pump
Discharge
Capacity
P
1
, P
2
23.0 L / min
6.1 GPM
28.8 L / min
7.6 GPM
P
3
12.8 L / min
3.4 GPM
19.2 L / min
5.1 GPM
P
P
5.9 L / min
1.6 GPM
6.5 L / min
1.7 GPM
Summary of Contents for U20-3
Page 1: ...WORKSHOP MANUAL KUBOTA EXCAVATOR U20 3 Code No 97899 60740 U25 3 ...
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Page 48: ...U20 3 U25 3 WSM Machine body Mechanism section II M 17 U25 3 No 1 Hole 2 shaft ...
Page 50: ......
Page 62: ...U20 3 U25 3 WSM Machine body Service section II S 13 B Front attachment a Parts designation ...
Page 116: ......
Page 118: ...U20 3 U25 3 WSM Engine III 3 ...
Page 121: ...U20 3 U25 3 WSM Engine III 6 Performance curves Model D1105 EBH 10 ...
Page 122: ...U20 3 U25 3 WSM Engine III 7 Performance curves Model D1105 EBH 11 ...
Page 123: ...U20 3 U25 3 WSM Engine III 8 b Dimensions ...
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Page 127: ...U20 3 U25 3 WSM Engine Mechanism section III M 2 A Feature ...
Page 129: ...U20 3 U25 3 WSM Engine Mechanism section III M 4 3 Crankshaft 4 Piston and piston rings ...
Page 130: ...U20 3 U25 3 WSM Engine Mechanism section III M 5 5 Connecting rod 6 Rocker arm 7 Camshaft ...
Page 131: ...U20 3 U25 3 WSM Engine Mechanism section III M 6 8 Fuel camshaft 9 Flywheel ...
Page 132: ...U20 3 U25 3 WSM Engine Mechanism section III M 7 C Lubricating system 1 General ...
Page 133: ...U20 3 U25 3 WSM Engine Mechanism section III M 8 2 Oil pump 3 Relief valve ...
Page 134: ...U20 3 U25 3 WSM Engine Mechanism section III M 9 4 Oil filter cartridge 5 Oil pressure switch ...
Page 135: ...U20 3 U25 3 WSM Engine Mechanism section III M 10 D Cooling system 1 General 2 Water pump ...
Page 137: ...U20 3 U25 3 WSM Engine Mechanism section III M 12 5 Radiator cap ...
Page 139: ...U20 3 U25 3 WSM Engine Mechanism section III M 14 F Fuel system 1 General 2 Injection pump ...
Page 140: ...U20 3 U25 3 WSM Engine Mechanism section III M 15 ...
Page 141: ...U20 3 U25 3 WSM Engine Mechanism section III M 16 ...
Page 143: ...U20 3 U25 3 WSM Engine Mechanism section III M 18 5 Governor ...
Page 144: ...U20 3 U25 3 WSM Engine Mechanism section III M 19 ...
Page 146: ...U20 3 U25 3 WSM Engine Mechanism section III M 21 ...
Page 147: ...U20 3 U25 3 WSM Engine Mechanism section III M 22 G Electrical system 1 Charging system ...
Page 148: ...U20 3 U25 3 WSM Engine Mechanism section III M 23 H Turbo charger system ...
Page 149: ...U20 3 U25 3 WSM Engine Mechanism section III M 24 ...
Page 150: ...U20 3 U25 3 WSM Engine Mechanism section III M 25 ...
Page 151: ...U20 3 U25 3 WSM Engine Mechanism section III M 26 ...
Page 152: ...U20 3 U25 3 WSM Engine Mechanism section III M 27 ...
Page 162: ...U20 3 U25 3 WSM Engine Service section III S 10 B General 1 Engine identification ...
Page 163: ...U20 3 U25 3 WSM Engine Service section III S 11 2 General precaution ...
Page 164: ...U20 3 U25 3 WSM Engine Service section III S 12 3 Tightening torques ...
Page 165: ...U20 3 U25 3 WSM Engine Service section III S 13 4 Troubleshooting ...
Page 166: ...U20 3 U25 3 WSM Engine Service section III S 14 ...
Page 167: ...U20 3 U25 3 WSM Engine Service section III S 15 ...
Page 168: ...U20 3 U25 3 WSM Engine Service section III S 16 5 Servicing specifications ...
Page 169: ...U20 3 U25 3 WSM Engine Service section III S 17 ...
Page 170: ...U20 3 U25 3 WSM Engine Service section III S 18 ...
Page 171: ...U20 3 U25 3 WSM Engine Service section III S 19 ...
Page 172: ...U20 3 U25 3 WSM Engine Service section III S 20 ...
Page 173: ...U20 3 U25 3 WSM Engine Service section III S 21 ...
Page 174: ...U20 3 U25 3 WSM Engine Service section III S 22 ...
Page 175: ...U20 3 U25 3 WSM Engine Service section III S 23 ...
Page 176: ...U20 3 U25 3 WSM Engine Service section III S 24 ...
Page 177: ...U20 3 U25 3 WSM Engine Service section III S 25 6 Maintenance check list ...
Page 178: ...U20 3 U25 3 WSM Engine Service section III S 26 7 Check and maintenance ...
Page 179: ...U20 3 U25 3 WSM Engine Service section III S 27 ...
Page 180: ...U20 3 U25 3 WSM Engine Service section III S 28 ...
Page 181: ...U20 3 U25 3 WSM Engine Service section III S 29 ...
Page 182: ...U20 3 U25 3 WSM Engine Service section III S 30 ...
Page 183: ...U20 3 U25 3 WSM Engine Service section III S 31 ...
Page 184: ...U20 3 U25 3 WSM Engine Service section III S 32 ...
Page 185: ...U20 3 U25 3 WSM Engine Service section III S 33 ...
Page 186: ...U20 3 U25 3 WSM Engine Service section III S 34 ...
Page 187: ...U20 3 U25 3 WSM Engine Service section III S 35 ...
Page 188: ...U20 3 U25 3 WSM Engine Service section III S 36 ...
Page 189: ...U20 3 U25 3 WSM Engine Service section III S 37 ...
Page 190: ...U20 3 U25 3 WSM Engine Service section III S 38 ...
Page 191: ...U20 3 U25 3 WSM Engine Service section III S 39 C Engine body CHECKING AND ADJUSTING ...
Page 192: ...U20 3 U25 3 WSM Engine Service section III S 40 DISASSEMBLING AND ASSEMBLING ...
Page 194: ...U20 3 U25 3 WSM Engine Service section III S 42 3 Cylinder head and valves ...
Page 195: ...U20 3 U25 3 WSM Engine Service section III S 43 ...
Page 196: ...U20 3 U25 3 WSM Engine Service section III S 44 4 Gear case ...
Page 197: ...U20 3 U25 3 WSM Engine Service section III S 45 ...
Page 198: ...U20 3 U25 3 WSM Engine Service section III S 46 ...
Page 199: ...U20 3 U25 3 WSM Engine Service section III S 47 ...
Page 200: ...U20 3 U25 3 WSM Engine Service section III S 48 ...
Page 201: ...U20 3 U25 3 WSM Engine Service section III S 49 ...
Page 202: ...U20 3 U25 3 WSM Engine Service section III S 50 5 Piston and connecting rod ...
Page 203: ...U20 3 U25 3 WSM Engine Service section III S 51 ...
Page 204: ...U20 3 U25 3 WSM Engine Service section III S 52 ...
Page 205: ...U20 3 U25 3 WSM Engine Service section III S 53 6 Flywheel and crankshaft ...
Page 206: ...U20 3 U25 3 WSM Engine Service section III S 54 ...
Page 207: ...U20 3 U25 3 WSM Engine Service section III S 55 SERVICING 1 Cylinder head ...
Page 208: ...U20 3 U25 3 WSM Engine Service section III S 56 ...
Page 209: ...U20 3 U25 3 WSM Engine Service section III S 57 ...
Page 210: ...U20 3 U25 3 WSM Engine Service section III S 58 ...
Page 211: ...U20 3 U25 3 WSM Engine Service section III S 59 ...
Page 212: ...U20 3 U25 3 WSM Engine Service section III S 60 2 Timing gear and camshaft ...
Page 213: ...U20 3 U25 3 WSM Engine Service section III S 61 ...
Page 214: ...U20 3 U25 3 WSM Engine Service section III S 62 3 Piston and connecting rod ...
Page 215: ...U20 3 U25 3 WSM Engine Service section III S 63 ...
Page 216: ...U20 3 U25 3 WSM Engine Service section III S 64 ...
Page 217: ...U20 3 U25 3 WSM Engine Service section III S 65 4 Crankshaft ...
Page 218: ...U20 3 U25 3 WSM Engine Service section III S 66 ...
Page 219: ...U20 3 U25 3 WSM Engine Service section III S 67 ...
Page 220: ...U20 3 U25 3 WSM Engine Service section III S 68 ...
Page 221: ...U20 3 U25 3 WSM Engine Service section III S 69 ...
Page 222: ...U20 3 U25 3 WSM Engine Service section III S 70 ...
Page 223: ...U20 3 U25 3 WSM Engine Service section III S 71 5 Cylinder ...
Page 224: ...U20 3 U25 3 WSM Engine Service section III S 72 ...
Page 226: ...U20 3 U25 3 WSM Engine Service section III S 74 ...
Page 228: ...U20 3 U25 3 WSM Engine Service section III S 76 DISASSEMBLING AND ASSEMBLING ...
Page 229: ...U20 3 U25 3 WSM Engine Service section III S 77 ...
Page 231: ...U20 3 U25 3 WSM Engine Service section III S 79 ...
Page 232: ...U20 3 U25 3 WSM Engine Service section III S 80 2 Injection nozzle ...
Page 233: ...U20 3 U25 3 WSM Engine Service section III S 81 DISASSEMBLING AND ASSEMBLING 1 Injection pump ...
Page 234: ...U20 3 U25 3 WSM Engine Service section III S 82 2 Injection nozzle ...
Page 235: ...U20 3 U25 3 WSM Engine Service section III S 83 G Electrical system CHECKING 1 Starter ...
Page 237: ...U20 3 U25 3 WSM Engine Service section III S 85 2 Alternator ...
Page 238: ...U20 3 U25 3 WSM Engine Service section III S 86 ...
Page 239: ...U20 3 U25 3 WSM Engine Service section III S 87 ...
Page 240: ...U20 3 U25 3 WSM Engine Service section III S 88 SERVICING 1 Starter ...
Page 241: ...U20 3 U25 3 WSM Engine Service section III S 89 ...
Page 242: ...U20 3 U25 3 WSM Engine Service section III S 90 2 Alternator ...
Page 243: ...U20 3 U25 3 WSM Engine Service section III S 91 ...
Page 244: ...U20 3 U25 3 WSM Engine Service section III S 92 ...
Page 245: ...U20 3 U25 3 WSM Engine Service section III S 93 H Turbo charger system CHECKING ...
Page 246: ...U20 3 U25 3 WSM Engine Service section III S 94 ...
Page 247: ...U20 3 U25 3 WSM Engine Service section III S 95 DISASSEMBLING AND ASSEMBLING ...
Page 248: ...U20 3 U25 3 WSM Engine Service section III S 96 ...
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Page 279: ...U20 3 U25 3 WSM Hydraulic system Mechanism section IV M 28 ...
Page 280: ...U20 3 U25 3 WSM Hydraulic system Mechanism section IV M 29 b Pilot valve control diagram ...
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Page 312: ...U20 3 U25 3 WSM Hydraulic system Mechanism section IV M 60 b U20 3 Retractable undercarriage ...
Page 313: ...U20 3 U25 3 WSM Hydraulic system Mechanism section IV M 61 c U25 3 ...
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Page 330: ...U20 3 U25 3 WSM Hydraulic system Service section IV S 15 1 Travel mechanism check points ...
Page 397: ...U20 3 U25 3 WSM Hydraulic system Service section IV S 82 ...
Page 415: ...U20 3 U25 3 WSM Hydraulic system Service section IV S 100 3 Component parts of wheel motor ...
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Page 480: ...U20 3 U25 3 WSM Electrical system Service section V S 3 a Front ...
Page 482: ...U20 3 U25 3 WSM Electrical system Service section V S 5 c Swivel frame ...
Page 483: ...U20 3 U25 3 WSM Electrical system Service section V S 6 Around battery ...
Page 486: ...U20 3 U25 3 WSM Electrical system Service section V S 9 3 Around selector valve ...
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