Hydraulics - Seafish

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<strong>Hydraulics</strong> in Fishing Vessels This OPEN LEARNING Module has been prepared for the Seaf ish Open Tech Project working in collaboration with the British Fisheries colleges, with assistance from the Manpower Services Commission.
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SEA FISH INDUSTRY AUTHORITY Hydraul
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Hydraulics in Fishing Vessels An Op
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SEGMENT FIVE - HYDRAULIC OILS AND F
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A Guide for Open Learners This will
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VII S.A.Q/S are shown by a box with
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IX • Time spent just reading a mo
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XIII Objectives After completing th
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Working cylinder V 7 3 •< ► Loa
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Write down a list of the main compo
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In this type the rotor shaft is off
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8 Pressure Control Valves Positive
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10 Relief valves are either pre-set
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12 (A) From Pump (P) i a(B) Raise H
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14 Out Out Globe valve Figure 17. S
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16 (?) SAQ25 Explain how a relief v
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18 The cylinders shown in Figures 2
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20 Figure. 31. Figure 32. Port A Po
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22 Which types of pumps can be used
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24 Hydraulic Pressure The pressure
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26 In order to help you to compare
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28 ® SAQ18 Using Figure 35 on page
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30 ® SAQ29 When a hydraulic motor
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32 Rotor Inlet External Gear Pump F
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34 The vanes are pushed out by cent
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36 Piston Pumps All piston pumps de
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38 Drive shaft flange Piston Yoke c
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40 Eccentric Oil outlet Figure 49.
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43 Segment Four — Hydraulic Syste
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45 K4SS^^ LINES AND LINE FUNCTIONS
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47 PUMP ONE-WAY VARIABLE OUTPUT PUM
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49 • Pilot pressure means that oi
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51 ® A reversible motor with a bra
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53 (?) SAQ15 Using the information
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55 First, identify each of the item
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57 ® SAQ28 Using the diagram of Fi
Page 79: 59 SUMMARY You have now completed S
Page 83 and 84: 62 PROPERTIES OF HYDRAULIC OILS The
Page 85 and 86: 64 (2) SAQ20 How is the viscosity o
Page 87 and 88: 66 (?) SAQ26 Using Table 3 determin
Page 89 and 90: 68 Additives in Hydraulic Oils Many
Page 91 and 92: 70 CONTAMINATION Dirt and other for
Page 93 and 94: 72 • Metal wear particles • Pac
Page 95 and 96: 74 Full flow filters are all fitted
Page 99 and 100: 77 Segment Six — Maintenance and
Page 101 and 102: 79 Cleanliness has top priority.
Page 103 and 104: 81 Do not 'grip' a hot pipe. Try a
Page 105 and 106: 83 Faulty Seals Faulty Seals on pum
Page 107 and 108: 85 Excessive Noise Table 4 Seafish
Page 109 and 110: 87 Incorrect Flow Table 6 Seafish O
Page 111 and 112: 89 Faulty Operation Table 8 Seafish
Page 113 and 114: 93 So you can see that there are ma
Page 117 and 118: 95 Responses to the Self Assessment
Page 119 and 120: 97 SAQ 6 Did you show the change in
Page 121 and 122: 99 SAQ9 The various properties whic
Page 123 and 124: 101 SAQ15 SAQ16 A linear actuator p
Page 125 and 126: 103 SAQ20 (a) Viscosity increases a
Page 127 and 128: 105 SAQ26 SAE 20W/30 oil will have
Page 129: Other modules in this series which
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Hydraulics - Seafish

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