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MAINTENANCE MANUAL

G25

Doc. No. NDP 540M-03

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Summary of Contents for G25

Page 1: ...MAINTENANCE MANUAL G25 Doc No NDP 540M 03 ...

Page 2: ...ore the caution described and operate the product in an improper manner there is danger of personal injury or property damage Furthermore to indicate the type of danger and damage the following symbols are also used along with those mentioned above This symbol indicates a DON T and will be accompanied by an explanation on something you must not do This symbol indicates a DO and will be accompanied...

Page 3: ... 1 2 4 Misc 1 3 Ordering Replacement parts 1 4 Balls Valve seats 4 1 Removal 2 4 2 Inspection 3 4 3 Installation 3 5 Diaphragm and Center rod 5 1 Removal 4 5 2 Inspection 4 5 3 Installation 5 6 Guide bush 6 1 Removal 6 6 2 Inspection 6 6 3 Installation 6 7 Spool valve assembly and Sleeve 7 1 Removal 7 7 2 Inspection 8 7 3 Installation 8 8 Retightening of Tie rods 8 ...

Page 4: ...ntenance is recommended after each of the following periods Estimated inspection timing Based on water at room temperature Type of diaphragm Operation hours h NBR 500 PTFE 150 TPEE 750 TPO 750 In critical operations where preventive measures need to be taken it is recommended to inspect diaphragms after every three months of operation 2 2 General tools Socket wrenches 10mm 17mm Open end wrenches 1...

Page 5: ... and remove the manifold Fig 4 1 Remove the O ring ball valve seat Fig 4 2 Turn over the main body assembly Fig 4 3 Remove 4 mounting bolts from lower manifold and remove the base and the manifold Fig 4 3 Remove the O ring valve seat ball Fig 4 4 Fig 4 1 Fig 4 2 Fig 4 3 Fig 4 4 ...

Page 6: ...seat Usable range of Valve seat 4 mm or less O ring other than PTFE If O ring is worn out or cracked replace it 4 3 Installation For installation see Exploded View on the separate sheet and install in the reverse order of disassembly Tightening torque for manifold retainer bolts or nuts AN AH AS 10 N m AT 20 N m NOTE Make sure there is no dust on the seal surface and the seal is not damaged Replac...

Page 7: ...diaphragm Fig 5 2 Remove the center disk and center rod from the opposite side of the main body Remove the center disk on the opposite side using the double nuts Fig 5 3 Remove the center disk and diaphragm 5 2 Inspection Diaphragm If the diaphragm is worn out or damaged replace it Never replace just one diaphragm Center rod Fig 5 4 Measure the diameter and if it is outside the usable range replac...

Page 8: ...Fig 5 5 5 6 5 7 condition Bolts should not be fully tightened at this point Pull out the diaphragms to the other side and assemble the out chamber with Fig 5 5 5 6 5 7 condition Bolts should not be fully tightened at this point Place the pump on flat surface stand the pump upright and tighten all the bolts fully NOTE Make sure there is no dust on the seal surface in order to prevent seal damaged R...

Page 9: ... Usable range of guide bush Guide bush A C φ18 4 φ18 7 mm Guide bush B φ18 3 φ18 6 mm O ring If the O ring is worn out or cracked replace it 6 3 Installation For installation see Exploded View on the separate sheet and install in the reverse order of disassembly Tightening torque for air chamber retainer bolts 18 N m NOTE Make sure there is no dust on the seal surface and the seal is not damaged A...

Page 10: ...body assembly from the main body Fig 7 1 Remove the cap A using the cap remover special tool Part No 717114 Fig 7 2 Remove the cushion and then push out the Spool valve assembly from opposite side Fig 7 3 Remove the sleeve using the sleeve remover special tool Part number 713148 Fig 7 4 Fig 7 1 Fig 7 2 Fig 7 3 Fig 7 4 ...

Page 11: ...mplete set Unable to replace individual component 7 3 Installation For installation see Exploded View on the separate sheet and install in the reverse order of disassembly Tightening torque for Valve body assembly attaching 5 N m NOTE Make sure there is no dust on the seal surface and it is not damaged Fill the packing mounting part of the spool with grease and reinstall the packing 8 Retightening...

Page 12: ... FAX 31 0 74 242 1055 E mail sales yamada nl Web www yamada europe com Manufactured by YAMADA CORPORATION INTERNATIONAL DEPARTMENT 1 1 3 Minami Magome Ota ku Tokyo 143 8504 Japan PHONE 81 0 3 3777 0241 FAX 81 0 3 3777 0584 E mail intl yamadacorp co jp Web www yamadacorp co jp 202104 2549 NDP540M ...

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