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Cressi-sub MC5 Repair And Maintenance Instructions
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Cressi-sub MC5 Repair And Maintenance Instructions

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Regulators repair and maintenance
Regulators repair and maintenance
MC5 INT HZ 800098
MC5 INT HZ 800098
MC5 DIN 300 bar HZ 800099
MC5 DIN 300 bar HZ 800099
January
2008
January
2008
Rev. MC5 / 1
Rev. MC5 / 1
1st stage MC5
1st stage MC5
Ed. A / 08
Ed. A / 08
1
1

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Summary of Contents for Cressi-sub MC5

  • Page 1 1st stage MC5 Regulators repair and maintenance Regulators repair and maintenance MC5 INT HZ 800098 MC5 INT HZ 800098 MC5 DIN 300 bar HZ 800099 MC5 DIN 300 bar HZ 800099 January 2008 Rev. MC5 / 1 Ed. A / 08...
  • Page 2 • Should the information reported in this manual be unclear or not fully understandable, please contact Cressi-sub before carrying out any disassembling or maintenance operation. • Before carrying out any operation, Cressi-sub recommend to read this manual carefully in order to get to know thoroughly all necessary tools and techniques to carry out a correct maintenance and repair of the equipment.
  • Page 3 Regulators repair and maintenance WARNING ! WARNING ! • Before any operation, Cressi-sub recommend to read carefully the present document in order to get to know thoroughly all necessary tools and techniques to carry out a correct maintenance and repair of the equipment.
  • Page 4 STAGE (HZ 80068) ANNUAL REPLACEMENT KIT CHART (Real Size) MC5 DIN 1 STAGE (HZ 80053) ANNUAL REPLACEMENT KIT CHART (Real Size) January 2008 Rev. MC5 / 1 Ed. A / 08 January 2008 Rev. MC5 / 1 Ed. A / 08...

  • Page 5: Maintenance

    January 2008 Rev. MC5 / 1 Ed. A / 08 January 2008 Rev. MC5 / 1 Ed. A / 08...
  • Page 6 January 2008 Rev. MC5 / 1 Ed. A / 08 January 2008 Rev. MC5 / 1 Ed. A / 08...

  • Page 7: Yearly Maintenance

    • Yearly maintenance • Cressi-sub recommends a full maintenance of the regulator at least once a year or more in case of particularly intensive use. The maintenance must include the replacement of every OR, of the conical filter and relating clip, of the first stadium HP pad and of the seal.
  • Page 8 (21% oxygen, 79% nitrogen). • Use only original Cressi sub spare parts • Use only original Cressi sub spare parts January 2008 Rev. MC5 / 1 Ed. A / 08 January 2008 Rev. MC5 / 1 Ed. A / 08...
  • Page 9 January 2008 Rev. MC5 / 1 Ed. A / 08 January 2008 Rev. MC5 / 1 Ed. A / 08...
  • Page 10 January 2008 Rev. MC5 / 1 Ed. A / 08 January 2008 Rev. MC5 / 1 Ed. A / 08...
  • Page 11 Regulators repair and maintenance 2 = HZ 770080 4 = HZ 800089 • Remove the 1st stage bracket blocking nut and the bracket. January 2008 Rev. MC5 / 1 Ed. A / 08 January 2008 Rev. MC5 / 1 Ed. A / 08...
  • Page 12 6 = HZ 800056 10K = HZ 800058 • Remove the sintered filter and take out the 1 stage whole valve. January 2008 Rev. MC5 / 1 Ed. A / 08 January 2008 Rev. MC5 / 1 Ed. A / 08...
  • Page 13 11 = HZ 800059 • Remove the bracket blocking nut OR washer, then take the whole HP racket-piston bush out of its seat. January 2008 Rev. MC5 / 1 Ed. A / 08 January 2008 Rev. MC5 / 1 Ed. A / 08...
  • Page 14 1st stage disk with a hammer of synthetic material. January 2008 Rev. MC5 / 1 Ed. A / 08 January 2008 Rev. MC5 / 1 Ed. A / 08...
  • Page 15 22 = HZ 800063 disk using a 11,8 in. hexagonal spanner. January 2008 Rev. MC5 / 1 Ed. A / 08 January 2008 Rev. MC5 / 1 Ed. A / 08...
  • Page 16 • You can also remove the diaphragm out of its seat, by letting in low pressurized water through a 3/8“LP port. January 2008 Rev. MC5 / 1 Ed. A / 08 January 2008 Rev. MC5 / 1...
  • Page 17 Diaphragm blocking disk HZ 800062 / HZ 800061 HZ 800063 Bracket blocking nut Spring smoother Diaphragm HZ 800054 HZ 800064 HZ 800082 January 2008 Rev. MC5 / 1 Ed. A / 08 January 2008 Rev. MC5 / 1 Ed. A / 08...
  • Page 18 Piattello guida molla HZ 800081 HZ 800081 Diaphragm blocking disk Diaphragm DIN filter body HZ 800063 HZ 800082 Spring smoother HZ 800064 January 2008 Rev. MC5 / 1 Ed. A / 08 January 2008 Rev. MC5 / 1 Ed. A / 08...
  • Page 19 Regulators repair and maintenance • Use a tool to insert the anti- extrusion ring in the balancing chamber. 7K = HZ 800057 January 2008 Rev. MC5 / 1 Ed. A / 08 January 2008 Rev. MC5 / 1 Ed. A / 08...
  • Page 20 • Note: it is very important to grease the HP valve well, to make it work correctly. January 2008 Rev. MC5 / 1 Ed. A / 08 January 2008 Rev. MC5 / 1 Ed. A / 08...
  • Page 21 HP piston leg IS NOT blocked by any foreign 9 = HZ 800085 body. 7K = HZ 800057 January 2008 Rev. MC5 / 1 Ed. A / 08 January 2008 Rev. MC5 / 1 Ed. A / 08...
  • Page 22 • Insert the HP bracket piston bush in the 1st stage body, as shown in the picture. 11 = HZ 800059 January 2008 Rev. MC5 / 1 Ed. A / 08 January 2008 Rev. MC5 / 1 Ed. A / 08...
  • Page 23 • Insert the assembled HP valve in the 1st stage body, as shown in the picture. 10K = HZ 800058 January 2008 Rev. MC5 / 1 Ed. A / 08 January 2008 Rev. MC5 / 1 Ed. A / 08...
  • Page 24 Regulators repair and maintenance • Lay the sintered filter on the valve, as shown 6 = HZ 800056 in the picture. January 2008 Rev. MC5 / 1 Ed. A / 08 January 2008 Rev. MC5 / 1 Ed. A / 08...
  • Page 25 Click 1 for INT assembling phases assembling phases Click 2 for DIN Click 2 for DIN assembling assembling phases phases January 2008 Rev. MC5 / 1 Ed. A / 08 January 2008 Rev. MC5 / 1 Ed. A / 08...
  • Page 26 MC5: stage MC5: assembling phases INT assembling phases INT Regulators repair and maintenance Regulators repair and maintenance January 2008 Rev. MC5 / 1 Ed. A / 08 January 2008 Rev. MC5 / 1 Ed. A / 08...
  • Page 27 1 stage against the work-table, in order to be sure the OR is correctly placed in its own seat. January 2008 Rev. MC5 / 1 Ed. A / 08 January 2008 Rev. MC5 / 1 Ed. A / 08...
  • Page 28 Tightening the bracket blocking nut by means of a dynamometric spanner: 30 N x m Continues Continues on page 35 on page 35 January 2008 Rev. MC5 / 1 Ed. A / 08 January 2008 Rev. MC5 / 1 Ed. A / 08...
  • Page 29 DIN assembling phases DIN Regulators repair and maintenance Regulators repair and maintenance 25 K (Kit OR DIN) HZ 800066 January 2008 Rev. MC5 / 1 Ed. A / 08 January 2008 Rev. MC5 / 1 Ed. A / 08...
  • Page 30 • After greasing the DIN filter body’ s 5 (OR) = HZ 800055 OR, insert it in its seat. 26K = HZ 800067 January 2008 Rev. MC5 / 1 Ed. A / 08 January 2008 Rev. MC5 / 1 Ed. A / 08...
  • Page 31 1st stage against the work-table, in order to be sure the OR is correctly placed in its own seat. January 2008 Rev. MC5 / 1 Ed. A / 08 January 2008 Rev. MC5 / 1...
  • Page 32 DIN filter body with a dynamometric spanner, supplied with a 22 mm (8,66”) hexagonal insert. Apply a force of 30 N x m. January 2008 Rev. MC5 / 1 Ed. A / 08 January 2008 Rev. MC5 / 1 Ed. A / 08...
  • Page 33 Regulators repair and maintenance Regulators repair and maintenance • Place the DIN connection ring on 26K = HZ 800067 the DIN filter body. January 2008 Rev. MC5 / 1 Ed. A / 08 January 2008 Rev. MC5 / 1 Ed. A / 08...
  • Page 34 6mm (0,24”) hexagonal insert. Apply a force of 1.5 - 2 N x m. 26K = HZ 800067 January 2008 Rev. MC5 / 1 Ed. A / 08 January 2008 Rev. MC5 / 1 Ed. A / 08...
  • Page 35 DIN filter body (DIN model), turn the body and insert the pushing pin in its seat. 14 = HZ 800061 January 2008 Rev. MC5 / 1 Ed. A / 08 January 2008 Rev. MC5 / 1 Ed. A / 08...
  • Page 36 18 = HZ 800062 • Insert the pushing pin and press it slightly, in order to be sure the device works correctly. January 2008 Rev. MC5 / 1 Ed. A / 08 January 2008 Rev. MC5 / 1 Ed. A / 08...
  • Page 37 19 = HZ 800082 January 2008 Rev. MC5 / 1 Ed. A / 08 January 2008 Rev. MC5 / 1 Ed. A / 08...
  • Page 38 • Screw the diaphragm blocking disk down, tightening it with a dynamometric spanner, supplied with a 30mm (11,8”) hexagonal insert. Apply a force of 30 N x m. January 2008 Rev. MC5 / 1 Ed. A / 08 January 2008 Rev. MC5 / 1...
  • Page 39 1 stage as shown in the picture. 20 = HZ 800081 21 = HZ 800080 January 2008 Rev. MC5 / 1 Ed. A / 08 January 2008 Rev. MC5 / 1 Ed. A / 08...
  • Page 40 Regulators repair and maintenance Regulators repair and maintenance • Insert the spring smoother in the 1 stage setting screw. 23 = HZ 800064 January 2008 Rev. MC5 / 1 Ed. A / 08 January 2008 Rev. MC5 / 1 Ed. A / 08...
  • Page 41 - not too tightly - into the threaded seat of the diaphragm blocking disk, before setting the 1 stage correctly. January 2008 Rev. MC5 / 1 Ed. A / 08 January 2008 Rev. MC5 / 1 Ed. A / 08...
  • Page 42 Riparazione Manutenzione Manutenzione Erogatori Erogatori • MC5 1 stage setting procedure, as shown in the picture on page 44: • Assemble the setting pressure-gauge on one of the LP ports of the 1st stage • Assemble the whole regulator (including 1st and 2nd stages) on a 200 bar pressurized tank, or on an equally pressurized test-bed.
  • Page 43 Regulators repair and maintenance • Check the pressure shown by the gauge. MC5 1st stage is correctly set when the intermediate pressure is 10 bar. Should it be different, close the air tap and discharge the regulator. Insert a 0,24 in. Allen wrench in the setting screw and screw clockwise (+)in order to increase the 1st stage intermediate pressure.
  • Page 44 MC5 1 stage setting setting Regulators repair and maintenance Regulators repair and maintenance ∆ < 1 ∆ < 1 January 2008 Rev. MC5 / 1 Ed. A / 08 January 2008 Rev. MC5 / 1 Ed. A / 08...
  • Page 45 MC5: stage MC5: Tools Regulators repair and maintenance Regulators repair and maintenance MC5 1st stage tools MC5 1st stage tools January 2008 Rev. MC5 / 1 Ed. A / 08 January 2008 Rev. MC5 / 1 Ed. A / 08...
  • Page 46 MC5: Tools Regulators repair and maintenance Regulators repair and maintenance • Bracket-lock spanner and compass • Cod. HZ 709012 January 2008 Rev. MC5 / 1 Ed. A / 08 January 2008 Rev. MC5 / 1 Ed. A / 08...
  • Page 47 Tools Regulators repair and maintenance Regulators repair and maintenance • Threaded bar for regulator’s vice closing • Cod. HZ 709008 January 2008 Rev. MC5 / 1 Ed. A / 08 January 2008 Rev. MC5 / 1 Ed. A / 08...
  • Page 48 MC5: Tools Regulators repair and maintenance Regulators repair and maintenance • 0,23” (6 mm) hexagonal spanner • Cod. HZ 709006 January 2008 Rev. MC5 / 1 Ed. A / 08 January 2008 Rev. MC5 / 1 Ed. A / 08...
  • Page 49 MC5: stage MC5: Tools Regulators repair and maintenance Regulators repair and maintenance • O-ring removal tool • Cod.HZ 709004 January 2008 Rev. MC5 / 1 Ed. A / 08 January 2008 Rev. MC5 / 1 Ed. A / 08...
  • Page 50 Regulators repair and maintenance Regulators repair and maintenance • Torque wrench (Not available) January 2008 Rev. MC5 / 1 Ed. A / 08 January 2008 Rev. MC5 / 1 Ed. A / 08...

This manual is also suitable for:

Hz 800098Hz 800099