Cressi MC9 1st STAGE Setup guide

MC9 1st STAGE
Jannuary 2009 - Rev. MC9 /B
Ed. C/13
1st STAGE MC9
Service and Repair Operative Manual
MC9 1st Stage
137

MC9 1st STAGE
Service and Repair Operative Manual
JANNUARY 2009 - REV. MC9 /B - ED. C/13
138
This manual is restricted to Authorized Centers Cressi sub. Repair, maintenance, overhaul, calibration and any other intervention made to the dispensers must be made exclusively by trained
personnel of the Authorized Centers Cressi sub. Cressi sub accepts no responsibility for actions on the dispensers carried out by an authorized and specifically trained by the same Cressi sub.
WARNING!
• This manual is intended for use by expert technicians who should attend or have already received training
in equipment repairs and maintenance from Cressi-sub.
• Avoid performing maintenance and/or repair operations on the equipment without the proper training required
to conduct these operations.
• Users must never perform maintenance themselves; all maintenance must be performed EXCLUSIVELY
by an authorized Cressi-Sub center.
• If the information provided in this document is unclear or not fully intelligible, please contact Cressi-sub before
proceeding with any disassembly or maintenance procedures.
• Before proceeding, Cressi-sub recommends that you read the following document carefully to familiarize yourself
with all the tools and techniques needed to perform proper equipment maintenance and/or repair.
• Use this document as a guide during the various steps of maintaining and/or repairing the equipment.
• All operations must be done strictly in the order provided in this document.
Failure to do so could cause the equipment to function poorly, or worse, result in an accident.

MC9 1st STAGE
MC9 1st Stage
Service and Repair Operative Manual
JANNUARY 2009 - REV. MC9 /B - ED. C/13
139
This manual is restricted to Authorized Centers Cressi sub. Repair, maintenance, overhaul, calibration and any other intervention made to the dispensers must be made exclusively by trained
personnel of the Authorized Centers Cressi sub. Cressi sub accepts no responsibility for actions on the dispensers carried out by an authorized and specifically trained by the same Cressi sub.
WARNING!
• To prevent any assembly errors when performing maintenance and/or repairs, we recommend using all
the replacement parts provided by Cressi-Sub in every operation.
• Pay special attention to the recommendations provided in the margin of the figures that show the various
sequences of equipment maintenance and/or repair in order to avoid any problems that could result in an accident.
• The document below in no way replaces the equipment’s instruction manual.
• According to the European Standard, the procedures described in this document are pertinent to and intended
only for the disassembly, maintenance, and assembly of equipment meant for use with air (21% oxygen, 79%
nitrogen - EEC Countries Only).
• Further information about of lubrication and cleaning of components are shown within the professional area on
www.cressi.com site.
• The instructions provided in this document are based on information referring to the most update equipment
available before printing. This document was created on the knowledge of the state of the art of the equipment
during creation of this documentation. Cressi Sub reserves the right to make changes at any time.

Pos Cod Pos Cod
1 HZ730027 17 HZ800041
MC9
MC9 SC
MC5
1st Stages
(HZ 800047)
Annual
Replacement
Kit
2 HZ770080 18 HZ800062*
3k HZ800090 19 HZ800082*
4 HZ800054 20 HZ800081
5 HZ800055*21 HZ800080
6 HZ800056*22 HZ800063
7k HZ800057*23 HZ800064
8 HZ800086 24 HZ800065
9 HZ800085*25k HZ800066*
10k HZ800058 26k HZ800067
11 HZ800059*27k HZ800047*
12 HZ730106 28 HZ800042
13 HZ730108*29 HZ800043*
14 HZ730127 30 HZ800049
15 HZ730132*31 HZ800046
16k HZ800040
HZXXXXXX* Contenuto nel kit revisione e non disponibile
singolarmente. / Only available in maintenance kit; not available
individually./ HZXXXXXX non disponibile not available.
Ed/Issue 01/09
N°Tav./Rev. MC9/B
MC9 1st STAGE
Service and Repair Operative Manual
JANNUARY 2009 - REV. MC9 /B - ED. C/13
140
This manual is restricted to Authorized Centers Cressi sub. Repair, maintenance, overhaul, calibration and any other intervention made to the dispensers must be made exclusively by trained
personnel of the Authorized Centers Cressi sub. Cressi sub accepts no responsibility for actions on the dispensers carried out by an authorized and specifically trained by the same Cressi sub.
Spare parts

 
      
MC9 - MC9 S.C. - MC5 1st STAGES (HZ 800047) ANNUAL REPLACEMENT KIT CHART
1 Diaphragm
HZ 800082
1 Back-Up Ring
HZ 800057
1 Sintered Filter
HZ 800056
1 HP Valve
HZ 800085
1 HP Valve Jacket
HZ 800059
1 Pin Support
HZ 800062
HZ 730132
HZ 800055
HZ 800066 HZ 800066 HZ 800057
HZ 800043
HZ 730108
O-RING Reference Table
SPARE PARTS - Reference Table
1 External Hydrostatic Diaphragm
(MC9 S.C. Only) HZ 800011
      
      
      
T10 / T10 S.C./ CROMO 1 st STAGE (HZ 800045) ANNUAL REPLACEMENT KIT CHART
O-RING Reference Table
1 Diaphragm
HZ800082
1 Back-up Ring
HZ800081
1 Sintered Filter
HZ830091
1 HP poppet valve
HZ800085
1 External Hydrostatic
Diaphragm (T10 S.C. Only)
HZ800011
HZ830082 HZ830081HZ830094 HZ830094HZ800043 HZ730132 HZ730108
SPARE PARTS Reference Table
MC9 1st STAGE
MC9 1st Stage
Service and Repair Operative Manual
JANNUARY 2009 - REV. MC9 /B - ED. C/13
141
This manual is restricted to Authorized Centers Cressi sub. Repair, maintenance, overhaul, calibration and any other intervention made to the dispensers must be made exclusively by trained
personnel of the Authorized Centers Cressi sub. Cressi sub accepts no responsibility for actions on the dispensers carried out by an authorized and specifically trained by the same Cressi sub.
MC9 / MC9 S.C. / MC5 - Code N° HZ 800047 Annual Replacement Kit Chart
Use only original
Cressi-sub spare parts
Note: Cressi-sub recommend a full maintenance of the regulator
at least once a year or more in case of intensive use.
REAL SIZE

MC9 1st STAGE
Service and Repair Operative Manual
JANNUARY 2009 - REV. MC9 /B - ED. C/13
142
This manual is restricted to Authorized Centers Cressi sub. Repair, maintenance, overhaul, calibration and any other intervention made to the dispensers must be made exclusively by trained
personnel of the Authorized Centers Cressi sub. Cressi sub accepts no responsibility for actions on the dispensers carried out by an authorized and specifically trained by the same Cressi sub.
• Cressi-Sub recommends complete regulator maintenance at least once a year, or more frequently in the case of
particularly intense use.
• Maintenance must include replacement of all components provided in the annual equipment maintenance kit.
• The special tools for maintenance of this device are illustrated on one of next pages.
• Metal parts must be washed with hot water and neutral detergent and rinsed in fresh water. Any concretions
must be removed using ultrasound cleaning or with diluted acid solutions, always followed by long and thorough
rinsing under running water. For more information, please refer to the general procedure.
• Do not use acids or solvents on rubber components.
• The new ORs must be greased with a thin layer of lubricant: this procedure reduces to a minimum the risk of
damage during assembly.
• The metal threading can be lubricated with grease on the first two rings of threading.
Annual replacement
Annual replacement

MC9 1st STAGE
MC9 1st Stage
Service and Repair Operative Manual
JANNUARY 2009 - REV. MC9 /B - ED. C/13
143
This manual is restricted to Authorized Centers Cressi sub. Repair, maintenance, overhaul, calibration and any other intervention made to the dispensers must be made exclusively by trained
personnel of the Authorized Centers Cressi sub. Cressi sub accepts no responsibility for actions on the dispensers carried out by an authorized and specifically trained by the same Cressi sub.
• According to the European Standard, the procedures described in this document are pertinent to and intended
only for the disassembly, maintenance, and assembly of equipment meant for use with air (21% oxygen, 79%
nitrogen - EEC Countries Only).
• Users must never perform maintenance themselves; all maintenance must be performed EXCLUSIVELY by an
authorized Cressi-Sub center.
• You can find your authorized Cressi-Sub center by asking your dealer, or Cressi Sub S.p.A. itself by sending an
e-mail to:
[e-mail]
Annual replacement
Use only original
Cressi-sub spare parts
Annual replacement

70
Spare Parts Price List - Listino Pezzi Ricambio - Ersatzteilpreisliste - Pieces Detachees
SPECIFIC MC9 - MC9 S.C.
1ST STAGE REGULATORS TOOLS
Price -
€
1ST STAGE SETTING PRESSURE GAUGE
MANOMETRO TARATURA 1° STADIO MANOMETER JUSTIERUNG 1. STUFE MANOMÈTRE DE RÉGLAGE DU 1ER ÉTAGE
49,00 49,00 49,00 49,00
HZ710010
Price -
€
THREADED BAR TO TIGHTEN THE REGULATOR IN THE VICE
BARRA FILETTATA FISSAGGIO EROGATORE IN MORSA GEWINDESTAB ZUR BEFESTIGUNG DES ATEMREGLERS IM SCHRAUBSTOCK
ÉTAU À MAIN POUR MAINTIEN DU DÉTENDEUR DANS UN ÉTAU
9,00 9,00 9,00 9,00
HZ709008
Price -
€
YOKE NUT SOCKET AND WRENCH CHIAVE A BUSSOLA PER RIMOZIONE BLOCCASTAFFA SOCKET WRENCH TO REMOVE BRACKET NUT CLÉ À DOUILLE POUR DÉVISSAGE DE L’ÉCROU DE BLOCAGE D’ÉTRIER
56,00 56,00 56,00 56,00
HZ709012
Price -
€
REMOVING YOKE TOOL UTENSILE UNIVERSALE SMONTAGGIO STAFFA STECKSCHLÜSSEL ZUR ENTFERNUNG DER BEFESTIGUNGSMUTTER DES BÜGELS OUTIL UNIVERSEL DE DÉMONTAGE D’ÉTRIER CRESSI SUB
15,00 15,00 15,00 15,00
HZ709018
Price -
€
ALLEN KEY 6 mm CHIAVE ESAGONALE 6 mm SECHSKANTSCHLÜSSEL 6 mm CLÉ SIX PANS DE 6 mm
2,00 2,00 2,00 2,00
HZ709006
Price -
€
EXTRACTION POINT TOOL PUNTA DA ESTRAZIONE O-RING ENTFERNER POINTE D’EXTRACTION
4,50 4,50 4,50 4,50
HZ709004
Price -
€
TOOL TO REMOVE THE NOZZLE UTENSILE RIMOZIONE UGELLO WERKZEUG FÜR DIE ENTFERNUNG DER DÜSE OUTIL POUR L’EXTRACTION DU SIÈGE
4,00 4,00 4,00 4,00
HZ709016
Price -
€
BIG COMPASS MC9 S.C. SPANNER CHIAVE A COMPASSO GRANDE - MC9 S.C. VERSTELLBARER STIRNLOCHSCHLÜSSEL GROß MC9 S.C. CLÉ À COMPAS GRAND MODÈLE MC9 S.C.
19,00 19,00 19,00 19,00
HZ709003
PARTI RICAMBIO 2013-8_Layout 1 30/09/14 13.51 Pagina 70
70
Spare Parts Price List - Listino Pezzi Ricambio - Ersatzteilpreisliste - Pieces Detachees
SPECIFIC MC9 - MC9 S.C.
1ST STAGE REGULATORS TOOLS
Price -
€
1ST STAGE SETTING PRESSURE GAUGE
MANOMETRO TARATURA 1° STADIO MANOMETER JUSTIERUNG 1. STUFE MANOMÈTRE DE RÉGLAGE DU 1ER ÉTAGE
49,00 49,00 49,00 49,00
HZ710010
Price -
€
THREADED BAR TO TIGHTEN THE REGULATOR IN THE VICE
BARRA FILETTATA FISSAGGIO EROGATORE IN MORSA GEWINDESTAB ZUR BEFESTIGUNG DES ATEMREGLERS IM SCHRAUBSTOCK
ÉTAU À MAIN POUR MAINTIEN DU DÉTENDEUR DANS UN ÉTAU
9,00 9,00 9,00 9,00
HZ709008
Price -
€
YOKE NUT SOCKET AND WRENCH CHIAVE A BUSSOLA PER RIMOZIONE BLOCCASTAFFA SOCKET WRENCH TO REMOVE BRACKET NUT CLÉ À DOUILLE POUR DÉVISSAGE DE L’ÉCROU DE BLOCAGE D’ÉTRIER
56,00 56,00 56,00 56,00
HZ709012
Price -
€
REMOVING YOKE TOOL UTENSILE UNIVERSALE SMONTAGGIO STAFFA STECKSCHLÜSSEL ZUR ENTFERNUNG DER BEFESTIGUNGSMUTTER DES BÜGELS OUTIL UNIVERSEL DE DÉMONTAGE D’ÉTRIER CRESSI SUB
15,00 15,00 15,00 15,00
HZ709018
Price -
€
ALLEN KEY 6 mm CHIAVE ESAGONALE 6 mm SECHSKANTSCHLÜSSEL 6 mm CLÉ SIX PANS DE 6 mm
2,00 2,00 2,00 2,00
HZ709006
Price -
€
EXTRACTION POINT TOOL PUNTA DA ESTRAZIONE O-RING ENTFERNER POINTE D’EXTRACTION
4,50 4,50 4,50 4,50
HZ709004
Price -
€
TOOL TO REMOVE THE NOZZLE UTENSILE RIMOZIONE UGELLO WERKZEUG FÜR DIE ENTFERNUNG DER DÜSE OUTIL POUR L’EXTRACTION DU SIÈGE
4,00 4,00 4,00 4,00
HZ709016
Price -
€
BIG COMPASS MC9 S.C. SPANNER CHIAVE A COMPASSO GRANDE - MC9 S.C. VERSTELLBARER STIRNLOCHSCHLÜSSEL GROß MC9 S.C. CLÉ À COMPAS GRAND MODÈLE MC9 S.C.
19,00 19,00 19,00 19,00
HZ709003
PARTI RICAMBIO 2013-8_Layout 1 30/09/14 13.51 Pagina 70
70
Spare Parts Price List - Listino Pezzi Ricambio - Ersatzteilpreisliste - Pieces Detachees
SPECIFIC MC9 - MC9 S.C.
1ST STAGE REGULATORS TOOLS
Price -
€
1ST STAGE SETTING PRESSURE GAUGE
MANOMETRO TARATURA 1° STADIO MANOMETER JUSTIERUNG 1. STUFE MANOMÈTRE DE RÉGLAGE DU 1ER ÉTAGE
49,00 49,00 49,00 49,00
HZ710010
Price -
€
THREADED BAR TO TIGHTEN THE REGULATOR IN THE VICE
BARRA FILETTATA FISSAGGIO EROGATORE IN MORSA GEWINDESTAB ZUR BEFESTIGUNG DES ATEMREGLERS IM SCHRAUBSTOCK
ÉTAU À MAIN POUR MAINTIEN DU DÉTENDEUR DANS UN ÉTAU
9,00 9,00 9,00 9,00
HZ709008
Price -
€
YOKE NUT SOCKET AND WRENCH CHIAVE A BUSSOLA PER RIMOZIONE BLOCCASTAFFA SOCKET WRENCH TO REMOVE BRACKET NUT CLÉ À DOUILLE POUR DÉVISSAGE DE L’ÉCROU DE BLOCAGE D’ÉTRIER
56,00 56,00 56,00 56,00
HZ709012
Price -
€
REMOVING YOKE TOOL UTENSILE UNIVERSALE SMONTAGGIO STAFFA STECKSCHLÜSSEL ZUR ENTFERNUNG DER BEFESTIGUNGSMUTTER DES BÜGELS OUTIL UNIVERSEL DE DÉMONTAGE D’ÉTRIER CRESSI SUB
15,00 15,00 15,00 15,00
HZ709018
Price -
€
ALLEN KEY 6 mm CHIAVE ESAGONALE 6 mm SECHSKANTSCHLÜSSEL 6 mm CLÉ SIX PANS DE 6 mm
2,00 2,00 2,00 2,00
HZ709006
Price -
€
EXTRACTION POINT TOOL PUNTA DA ESTRAZIONE O-RING ENTFERNER POINTE D’EXTRACTION
4,50 4,50 4,50 4,50
HZ709004
Price -
€
TOOL TO REMOVE THE NOZZLE UTENSILE RIMOZIONE UGELLO WERKZEUG FÜR DIE ENTFERNUNG DER DÜSE OUTIL POUR L’EXTRACTION DU SIÈGE
4,00 4,00 4,00 4,00
HZ709016
Price -
€
BIG COMPASS MC9 S.C. SPANNER CHIAVE A COMPASSO GRANDE - MC9 S.C. VERSTELLBARER STIRNLOCHSCHLÜSSEL GROß MC9 S.C. CLÉ À COMPAS GRAND MODÈLE MC9 S.C.
19,00 19,00 19,00 19,00
HZ709003
PARTI RICAMBIO 2013-8_Layout 1 30/09/14 13.51 Pagina 70
MC9 1st STAGE
Service and Repair Operative Manual
JANNUARY 2009 - REV. MC9 /B - ED. C/13
144
This manual is restricted to Authorized Centers Cressi sub. Repair, maintenance, overhaul, calibration and any other intervention made to the dispensers must be made exclusively by trained
personnel of the Authorized Centers Cressi sub. Cressi sub accepts no responsibility for actions on the dispensers carried out by an authorized and specifically trained by the same Cressi sub.
Special tools
HZ 709004
extration
point tool
HZ 709016
tool to remove
the orifice
HZ 709006
allen key
6 mm
dynamometric
wrench
(unavailable)
HZ 709012
yoke nut socket
and wrench
HZ 710010
1st stage setting
pressure gauge
HZ 709008
threaded bar
to tighten the
regulator in
the vice
HZ 709018
removing
yoke tool

MC9 1st STAGE
MC9 1st Stage
Service and Repair Operative Manual
JANNUARY 2009 - REV. MC9 /B - ED. C/13
145
This manual is restricted to Authorized Centers Cressi sub. Repair, maintenance, overhaul, calibration and any other intervention made to the dispensers must be made exclusively by trained
personnel of the Authorized Centers Cressi sub. Cressi sub accepts no responsibility for actions on the dispensers carried out by an authorized and specifically trained by the same Cressi sub.
Disassembling procedures
• Remove and replace all O-rings;
• Use a plastic tool or a round pointed metal one in order not to damage the O-ring seat;
• To replace the O-ring correctly, press its sides to create a bulge inside which to insert the round pointed tool, as shown in the pictures;
• Attention: USE ONLY ORIGINAL CRESSI-SUB SPARE PARTS

MC9 1st STAGE
Service and Repair Operative Manual
JANNUARY 2009 - REV. MC9 /B - ED. C/13
146
This manual is restricted to Authorized Centers Cressi sub. Repair, maintenance, overhaul, calibration and any other intervention made to the dispensers must be made exclusively by trained
personnel of the Authorized Centers Cressi sub. Cressi sub accepts no responsibility for actions on the dispensers carried out by an authorized and specifically trained by the same Cressi sub.
Disassembling procedures
In case the regulator has been
used under water for a long time
and shows oxidation traces,
it may be useful to tap gently
with a plastic hammer all along
the perimeter of the area to be
removed.

MC9 1st STAGE INTMC9 1st STAGE
MC9 1st Stage
Service and Repair Operative Manual
JANNUARY 2009 - REV. MC9 /B - ED. C/13
147
This manual is restricted to Authorized Centers Cressi sub. Repair, maintenance, overhaul, calibration and any other intervention made to the dispensers must be made exclusively by trained
personnel of the Authorized Centers Cressi sub. Cressi sub accepts no responsibility for actions on the dispensers carried out by an authorized and specifically trained by the same Cressi sub.
Disassembling procedures

MC9 1st STAGE INTMC9 1st STAGE
Service and Repair Operative Manual
JANNUARY 2009 - REV. MC9 /B - ED. C/13
148
This manual is restricted to Authorized Centers Cressi sub. Repair, maintenance, overhaul, calibration and any other intervention made to the dispensers must be made exclusively by trained
personnel of the Authorized Centers Cressi sub. Cressi sub accepts no responsibility for actions on the dispensers carried out by an authorized and specifically trained by the same Cressi sub.
Disassembling procedures
Remove the bracket nut using the
special spanner, as shown in the
picture.
After inserting the threaded tool in
one of the first stage ports, tighten
the regulator in a vice.

HZ 709018
MC9 1st STAGE INTMC9 1st STAGE
MC9 1st Stage
Service and Repair Operative Manual
JANNUARY 2009 - REV. MC9 /B - ED. C/13
149
This manual is restricted to Authorized Centers Cressi sub. Repair, maintenance, overhaul, calibration and any other intervention made to the dispensers must be made exclusively by trained
personnel of the Authorized Centers Cressi sub. Cressi sub accepts no responsibility for actions on the dispensers carried out by an authorized and specifically trained by the same Cressi sub.
Disassembling procedures
In case the special spanner is not
available, the bracket nut can be
removed using a large adjustable
spanner as shown in the picture.

HZ 770080
HZ 800054
MC9 1st STAGE INTMC9 1st STAGE
Service and Repair Operative Manual
JANNUARY 2009 - REV. MC9 /B - ED. C/13
150
This manual is restricted to Authorized Centers Cressi sub. Repair, maintenance, overhaul, calibration and any other intervention made to the dispensers must be made exclusively by trained
personnel of the Authorized Centers Cressi sub. Cressi sub accepts no responsibility for actions on the dispensers carried out by an authorized and specifically trained by the same Cressi sub.
Remove the first stage bracket nut
and bracket.
Disassembling procedures

Kit OR DIN
HZ 800066
MC9 1st STAGE DINMC9 1st STAGE
MC9 1st Stage
Service and Repair Operative Manual
JANNUARY 2009 - REV. MC9 /B - ED. C/13
151
This manual is restricted to Authorized Centers Cressi sub. Repair, maintenance, overhaul, calibration and any other intervention made to the dispensers must be made exclusively by trained
personnel of the Authorized Centers Cressi sub. Cressi sub accepts no responsibility for actions on the dispensers carried out by an authorized and specifically trained by the same Cressi sub.
Disassembling procedures

MC9 1st STAGE DINMC9 1st STAGE
Service and Repair Operative Manual
JANNUARY 2009 - REV. MC9 /B - ED. C/13
152
This manual is restricted to Authorized Centers Cressi sub. Repair, maintenance, overhaul, calibration and any other intervention made to the dispensers must be made exclusively by trained
personnel of the Authorized Centers Cressi sub. Cressi sub accepts no responsibility for actions on the dispensers carried out by an authorized and specifically trained by the same Cressi sub.
Disassembling procedures
Using a threaded bar, tighten the first
stage body in a vice.
Unscrew the DIN connector from the
relating thread on the DIN filter, using
a 6 mm. Allen wrench.

MC9 1st STAGE DINMC9 1st STAGE
MC9 1st Stage
Service and Repair Operative Manual
JANNUARY 2009 - REV. MC9 /B - ED. C/13
153
This manual is restricted to Authorized Centers Cressi sub. Repair, maintenance, overhaul, calibration and any other intervention made to the dispensers must be made exclusively by trained
personnel of the Authorized Centers Cressi sub. Cressi sub accepts no responsibility for actions on the dispensers carried out by an authorized and specifically trained by the same Cressi sub.
Disassembling procedures
Warning: in case the disassembling
operations are difficult, do not carry
out them using wrench extensions,
since this might damage details of the
equipment!
In such case, we recommend to
contact Cressi-sub at once, before
carrying out any disassembling
operation.

HZ 800046
MC9 1st STAGE DINMC9 1st STAGE
Service and Repair Operative Manual
JANNUARY 2009 - REV. MC9 /B - ED. C/13
154
This manual is restricted to Authorized Centers Cressi sub. Repair, maintenance, overhaul, calibration and any other intervention made to the dispensers must be made exclusively by trained
personnel of the Authorized Centers Cressi sub. Cressi sub accepts no responsibility for actions on the dispensers carried out by an authorized and specifically trained by the same Cressi sub.
Disassembling procedures
Remove the DIN connector ring
from the DIN filter.

HZ 800049
MC9 1st STAGE DINMC9 1st STAGE
MC9 1st Stage
Service and Repair Operative Manual
JANNUARY 2009 - REV. MC9 /B - ED. C/13
155
This manual is restricted to Authorized Centers Cressi sub. Repair, maintenance, overhaul, calibration and any other intervention made to the dispensers must be made exclusively by trained
personnel of the Authorized Centers Cressi sub. Cressi sub accepts no responsibility for actions on the dispensers carried out by an authorized and specifically trained by the same Cressi sub.
Unscrew the DIN filter using
a 24 mm hexagonal spanner, as
shown in the picture.
Pay particular attention: unscrewing
the thread causes the inner valve
spring to lessen its resistance, which
might make the inner valve dart out
of its seat.
Disassembling procedures

HZ 800056
HZ 800058
MC9 1st STAGE
Service and Repair Operative Manual
JANNUARY 2009 - REV. MC9 /B - ED. C/13
156
This manual is restricted to Authorized Centers Cressi sub. Repair, maintenance, overhaul, calibration and any other intervention made to the dispensers must be made exclusively by trained
personnel of the Authorized Centers Cressi sub. Cressi sub accepts no responsibility for actions on the dispensers carried out by an authorized and specifically trained by the same Cressi sub.
Remove the bracket nut O-Ring (same as the DIN filter one)
and take the HP jacket-piston bush completely out of its seat.
Remove the
sintered filter
and take out
the first stage
valve completely.
Disassembling procedures