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- Page 1 TECHNICAL SUPPORT MTX-R 2ND STAGE REGULATOR MAINTENANCE MANUAL AUTHORISED TECHNICIANS Issue 1 Document No. AP5837 10/05/2017 APEKS MARINE EQUIPMENT LTD, NEPTUNE WAY, BLACKBURN, LANCASHIRE. BB1 2BT Tel: +44 (0) 1254 692200 Fax: +44 (0) 1254 692211 E-mail: info@aqualung.uk Web: www.apeks.co.uk...
- Page 2 Amendments and approval of this document can only be carried out by the relevant people listed on the Approved list of signatures, which is listed in the Apeks Quality Manual. To instigate a change, a Task / Change request form, (Form No.
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Page 3: Table Of Contents
MTX-R 2nd Stage Maintenance Manual Contents COPyRIGHT NOTICE ............................. 4 INTRODUCTION ..............................4 WARNINGS, CAUTIONS & NOTES ........................4 SCHEDULED SERvICE ............................4 HOSE INSPECTION & CLEANING PROCEDURE....................4 GENERAL GUIDELINES ............................5 GENERAL CONvENTIONS ........................... 5 DISASSEMbLy PROCEDURES..........................5 REASSEMbLy PROCEDURES..........................9 FINAL TESTING..............................14... -
Page 4: Copyright Notice
Apeks Marine Equipment Ltd. However, If you are at all unsure about the correct ©2017 Apeks Marine Equipment Ltd. functioning of the Apeks MTX-R 2nd Stage then it must be officially inspected immediately. MTX-R 2nd Stage Regulator Maintenance Manual... -
Page 5: General Guidelines
Ring to create a during the cleaning procedure. protrusion. Grab Use only genuine Apeks parts provided in the 2nd ‘O’ Ring or insert stage service kit (AP0219). DO NOT attempt to substitute an Apeks part with another manufacturer’s, ‘O’... - Page 6 Removal of Diaphragm Removal of Hose 1. Using a 28mm spanner hold the Heat Exchanger 5. Using the MTX-R Front Cover Tool (PN AT94), (9) stationary while turning the Hose Swivel unscrew the Case Cover (2). anticlockwise with a 11/16” spanner. Then using a 5mm Hex key and holding the hose swivel with the 11/16”...
- Page 7 MTX-R 2nd Stage Maintenance Manual 8. Press the Lever (19) against the Valve Spindle 13. Remove the (17). While keeping the Lever depressed, grasp the Bumper (28) with a flat Bumper (28) and pull the Valve Spindle assembly out screwdriver.
- Page 8 MTX-R 2nd Stage Maintenance Manual 24. To remove the 19. Using a fingernail, Lever (19) pull one remove the Silicone of the legs out of the Seat (21) from the Valve Spindle (17) and shuttle valve (22). then ease the second leg out.
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Page 9: Reassembly Procedures
MTX-R 2nd Stage Maintenance Manual REASSEMbLy PROCEDURES Assembling and Fitting valve Assembly 4. Install a new, Fitting Exhaust valve and Exhaust Tees lubricated ‘O’ Ring (10) onto the Valve Spindle. (17). 1. If the Exhaust Valve (29) was removed, replace by... - Page 10 MTX-R 2nd Stage Maintenance Manual 8. If the Spindle Collar 10. Ensure that the Spindle Collar (18) is rotated (18) was removed to the correct position for the required Hose during the disassembly configuration. process refit the Collar using a set of circlip pliers.
- Page 11 Spring Pin are clear. configured as Right Handed, then the arrow must be aligned to the line with RIGHT underneath. See the section titled Converting the MTX-R Regulator to Left Handed Configuration on page 16 for further information.
- Page 12 MTX-R 2nd Stage Maintenance Manual 21.Using an 28mm 18. While depressing crows foot, tighten the the Lever, insert the heat exchanger to a Valve Spindle through torque of 3 Nm (2.2 ft/ the Venturi Lever lb). assembly and into the...
- Page 13 MTX-R 2nd Stage Maintenance Manual 26. Screw the Case Cover (2) onto the Case. Using 30. Screw the Hose the MTX-R Tool (AT94) tighten the Cover until it stops. onto the second Confirm that the Purge Button is properly aligned.
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Page 14: Final Testing
MTX-R 2nd Stage Maintenance Manual FINAL TESTING NOTE: Check the lever is vertical. Refer to steps 20 & 21 on page 12 Warning: Compressed air can be highly explosive and is dangerous if misused. NOTE: Check that the Venturi lever body is lined Ensure cylinder valve is opened slowly. - Page 15 MTX-R 2nd Stage Maintenance Manual External Leak Test Second Stage Opening Effort Test 1. Connect the first stage regulator with an interstage 1. After disconnecting the regulator from the pressure gauge fitted to a calibrated test bench and flow bench, connect it to a gas cylinder filled to pressurise the system to 207 bar.
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Page 16: Converting To Left Hand Configuration
MTX-R 2nd Stage Maintenance Manual CONvERTING THE MTX-R REGULATOR Remove the two ‘O’ TO LEFT HANDED CONFIGURATION Rings (10) & (12) from the Blanking Piece (11). Grasp the Venturi Lever Assembly (13 & 14) and Right Handed Left Handed pull it out of the Case. - Page 17 MTX-R 2nd Stage Maintenance Manual CAUTION: Ensure that the parts of the CAUTION: Ensure that the Spindle Collar Venturi Lever assembly are firmly pressed clicks firmly into position and that the entire together. There should be a step as shown in valve Spindle Hole is visable.
- Page 18 MTX-R 2nd Stage Maintenance Manual 16.Using an 28mm 20. Fix the second stage into a soft jawed vice as crows foot, tighten the explained in section 15. Heat Exchanger (9) to a torque of 3 Nm (2.2 ft/lb). CAUTION: Excessive tightening of the Heat Exchanger will damage the blanking Piece and Case.
- Page 19 MTX-R 2nd Stage Maintenance Manual Table 1 - Troubleshooting Guide SyMPTOM POSSIbLE CAUSE TREATMENT 1. Excessively high first-stage intermediate 1. Refer to first-stage Troubleshooting pressure. Guide. 2. Silicone Valve Seat (21) damaged or 2. Replace Silicone Seating. worn. 3. Seat (16) adjusted incorrectly, Lever (19) 3.
- Page 20 MTX-R 2nd Stage Maintenance Manual Table 2 - Recommended Tool List PART # DESCRIPTION APPLICATION IMAGE AT79 O Ring Removal Pick O Ring Removal AT94 Front Cover Tool Case Cover Removal and Installation / Setting of Lever Height AT51/L Slotted Seat Adjuster...
- Page 21 MTX-R 2nd Stage Maintenance Manual Table 3 - Recommended Lubricants & Cleaners LUbRICANT / CLEANER APPLICATION SOURCE Christo-Lube MCG-111 All O ring seals Lubrication Technologies ® (Lubricant). 310 Morton Street Jackson, OH 45640, USA (800) 477-8704, or Apeks Marine Equipment Ltd PerFluoroLube 20/1 (Lubricant).
- Page 22 MTX-R 2nd Stage Maintenance Manual Table 4 - Torque Specifications PART NUMbER DESCRIPTION / KEy NUMbER TORqUE AP2004S Heat Exchanger 3 Nm / 2.2 ft/lb AP0198/DSW Double Swivel 3/8” Flexi 5 Nm / 3.7 ft/lb Table 5 - Test Bench Specifications...
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Page 23: Cleaning And Lubrication Procedure
MTX-R 2nd Stage Maintenance Manual Cleaning & Lubrication Procedure Cleaning brass and Stainless Steel Parts If required, pre-clean in warm, soapy water* using a nylon bristle tooth brush. Thoroughly clean parts in an ultrasonic cleaner filled with a solution of household white distilled vinegar (Acetic Acid) mixed with fresh water (max 50% vinegar). -
Page 24: Exploded Parts Drawings
MTX-R 2nd Stage Maintenance Manual Exploded Parts Diagram AP0064 MTX-R All items in bold italics to be replaced when servicing. Service kit AP0219 AP0295 Purge Button Assembly AP6215 Spindle Collar AP2000SE MTX-R Front Cover AP2035 Lever AP5802 Inner Cover AP1151... - Page 25 MTX-R 2nd Stage Maintenance Manual Exploded Parts Diagram AP0065 MTX-R Octopus All items in bold italics to be replaced when servicing. Service kit AP0219 AP0295Y Purge Button Octopus Assembly AP6215 Spindle Collar AP2000SYE MTX-R Front Cover Octo AP2035 Lever AP5802...
- Page 26 MTX-R 2nd Stage Maintenance Manual Exploded Parts Diagram NP0064 MTX-R Nitrox All items in bold italics to be replaced when servicing. Service kit AP0219 AP0295G Purge Button Nitrox Assembly AP6215 Spindle Collar AP2000SE MTX-R Front Cover AP2035 Lever AP5802 Inner Cover...
- Page 28 TECHNICAL SUPPORT MTX-R 2ND STAGE REGULATOR MAINTENANCE MANUAL AUTHORISED TECHNICIANS...
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