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Uwatec MK 18 Repair Manual
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Uwatec MK 18 Repair Manual

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SCUBAPRO MK 18 First Stage
SCUBAPRO
Repair Guide
MK 18 First Stage
USE THIS GUIDE AS A REFERENCE WHEN SERVICING
THE MK 18 FIRST STAGE
2003 SCUBAPRO
1
Important note: The following information is not designed to be a complete training guide for servicing the listed SCUBAPRO regulators. All SCUBAPRO
technicians are required to attend an annual service training program to insure safe handling and servicing of SCUBAPRO products. All SCUBAPRO technicians
must be employed by an authorized SCUBAPRO facility.

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Summary of Contents for Uwatec MK 18

  • Page 1 SCUBAPRO MK 18 First Stage SCUBAPRO Repair Guide MK 18 First Stage USE THIS GUIDE AS A REFERENCE WHEN SERVICING THE MK 18 FIRST STAGE 2003 SCUBAPRO Important note: The following information is not designed to be a complete training guide for servicing the listed SCUBAPRO regulators. All SCUBAPRO technicians are required to attend an annual service training program to insure safe handling and servicing of SCUBAPRO products.

  • Page 2: Icon Legend

    SCUBAPRO MK 18 First Stage TOOLS NEEDED FOR REPAIR OF MK 18 TOOLS NEEDED Quantity Part Number Description Socket Wrench with 3/8” drive and 3” extension 20-155-500 1” Yoke Nut Socket (Peter Built) 20.270-100 Balance Chamber Tool (Peter Built) 1 set 10.102.100...
  • Page 3 SCUBAPRO MK 18 First Stage 5/32” Remove hoses from the first stage by using an adjustable wrench or 5/8” open-end wrench. Remove plugs using a 5/32” hex wrench. 6 mm Remove the plastic boot. Using a 6 mm hex wrench or the Universal Tool, thread out the intermediate pressure adjustment screw.
  • Page 4 SCUBAPRO MK 18 First Stage Use the Universal Tool to remove the end cap from the main regulator body. The spring and spring pad can now be removed. Remove the friction washer and diaphragm carefully. Remove the HP module button and pin.
  • Page 5 SCUBAPRO MK 18 First Stage Remove the swivel assembly. Remove the Hemispherical Chamber. 7/32” Use the Field Handle and 7/32” hex wrench to disassemble the swivel as shown. 2003 SCUBAPRO Important note: The following information is not designed to be a complete training guide for servicing the listed SCUBAPRO regulators. All SCUBAPRO technicians are required to attend an annual service training program to insure safe handling and servicing of SCUBAPRO products.
  • Page 6 SCUBAPRO MK 18 First Stage Using the Balance Chamber Tool, remove the balance chamber by threading out the unit in a counter clockwise direction. Turn the unit as shown to prevent loss of the HP seat and spring assembly. Remove the spring assembly.
  • Page 7 SCUBAPRO MK 18 First Stage Remove the Yoke Nut, Yoke and Saddle from the regulator body. 5/32” For DIN Regulators Remove the Filter retainer, filter, spring, and o’ring from the DIN Fitting using a 5/32” hex wrench. 2003 SCUBAPRO Important note: The following information is not designed to be a complete training guide for servicing the listed SCUBAPRO regulators. All SCUBAPRO technicians are required to attend an annual service training program to insure safe handling and servicing of SCUBAPRO products.
  • Page 8 SCUBAPRO MK 18 First Stage 6 mm For DIN Regulators Remove the DIN Fitting from the regulator body. Christo-Lube OXYGEN COMPATIBLE LUBRICANT P/N 41-047-000 Using a brass o’ring pick, remove the star retainer and filter. Clean and inspect all regulator parts.
  • Page 9 SCUBAPRO MK 18 First Stage Torque Torque the yoke nut to 266 in-lbs or 30 Newton-meters. Torque Christo-Lube OXYGEN COMPATIBLE LUBRICANT 6 mm P/N 41-047-000 For DIN Regulators Replace the DIN Fitting into the regulator body after inspection and lubrication of the fitting-to-body o’ring.
  • Page 10 SCUBAPRO MK 18 First Stage Torque 5/32” For DIN Regulators Replace the spring, filter, o’ring, and filter retainer. Torque to 35 in-lbs or 4 Newton-meters. No tools needed for this step Using the balance chamber (MK 16) tool, insert a new HP seat assembly into the regulator body after lubricating the HP seat o’ring properly.
  • Page 11 SCUBAPRO MK 18 First Stage Assemble the o’ring, (2) washers in the HP seat retainer. Insert the poppet assembly. Insert the HP seat retainer and tighten using the MK 16 tool. Torque 7/32” Reassemble the swivel retainer to the regulator cap using a 7/32” hex and torque wrench.
  • Page 12 SCUBAPRO MK 18 First Stage Insert the Hemispherical Chamber. Thread in the swivel assembly. Insert the pin, disc, diaphragm, diaphragm ring, diaphragm disc and spring. Be certain that the diaphragm is pressed evenly into place. 2003 SCUBAPRO Important note: The following information is not designed to be a complete training guide for servicing the listed SCUBAPRO regulators. All SCUBAPRO technicians are required to attend an annual service training program to insure safe handling and servicing of SCUBAPRO products.
  • Page 13 SCUBAPRO MK 18 First Stage No tools needed for this step TOOLS NEEDED Insert the pin, disc, diaphragm, diaphragm ring, diaphragm disc and spring. Be certain that the diaphragm is pressed evenly into place. Thread and tighten the diaphragm holder using the universal tool and first stage handle.
  • Page 14 SCUBAPRO MK 18 First Stage Thread in the spring screw (adjustment cap) and tighten flush with the 6 mm hex wrench or with the Universal tool. The cap will be adjusted to set the intermediate pressure in a subsequent step.

This manual is also suitable for:

Mk 16