Uwatec MK 18 Assembly instructions

SCUBAPRO 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. All SCUBAPRO technicians
must be employed by an authorized SCUBAPRO facility.
1
SCUBAPRO
Repair Guide
MK 18 First Stage
USE THIS GUIDE AS A REFERENCE WHEN SERVICING
THE MK 18 FIRST STAGE

SCUBAPRO 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. All SCUBAPRO technicians
must be employed by an authorized SCUBAPRO facility.
2
TOOLS NEEDED FOR REPAIR OF MK 18
P/N43040000
TOOLS
NEEDED
Quantity Part Number Description
1 Socket Wrench with 3/8” drive and
3” extension
1 20-155-500
(Peter Built)
1” Yoke Nut Socket
20.270-100
(Peter Built)
Balance Chamber Tool
1 set 10.102.100
(Peter Built)
Brass o’ring picks
1 tube 41.047.000 Christo-Lube Christo-Lube
OXYGEN COMPATIBLE LUBRICANT
P/N 41-047-000
1 47.010.000 Counter Mat
1 41.496.101 Lubricant syringe Monoject
1 43.040.000 Universal Tool
1 20-115-100
(Peter Built)
First Stage Handle
2 Torque Wrench with 3/8” drive -
100 in-lb range and 600 in-lb range
1 Hex Key Set: 7/32” and 6mm
1 Crescent wrench
1 20.500.200
(Peter Built)
Pneumatic Adjusting tool
1 18.300.500
(Peter Built)
Blow Gun/Air Nozzle
ICON LEGEND
Inspect carefully, replace if needed
Monoject Lubricate properly
Replace annually
Dynamic o’ring, lubricate properly
P/N43040000
TOOLS
NEEDED
No tools needed for this step
Indicates the regulators affected by this step

SCUBAPRO 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. All SCUBAPRO technicians
must be employed by an authorized SCUBAPRO facility.
3
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.

SCUBAPRO 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. All SCUBAPRO technicians
must be employed by an authorized SCUBAPRO facility.
4
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.
Remove the pin carefully to ensure it is
not lost.
Remove the spring.
Using the Universal tool and Field
Handle, loosen the swivel assembly.

SCUBAPRO 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. All SCUBAPRO technicians
must be employed by an authorized SCUBAPRO facility.
5
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.

SCUBAPRO 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. All SCUBAPRO technicians
must be employed by an authorized SCUBAPRO facility.
6
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.
Remove the HP seat using the brass
picks. The HP seat will be replaced.
Use caution to prevent damaging the
regulator body.
Alternatively, use the air gun and
Balance Chamber tool to remove the
HP seat.

SCUBAPRO 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. All SCUBAPRO technicians
must be employed by an authorized SCUBAPRO facility.
7
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.

SCUBAPRO 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. All SCUBAPRO technicians
must be employed by an authorized SCUBAPRO facility.
8
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.
Replace the conical filter. Inspect and
lubricate the static yoke nut o’ring.
Replace the o’ring if needed.

SCUBAPRO 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. All SCUBAPRO technicians
must be employed by an authorized SCUBAPRO facility.
9
1
2
3
4
5
4
3
2
1
Torque
Torque the yoke nut to 266 in-lbs or 30
Newton-meters.
6 mm
Christo-Lube
OXYGEN COMPATIBLE LUBRICANT
P/N41-047-000
1
2
3
4
5
4
3
2
1
Torque
For DIN Regulators
Replace the DIN Fitting into the
regulator body after inspection and
lubrication of the fitting-to-body o’ring.
Torque to 266 in-lbs or 30 Newton-
meters.

SCUBAPRO 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. All SCUBAPRO technicians
must be employed by an authorized SCUBAPRO facility.
10
5/32”
1
2
3
4
5
4
3
2
1
Torque
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.
Assemble the HP poppet, spring and
washers.

SCUBAPRO 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. All SCUBAPRO technicians
must be employed by an authorized SCUBAPRO facility.
11
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.
7/32”
1
2
3
4
5
4
3
2
1
Torque
Reassemble the swivel retainer to the
regulator cap using a 7/32” hex and
torque wrench. Apply 70 in-lbs/8
Newton-meters.

SCUBAPRO 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. All SCUBAPRO technicians
must be employed by an authorized SCUBAPRO facility.
12
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.

SCUBAPRO 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. All SCUBAPRO technicians
must be employed by an authorized SCUBAPRO facility.
13
P/N43040000
TOOLS
NEEDED
No tools needed
for this step
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.

SCUBAPRO 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. All SCUBAPRO technicians
must be employed by an authorized SCUBAPRO facility.
14
6mm
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.
Replace the plastic cap. It is possible
to make intermediate pressure
adjustments with the plastic cap in
place.
6mm
Attach the second stage regulator
through the pneumatic adjusting tool.
Do an air-on test to determine the
intermediate pressure.
Adjust the intermediate pressure using
the 6mm hex wrench or Universal tool.
Increase intermediate pressure by
turning clockwise.
Intermediate pressure should be
between 125 and 145 psi at 3000 psi
and 300 psi.