3. Preliminary Testing
(1) Preliminary testing of the regulator is necessary to identify any issues with the first and second
stages and verify the overall regulator function. This testing will include:
1.
Visual inspection of the first and second stages
2.
Inspection of the hoses
3.
Intermediate Pressure (IP) check
4.
Cracking pressure and second stage negative pressure test
Visual inspection is done to identify issues that could affect servicing and to ensure that pressurizing
the system will not compromise the safety of the service technician.
The technician will check all connections to make sure they are secure.
The technician will check that on the first stage, there are no extruded O-rings, and hoses are tight.
The technician will check there are no defects to the SPG.
The technician will ensure that the DIN assembly is secure, and the O-ring is intact and able to form a
seal.
The technician will inspect the filter for signs of discoloration.
Detailed inspection of hoses is done to ensure it is safe to pressurize the regulator set.
The technician will check all hoses, looking for evidence of possible failure.
The technician will check all hose connection crimps. Defects must be taken care of before
pressurizing the system! Replacement of any suspect hoses is recommended.
Caution Note: Defects in hoses require replacement before pressurizing the
regulator! Failure to do so may result in serious injury or death!
(2)
The technician will check the SPG for any signs of cracking of the face, water intrusion, and
corrosion around the SPG to the hose connection. If using a console or boot, it is necessary to remove
the SPG from the rubber boot. Once this is done, the HP spool should be inspected and, if necessary,
replaced.
(3)
The Intermediate Pressure (IP) of the system should be tested only after the preceding checks have
been done to ensure technician safety. Checking of intermediate pressure is done by attaching an IP
gauge to the low pressure (LP) inflator hose. The system is then pressurized while partially depressing
the purge button on one of the second stages. Depressing the purge button slightly on the second stage
is done to prevent further damage to the system by providing a relief valve should the IP rise rapidly to
unsafe levels. Once the system has been pressurized, the purge is released, and the IP checked.
Summary of Contents for DGX Gears XTRA
Page 1: ...DGX Gears XTRA First Stage Service Manual...
Page 32: ......
