U.S. Divers Impulse

Table of Contents
Introduction .................................................................................................... 1
Warnings, Cautions, & Notes ........................................................................................... 1
Scheduled Service ........................................................................................................... 1
General Guidelines ........................................................................................................... 1
Initial Inspection Procedure .......................................................................... 2
External Inspection ........................................................................................................... 2
Pressure Test .................................................................................................................... 2
Disassembly Procedures............................................................................... 3
Reassembly Procedures................................................................................ 6
Final Adjustment & Testing Procedures..................................................... 10
Second Stage Air Flow Test............................................................................................ 12
Second Stage Opening Effort Test ................................................................................. 12
Second Stage Purge Flow Test ...................................................................................... 12
External Leak Test .......................................................................................................... 12
Subjective Breathing Test ............................................................................................... 13
Table 1 - Troubleshooting Guide ................................................................. 14
Table 2 - Recommended Tool List ............................................................... 15
Table 3 - Standard Parts Replacement Schedule ...................................... 15
Table 4 - Torque Specifications ................................................................... 16
Table 5 - Test Bench Specifications ............................................................ 16
Procedure A - Cleaning & Lubrication ....................................................... 17
Table A - Recommended Lubricants & Cleaners ...................................... 18