JFD Divex SLS Mk IV, Operation And Maintenance Manual

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OM131 53
P1939-OM-131 R11 Chapter 4
C
HAPTER
4 - M
AINTENANCE
I
NSTRUCTION
C
ONTENTS
Page
4.1 Storage ......................................................................................................................................... 54
4.2 Maintenance schedules ................................................................................................................ 54
4.2.1 Weekly maintenance schedule ..................................................................................................... 54
4.2.2 Monthly maintenance schedule .................................................................................................... 54
4.2.3 Six monthly maintenance schedule .............................................................................................. 54
4.2.4 Annual maintenance schedule ...................................................................................................... 55
4.3 Preventative maintenance procedures ......................................................................................... 55
4.3.1 Weekly maintenance procedures ................................................................................................. 55
4.3.1.1 Cleaning ........................................................................................................................................ 55
4.3.1.2 Visual inspection ........................................................................................................................... 55
4.3.1.3 Check actuation of SLS system backpack .................................................................................... 58
4.3.1.4 Check gas flow from single stage regulator .................................................................................. 58
4.3.2
Monthly maintenance procedures ................................................................................................. 59
4.3.2.1 Perform weekly maintenance ....................................................................................................... 59
4.3.2.2 Check
scrubber door operation and sealing ................................................................................. 59
4.3.2.3 Check scrubber canister seal ....................................................................................................... 60
4.3.2.4 Check operation of two stage regulator ........................................................................................ 60
4.3.2.5 Check operation of single stage regulator .................................................................................... 60
4.3.2.6 Check operation of demand regulator .......................................................................................... 61
4.3.2.7 Replace actuation cable wiper sleeves ......................................................................................... 62
4.3.2.8 Strip and service the overpressure indicator ................................................................................ 62
4.3.2.9 Perform Leak Test ........................................................................................................................ 65
4.3.3
Six monthly maintenance procedures ........................................................................................... 65
4.3.3.1 Perform monthly maintenance ...................................................................................................... 65
4.3.3.2 Visual inspection of gas cylinders ................................................................................................. 65
4.3.4
Annual maintenance procedures .................................................................................................. 67
4.3.4.1 Visual inspection and testing of gas cylinders and HP pipework .................................................. 67
4.3.4.2 Strip down and service of two stage regulator .............................................................................. 67
4.3.4.3 Strip down and service of single stage regulator .......................................................................... 72
4.3.4.4 Strip down and service of demand regulator ................................................................................ 75
4.3.4.5 Perform six monthly maintenance ................................................................................................ 76
4.4 Fault diagnosis .............................................................................................................................. 77
4.5 Corrective maintenance ................................................................................................................ 78
4.5.1 Scrubber door replacement and torque setting ............................................................................ 78
4.5.2 Upper penetrator replacement ...................................................................................................... 79
4.5.2.1 Counterlung and demand valve penetrators ................................................................................. 79
4.5.2.2 Inhale / exhale hose penetrators .................................................................................................. 81
4.5.3
Lower penetrator replacement ...................................................................................................... 82
4.5.4 Charging point check valve seat replacement .............................................................................. 83
4.5.5 Burst disc replacement ................................................................................................................. 84
4.5.6 Demand regulator body replacement ........................................................................................... 85
4.5.7 Harness replacement .................................................................................................................... 85
4.5.7.1 Fitting of SLS harness assembly .................................................................................................. 87
4.5.8
Counterlung and enclosure replacement (Part no: CA2607) ........................................................ 90