Scott AIR-PAK 75 Operating & Maintenance Instructions page 37

Procedure A – AIR-PAK 75 SCBA Backframe
6. disengage the cylinder retention strap by gripping the latch plate as
shown in FIguRE 17 and lifting on the end of the latch.
RETENTION
STRAP
CYLINDER RETENTION
7. grasp the cylinder below the retention strap, push the locking tab
below the valve, then lift the cylinder free from the bottom hook and
remove. See FIguRE 18.
FIGURE 18
LOCKING TAB MECHANISM
AIR-PAK 75 SCBA
8. Replace with a fully charged cylinder and valve assembly of the same
pressure rating. Slide the top of the cylinder upward under the strap.
9. Engage the cylinder hanger in the hook at the bottom of the back-
frame.
FOR 4500 PSIg OR 5500 PSIg RESPIRATORS: IF A dIFFEREnT duRA-
TIOn OR dIAmETER CYLIndER IS uSEd, uSE THE TRI-SLIdE BuCKLE
TO AdJuST THE RETEnTIOn STRAP SO THAT IT PRESSES TIgHTLY
AgAInST THE CYLIndER WHEn THE LATCH ASSEmBLY IS FuLLY
EngAgEd. THE uSER SHOuLd nOT BE ABLE TO mOVE RETEnTIOn
STRAP uP And dOWn On THE CYLIndER WITH THEIR FIngERS
WHEn THE LATCH ASSEmBLY IS FuLLY CLOSEd.
10. Secure the cylinder in place by pushing the latch toward the back-
frame to lock the cylinder latch and fully engage the cylinder latch
assembly.
EnSuRE THAT THE CYLIndER IS SECuRELY HELd In PLACE On THE
BACKFRAmE BY THE CYLIndER RETEnTIOn ASSEmBLY. dO nOT
uSE EXCESSIVE FORCE TO LOCK THE LATCH mECHAnISm. IF THE
RETEnTIOn STRAP IS TOO TIgHT OR TOO LOOSE, uSE THE TRI-
SLIdE BuCKLE TO AdJuST THE RETEnTIOn STRAP EngAgEmEnT
LEngTH, THEn RE-ATTEmPT TO EngAgE THE LATCH ASSEmBLY.
LATCH
PLATE
FIGURE 17
LOCKING
TAB
NOTE
NOTE
Continue with Step 11 below.
Page 37 of 48
CYLINDER REPLACEMENT
CONTINUED ON NExT PAGE...
P/N 595252-01 Rev. B 5/14