Scott AIR-PAK 75i 2.2 Operating & Maintenance Instructions page 13

5. If the hose to the breathing regulator is equipped with a quick dis-
connect, inspect both the male and female quick disconnects. Pay
special attention to the following:
a) Inspect the operation of the locking sleeve on the female quick
disconnect. If any damage is noted, remove it from service and
tag for repair.
b) Inspect the condition of the male quick disconnect for signs of
wear. Particularly look for wear on the locking ridge as shown in
FIGURE 5. If the coating is worn through and bare metal is show-
ing, do not use the regulator assembly. Remove it from service
and tag for replacement.
FIGURE 5
Inspecting Male
Quick Disconnects
6. Verify that the quick disconnect operates properly. Breathing regu-
lators equipped with a quick disconnect use a Pull-back Sleeve
Coupling. See FIGURE 6. To separate, push the plug "D" into the
socket while pulling the locking sleeve "E" back toward the guard.
The plug "D" will separate. To connect, push the plug "D" into the
socket until it engages with a "click."
7. If the regulator is not attached to the facepiece, proceed as
follows:
PUSH PLUG IN
Pull-back Sleeve Quick Disconnect
a) Align the two flats of the regulator outlet port with the correspond-
ing flats in the facepiece port (the red purge valve on the regula-
tor will be in the 12 o'clock position). Insert the regulator into the
facepiece port.
b) Rotate the regulator counterclockwise (as viewed from inside of
facepiece) until the red purge valve knob is on the left side of the
facepiece. The lock tab on the regulator will lock into the facepiece
retainer with a "click." When the lock tab is properly engaged, the
regulator will not rotate.
8. If the hose to the breathing regulator is equipped with a quick
disconnect, check that the quick disconnect is engaged properly
by tugging on the coupling.
9. Verify that a FULL cylinder is properly installed in the backframe
and that the reducer hose coupling is hand tightened to the cyl-
inder valve outlet.
If no damage is found, proceed to the OPERATIONAL TESTING.
E
D
PULL SLEEVE
BACK
PULL PLUG OUT
FIGURE 6
LOOK FOR WEAR
ON LOCKING
RIDGE
Page 13 of 44
WARNING
IF THE COATING IS WORN THROUGH AND
BARE METAL IS SHOWING ON THE MALE
QUICK DISCONNECT LOCKING RIDGE, RE-
MOVE THE REGULATOR ASSEMBLY FROM
SERVICE AND TAG FOR REPLACEMENT.
USE OF A WORN QUICK DISCONNECT MAY
RESULT IN A MALFUNCTION LEADING TO
A LOSS OF BREATHING AIR WHICH COULD
RESULT IN SERIOUS INJURY OR DEATH.
WARNING
FAILURE TO CHECK ENGAGEMENT OF THE
COUPLING AS DESCRIBED MAY LEAD TO
HOSE SEPARATION AND LOSS OF BREATH-
ING AIR RESULTING IN SERIOUS INJURY
OR DEATH.
CAUTION
WRENCHES SHALL NOT BE USED TO TIGHT-
EN THE HOSE COUPLING. OVER TIGHTEN-
ING THE HOSE COUPLING MAY DAMAGE
THE GASKET SEAL.
REGULAR OPERATIONAL
INSPECTION CONTINUED
ON NEXT PAGE...
P/N 595236-01 Rev. B 10/11