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6
DiSASSEMBLy pROCEDuRE
NOTE:
Before performing any disassembly, refer
to the exploded parts drawing, which references all
mandatory replacement parts. These parts should
be replaced with new, and must not be reused
under any circumstances – regardless of the age of
the regulator or how much use it has received since
it was last serviced.
CAUTION:
use only a plastic or brass o-ring removal
tool (p/n 944022) when removing o-rings to prevent
damage to the sealing surface. Even a small scratch
across an o-ring sealing surface could result in
leakage. Once an o-ring sealing surface has been
damaged, the part must be replaced with new. DO
NOT use a dental pick or any other steel instrument.
Breathing hose Disassembly
1. using a small slotted screwdriver and a 7/32" (5.5mm)
open-end wrench, remove the two hose clamps (19).
Next, remove the breathing hose assembly from the
regulator housing.
2. unscrew the connector ring (4) on each side of the
mouthpiece and separate the mouthpiece body (8) from the
hoses. with a small slotted screwdriver, remove each hose
clamp (3). Remove the inlet connector (5) and outlet
connector (11) from the hoses. slide the connector rings (4)
off the connectors.
3
4
3. Remove the o-ring (6) from each connector. The
preferred method is to pinch the o-ring between the thumb
and forefinger to lift it off the connector then a pick can be
slid underneath to remove it. exercise caution not to scratch
the o-ring groove. both o-rings are replaced during a
standard overhaul service.
MENTOR Technical Maintenance Manual
4. gently pull out the non return valve (7) from the inlet
connector (5). This valve is replaced during a standard
overhaul service.
5. Remove the exhalation valve support (9) from the outlet
connector by prying it out with a fingernail or the edge of a
credit card. Remove the outer o-ring (10) and the non return
valve (7) from the exhalation valve support (9). both the
o-ring and the valve are replaced during a standard overhaul
service.
6. with a pair of side cutters, cut the clamp (12) that holds
the mouthpiece. exercise caution not to cut the mouthpiece
underneath. A new clamp comes in the overhaul service kit.
Remove the mouthpiece assembly (13), lip cover (14) and
strap (15) from the mouthpiece body (8).
Regulator housing Disassembly
1. With a medium flat blade screwdriver, remove the clamp
5
screw (16). gently stretch the clamp (17) open and remove
it from the housing. separate the inhalation box (25) and the
exhalation box (20). Remove the large inhalation diaphragm
(22). The diaphragm is normally replaced during standard
overhaul service.
12
14
13
16
17
20
15
8
25
22
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