Service manual

10 Service Manual Mikron 2nd Stage
Table 1. Troubleshooting Guide
SYMPTOM POSSIBLE CAUSE TREATMENT
1. MP too high
1. Refer to First stage Troubleshooting
Guide
2. The valve (AP2034) is worn or damaged. 2. Replace the valve
Leak or free flow at 2
nd
stage
3. The seat (AP2033) is not correctly
adjusted
3. Readjust the seat
4. The lever (127828) is bent 4. Replace the lever
5. The sealing face of the seat (AP2033) is
damaged.
5. Replace the seat
6. The spring (AP2021) is damaged 6. Replace the spring
1. MP too low
1. Refer to First stage Troubleshooting
Guide
2. The adjusting screw 127823 is not
correctly adjusted
2.Readjust the adjusting screw
Insufficient purge flow or work of
breathing too high
3. The valve (AP2033) is not correctly
adjusted, the lever adjustment is too low
3. Readjust the lever and the valve
4. MP hose obstructed 4. Clean or replace the hose
5. The lever (127828) is bent 5. Replace the lever
1. Hole in mouthpiece (123697) 1. Replace the mouthpiece
2. Diaphragm (129150) damaged 2. Replace the diaphragm
3. Exhalation valve (129174) damaged 3. Replace the valve
Water leak
4. The cam O-ring (473057) is dirty, worn or
damaged
4. Replace the O-ring
5. 5. The diaphragm is not correctly fitted
between the casing and the washer
(127815)
5. Disassemble the purge button and
refit the assembly correctly
6. The casing is damaged.
6. Check the sealing face of the
exhalation valve. Replace the casing
7. The O-rings (127707 and/or 121130) are
damaged.
7. Replace the O-ring
8. The insert O-ring (124706) is damaged. 8. Replace the O-ring