How To Examine Compressed Air Mechanisms; Self-Purging Air Line Filter To Remove Moisture And Contamination - Milnor 48040F7J Maintenance Manual

Figure 14: Self-purging Air Line Filter to Remove Moisture and Other Contamination. These are
examples. Your machine can look different.
Filter/regulator—68036F5N
Washer-extractor
.
CAUTION 27 : Risks of injury and damage—
• Close the external shutoff valve and release remaining pressure before you do
maintenance.
Supplement 2

How to Examine Compressed Air Mechanisms

Your machine has one or more mechanisms that use compressed air for movement. To
examine a compressed air mechanism, look at the mechanism and listen to it in operation. Do
not touch the mechanism or put your hand in the machine. Usually you can see movement
directly or on a position indicator. Frequently, you can hear a valve open and close. When a
signal from the controller to operate the mechanism occurs, the air pressure must increase
sufficiently before movement occurs. When the signal stops, the system must release the
compressed air. You can usually hear the sound of the exhaust air for a short time.
When a compressed air mechanism operates correctly, its time of movement is usually less than
two seconds. The movement is smooth. It does not shake, change speed, or stop in the middle
of travel. A mechanism that does not operate correctly will cause unsatisfactory performance. If
the mechanism does not operate correctly and you cannot repair the problem, speak to your
dealer or Milnor. Possible causes are as follows:
• a blockage or a leak in the air tube,
• a worn pilot air valve,
• worn components in the mechanism,
• air pressure supplied to the machine is not sufficient,
• a component used to remove contamination from the air line is clogged,
• a quick exhaust valve or muffler is clogged,
• on machines with an air line lubricator, a malfunction or incorrect adjustment prevents
sufficient lubrication.
Filter—5040TG2_ Dryer
35
Chapter 3. Routine Maintenance
Legend
caution
1. Filter bowl. See
statement 27
. Do
maintenance if water
does not drain
automatically.
2. Filter element
3. Pressure adjustment knob
4. Air pressure gauge
5. Drain tube
PELLERIN MILNOR CORPORATION