Figure 4-4. Flow control valve.
b. Disassemble and Repair the Pilot-Operated Pressure Switch Unloader
Valve. You can disassemble, clean, and repair the unloader valve as required. Refer
to figure 4-5 and use the following procedures.
This assembly is factory installed on M5A compressors, Serial Number 2100
and above. It may be installed on any M5 series compressor by following the
steps outlined in paragraph 4-3b(8).
(1) Remove the unloader valve from the pressure switch bracket by
removing the nut and lock washer.
Remove the inlet tee from the valve body.
Remove the strainer from the inlet tee.
Tilt the valve body to remove the valve seat pin assembly.
Remove the muffler from the valve body and clean if necessary.
Do not plug the muffler port in any manner.