Allmand — Change of Pellet Assembly of By-pass Valve
Repair & overhaul
From a Allmand service manual — check it applies to your exact model before use.
Procedure
- Stop the unit and make sure no residual pressure is left in the separator receiver tank.
- Confirm compressor oil temperature is amply low, open drain valves to empty oil completely.
- Remove bolt 1, then the pellet assembly 2 and O-ring 3.
- Replace pellet assembly and O-ring with new ones; install O-ring coated thinly with compressor oil.
- Supply compressor oil through the filler port on the receiver tank.
- Start operation and check the function of by-pass valve.
Specs & values
- By-pass valve actuating temperature: 180±37°F (82±3℃)
- By-pass valve fully closing temperature: 192±36°F (89±2℃)
Source: Allmand service manual. Steps and values are as documented; always cross-check against the official manual and any later revisions for your exact serial number before servicing.