Allis-Chalmers — Priming Low Pressure Fuel System - Standard Filters
Maintenance
From a Allis-Chalmers owner's manual covering: Series 606, Series 633, Series 649, Series 685. Check it applies to your exact model before use.
Procedure
- Check fuel level in tank and open fuel shut off valve.
- Make certain all plugs, vent cocks and line fittings on suction side of fuel transfer pump are tight.
- Open vent cock or plug.
- Loosen locking screw on hand primer pump and move clamp to one side, or unlock primer plunger.
- Move primer plunger back and forth in pumping motion to fill filter with fuel and expel air.
- When flow of fuel around vent is bubble free, tighten securely.
- Reposition primer pump clamp and retighten locking screw.
Source: Allis-Chalmers owner's 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.