Allis-Chalmers — Removing Thermostat With Engine Cooled
Repair & overhaul
From a Allis-Chalmers operator's manual covering: 6138, 685, SERIES 6138, SERIES 670. Check it applies to your exact model before use.
Procedure
- Drain cooling system
- If applicable, remove coolant bypass tube or hose
- Remove cap screws and lockwashers that secure water outlet flange to thermostat housing
- Raise flange with hose intact
- Remove gasket with thermostat
- Clean, inspect, and test, replace thermostat
Source: Allis-Chalmers operator'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.