diff --git a/cura/Settings/ExtruderManager.py b/cura/Settings/ExtruderManager.py
index 0f8cb9ae23..8c436ed24f 100755
--- a/cura/Settings/ExtruderManager.py
+++ b/cura/Settings/ExtruderManager.py
@@ -461,10 +461,6 @@ class ExtruderManager(QObject):
             if global_stack.definitionChanges.hasProperty(key, "value"):
                 global_stack.definitionChanges.removeInstance(key, postpone_emit = True)
 
-        # Update material diameter for extruders
-        for position in extruder_positions_to_update:
-            self.updateMaterialForDiameter(position, global_stack = global_stack)
-
     ##  Get all extruder values for a certain setting.
     #
     #   This is exposed to SettingFunction so it can be used in value functions.
@@ -563,88 +559,7 @@ class ExtruderManager(QObject):
             if not global_stack:
                 return
 
-        if not global_stack.getMetaDataEntry("has_materials", False):
-            return
-
-        extruder_stack = global_stack.extruders[str(extruder_position)]
-
-        material_diameter = extruder_stack.material.getProperty("material_diameter", "value")
-        if not material_diameter:
-            # in case of "empty" material
-            material_diameter = 0
-
-        material_approximate_diameter = str(round(material_diameter))
-        material_diameter = extruder_stack.definitionChanges.getProperty("material_diameter", "value")
-        setting_provider = extruder_stack
-        if not material_diameter:
-            if extruder_stack.definition.hasProperty("material_diameter", "value"):
-                material_diameter = extruder_stack.definition.getProperty("material_diameter", "value")
-            else:
-                material_diameter = global_stack.definition.getProperty("material_diameter", "value")
-                setting_provider = global_stack
-
-        if isinstance(material_diameter, SettingFunction):
-            material_diameter = material_diameter(setting_provider)
-
-        machine_approximate_diameter = str(round(material_diameter))
-
-        if material_approximate_diameter != machine_approximate_diameter:
-            Logger.log("i", "The the currently active material(s) do not match the diameter set for the printer. Finding alternatives.")
-
-            if global_stack.getMetaDataEntry("has_machine_materials", False):
-                materials_definition = global_stack.definition.getId()
-                has_material_variants = global_stack.getMetaDataEntry("has_variants", False)
-            else:
-                materials_definition = "fdmprinter"
-                has_material_variants = False
-
-            old_material = extruder_stack.material
-            search_criteria = {
-                "type": "material",
-                "approximate_diameter": machine_approximate_diameter,
-                "material": old_material.getMetaDataEntry("material", "value"),
-                "brand": old_material.getMetaDataEntry("brand", "value"),
-                "supplier": old_material.getMetaDataEntry("supplier", "value"),
-                "color_name": old_material.getMetaDataEntry("color_name", "value"),
-                "definition": materials_definition
-            }
-            if has_material_variants:
-                search_criteria["variant"] = extruder_stack.variant.getId()
-
-            container_registry = Application.getInstance().getContainerRegistry()
-            empty_material = container_registry.findInstanceContainers(id = "empty_material")[0]
-
-            if old_material == empty_material:
-                search_criteria.pop("material", None)
-                search_criteria.pop("supplier", None)
-                search_criteria.pop("brand", None)
-                search_criteria.pop("definition", None)
-                search_criteria["id"] = extruder_stack.getMetaDataEntry("preferred_material")
-
-            materials = container_registry.findInstanceContainers(**search_criteria)
-            if not materials:
-                # Same material with new diameter is not found, search for generic version of the same material type
-                search_criteria.pop("supplier", None)
-                search_criteria.pop("brand", None)
-                search_criteria["color_name"] = "Generic"
-                materials = container_registry.findInstanceContainers(**search_criteria)
-            if not materials:
-                # Generic material with new diameter is not found, search for preferred material
-                search_criteria.pop("color_name", None)
-                search_criteria.pop("material", None)
-                search_criteria["id"] = extruder_stack.getMetaDataEntry("preferred_material")
-                materials = container_registry.findInstanceContainers(**search_criteria)
-            if not materials:
-                # Preferred material with new diameter is not found, search for any material
-                search_criteria.pop("id", None)
-                materials = container_registry.findInstanceContainers(**search_criteria)
-            if not materials:
-                # Just use empty material as a final fallback
-                materials = [empty_material]
-
-            Logger.log("i", "Selecting new material: %s", materials[0].getId())
-
-            extruder_stack.material = materials[0]
+        Application.getInstance().getMachineManager()._updateMaterialWithVariant(extruder_position)
 
     ##  Get the value for a setting from a specific extruder.
     #