Classic MachinesMachineryQ&MQuarryingFirst ‘super dozer’ Allis-Chalmers’ HD-41QM MagMarch 26, 2025October 28, 2026 by QM MagMarch 26, 2025October 28, 202604670 Image: This HD-41 is working in Europe with another Allis-Chalmers product, an HD-21, in the background. This photo shows how the rear decking was sloped...