 Starting in 1974, a 150 hp Komatsu SA4D105 air-cooled, 4-cylinder diesel engine was fitted.The commander is seated to the left of the two weapons and his position is attached to their mounting so that he remains at the same height when they are elevated for firing.The M40s can be fired from the lowered position, but their traverse is limited to 20°, elevation to +10° and depression to -5°.