The ornamental design for a drum housing for a juice extractor, as shown and described.
1. Drum housing for a juice extractor
1.1 Perspective view
1.2 : Front view
1.3 : Back view
1.4 : Left view
1.5 : Right view
1.6 : Top view
1.7 : Bottom view
1.8 : Cross-sectional view
1.9 : Reference view
Drawing 1.8 is a cross-sectional view taken along 1.8-1.8 of drawing 1.6. Drawing 1.9 is a reference view showing the state that the claimed design is assembled in a juice extractor, and the broken line showing environment forms no part of the claimed design.