There are 2 drawings for part 98-51812 available in AirCorps Library

Manufacturer's Drawing

North American Aviation,   B-25 Mitchell Drawings,   Page: --,   Revision: n/a  

LINE: - R. NAC. TO R. CHECK VALVE 2ND SECT. VAC.

Associated Aircraft:   B-25  

Manufacturer's Drawing

North American Aviation,   B-25 Mitchell Drawings - May / Sept 1945,   Page: --,   Revision: n/a  

LINE: - R. NAC. TO R. CHECK VALVE 2ND SECT. VAC.

Associated Aircraft:   B-25