Hummel
Member
I have the name plate off of the injection pump: Model # DBGFCC.431.4A. Serial # 2197938 MFG # 135874 It is a Stanadyne. I can't find a side window or two flat head screws. There is a little bolt, maybe 12" that could be a drain on the side of the pump. The return line has a drip, drip, drip.