Looking for info/manual for habanpull behind mower with 5hp briggs&stratton engine, two blades, 44in cut. Does anyone know where I can find?

Hi,
Haban went belly up years ago. There are some dealers and distributors that have aftermarket parts available. Try the search engine of your choice. I have seen the breakdown on a 42" mower and it looks like it is repurposing Murray parts.
Peace,
Clarke