LetsTalkSnow.com - Addict
Join Date: Sep 2018
Location: Catskill Mountains, NYS
Sadly, Tuxy007 that one manual is all I could online for an Isarmatic Mark IIIa plow setup... that would be my guess as to what you have on your truck. Perhaps on EBay you can find other manuals once you get a serial number or model number.
So, how much snow do you get in your area?