The hopper lid on my Harman Accentra Insert no longer stays open and I’m looking to replace the hinge. Can anyone point me to instructions on how to remove and replace the hinge? There are three hex head screws on the bottom the the hopper (pictured) which are rusted on and stripped, and I’d like to see some verification that they need to be removed before I spend too much time on it... The owner’s manuals I found online are no use. Any help would be greatly appreciated!