The AHRM hydraulic mower deck was designed for the 41xx and 31xx tractors. These tractors have a larger displacement hydraulic pump than 40xx tractors. The deck would turn but not fast enough due to the reduced gpm's.
I have a 4120, all Hydrolic tractor, and it came with a 5 foot deck. (I don't cut grass with a case, ad I have been using a zero turn for a few years, but I must say I was impressed with the cut from the Hydrolic deck. I say it cut almost as good as my zero turn. The problem in my opinion is the turning radius.
ON the other hand I love my 4120 using the Hydrolic snowblower. I picked it up after I got the 4120.
There's a 4118-D listed for sale on the Eau Claire, Wisconsin Facebook Marketplace. No deck, but would have the higher capacity pump. Might be a good platform for any sort of hydraulic attachment projects. Not my listing.
Here is the specs on FleetGuard hydraulic oil filters, look at the HF6520 for specifics about this filter that is sometimes supplied under P/N C33039 from Ingersoll.:geek:I do have a better...