I used a 4" ID x 24" ram. I have back issues so I raised mine up on 3.5 foot legs and kept it horizontal. Mine uses a section of railroad track turned up side down for the ways or slide. The first car rim I squished I snapped the railroad track in half. Now that's power! BTW there is no need to...
Plenty of power. I built one myself. Works so well I can bend car wheels into squares while they're still mounted with tires (easier than dismounting the regular way, then I scrap the rims---the rim just drops out of the tire)
I would go with the LS185.b or newer. I have an '05 and am pleased with it. Plenty of power. Engine is loud but you get used to it or wear hearing protection. I had an LS180 and it was bought back by NH for being so noisey.
Try this: my dealer let's me make copies of each page or section of the service manual for a buck a page. It sounds expensive but their mechanic also makes notes in the margins which are invaluable. It works out to be a little cheaper to do it this way, but not by much.
Have you cleaned the vertical strainer near the front right side of the seat area? It sounds like the pump is starving for oil and cavitating, which if the strainer is clogged will happen. My 555's strainer had an organic "snot" all over it.
My bet is the diode. Easy to check with a VOM. It's encased in a black rubber "connector" of sorts similar to what you'd find on a two wire electrical connector. Dealer gets $15, but I made my own with a 50 cent part from Radio Shack. Don't have the part number at hand but if you search the...
It depends on how long you're planning on keeping it. It will be much harder to sell down the line because of gear whine. Just my opinion. New Holland, when they bought mine back said it was $4500 fix to reduce gear noise. BUT they have. Seen them get louder after the so-called fix too. That's...
Far as I know it is only the 180 line. I know guys with 170's and 665's (same basic machine) that are very quiet all around BUT they're. Not in the same class as an 180 either.
As far as what New Holland told me, the drive pumps sit side by side on the front of the flywheel housing. The flywheel has internal teeth set on the inside perimter of the flywheel. These are straight-cut gears which are noisey to begin with. The noise comes from the chatter of the pump gears...