diesel red neck said:
is their any aftermarket add on's to get more power out of the engine and the FEL. I bought a computer tuner for my diesel truck that adds 225 hp & its getting 1.5 -2.0 mpg better than stock. can these tractors be tuned like this. BTW its a 05 tc35 da.. thanks in advance
No is the answer. Now, I'll give you the reasons. If you raise your engine hp to 50, you will gain nothing at the wheels. The PTO will have more power, but the FEL will be exactly the same.
Both the HST transmission and the hydraulics on your tractor are "governed" by relief valves. The HST relief valve is the same for all the Class IIIs. Your TC35 has the same transmission relief valve as the TC40DA and TC45DA. When the transmission develops 5000 psi, it goes into relief...period...end of story.
The main hydraulic system for the 3PH and FEL is adjustable. It has a relief valve on the right side underneath the operator's platform. It's a square block with several lines going into and out of it. It's called a "diverter valve" and is used to divert fluid to the FEL if one is installed. It also contains the system relief that sets the power to the 3PH and FEL. That relief on your tractor is 2350 psi. On the TC40 and TC45 tractors, the relief pressure is set to 2500 psi, and that's why they can lift more at the 3PH and FEL than you can.
Can you change the pressure so that your hydraulic system has a higher pressure? Sure you can. Your NH dealer has a shim kit to do just that. By adding shims to the relief valve, you can increase the pressure to 2500 psi and maybe even higher. I strongly don't recommend doing this until all your warranty is gone. Since you have an '05, I'd say the warranty is expired and if you blow the hydraulics up now, all you'll get is wet and wiser. As you can tell, I'm not a fan of doing this (going higher than 2500 psi, that is). I have a TC45D and I've checked my pressure. It's 2500 psi and that's where it is going to stay for as long as I own my tractor.
So, I'd recommend not messing with the engine, but if you want to carefully raise your hydraulic pressure to just 2500 psi, you will probably get away with it. I strongly don't recommend going any higher than that.