There is a pressure releif adjustment on the SCV valve.
The pump will only be able to produce a certain maximum pressure and the other components of the system will only be rated for some pressure as well, but most hydraulic parts these days are rated for at least 2000 psi.
If the valve is indeed only set for 1600 psi from the factory, I could get up to 25% more pressure. Since some portion of the existing hydraulic force is used just lifting the FEL arms and bucket, the increase in payload would by more than the 25%.
Of course this comes at a cost:
1. The higher pressure will likely wear things out faster. Especially the pump, the lift cylinder seals, and the scv valve.
2. The increased force will likely also stress and/or wear the FEL mechanism out faster. Perhaps bending something that wouldn't otherwise bend.
3. The increased payload will make the tractor even more unstable, so the rear ballast will need to be increased and safety will be decreased. Becase the bucket is wider than than the tractor, uneven loading (like a corner bucket tooth snagging a root while digging) could also tip the tractor sideways. Since my wheels are already at maximum width, not something thaqt can easily be compensated for.
4. The increased total weight of tractor, ballast, and payload will put more stress on the drivetrain, axles, and frame of the machine. Likely wearing things out faster or perhaps bending or breaking something.
So, if I do this, I will bre prepared to be replacing the wear-out things more often and being even more careful about ballast, stability, and tipping.
- Rick