Good to know. The dealer said it’s important to watch and make sure the stroke limiter is set properly so the pump turns off at top of stroke. If not, the pump could over heat.
It will overheat because it will be dumping across the relief valve. It only becomes an issue when the reservoir temp goes over 140degF. Anything up to 130degF in the reservoir is normal and 110degF to 120degF is actually the ideal range for a hydraulic system. It's easy to check with an IR temp gun. Just shoot the tank near the return line. The pump will always run hotter, just the nature of the beast since it's trying to compress the fluid and pump it out against resistance. Hydraulic pumps have to send the flow somewhere... it either goes down the line, across the relief back into the tank; or in bad situations, onto the floor.
Once the stroke limiter is set and you release the foot pedal as soon as the metal shears, you should be fine.
The other issue my customer had was that they never sharpened the shear blade in over 20 years! It had worn down significantly so it wouldn't shear thick stock. It would just groove it and dump across the relief. So in a few years if you hear the unit straining to cut the stock it used to cut just fine, pull the blade and sharpen it. It doesn't get sharpened to knife sharp, but it needs a decent edge so it can cause the stress fractures to occur in the steel so it shears. You'll see the issue first on thicker and wider stock. Thin or narrow stock will cut fine, but the wide or thick stuff will not shear.