If it was an open center system like on the old tractors of old days or newer small tractors holding the pressure beyond the time it is needed would cause undue wear and heat in the system, because with constant flow the relief valve has to "blow" all during the excess time the lever is held. With modern closed center load compensated systems it is really not much of an issue. Once the cylinder reaches the end of the stroke although high pressure is maintained the pump de-strokes and there is no flow within the internal system so only a tiny amount of power is required to maintain the high pressure for the extra few seconds. In fact more and more of the implements are requiring the tractor hydraulic to stay on constantly and they let the implement control the functions. Tractors of today are made with this type use in mind. You do not need to worry about it.

Being able to do a different time for raise and retract would be nice some times. I guess Fendt has the edge there.

One advantage to having the time set a second or two too long is that re-phasing implements are re-phased at every cycle that way. With the old pressure detent systems you had to remember to manually hold the lever to re-phase an implement once in a while. I used to have problems with new employees forgetting to re-phase a few times a day or after folding/unfolding implements and the field cultivator or disc by the end of the day was running uneven depths across it. That is not a problem with the timed detents because of their inherent re-phassing automatically at each cycle by holding the pressure a little longer than needed.

Timed detents are definitely a big improvement over the pressure release detents. The pressure release worked great in the olden days when not so much pressure was needed to raise implements. Seems like today all the implements need so close to maximum pressure to raise them it is very hard to get the detents set strong enough to raise the implement but not stick on full time. We usually ended up just having to hold the lever till the implement was fully raised, which is a pain in the butt. Glad we have gotten rid of most of the pressure detent tractors. Still have a couple smaller ones around.

John