Your pulley looks visibly smaller. They may be using the smallest pulley possible to maintain a certain RPM at idle. Maybe the 24V is more sensitive to that. It will be interesting to see what they say.
Yes thanks. I understood this to be the case. Sorry if I gave you the impression I thought my alternator was going to assist my engine or something along those lines. Understood that the goal is to reduce wear on the belt by allowing coasting.If i'm reading the photos correctly, your green belt is (properly) coming from a second pulley sheave on the crankshaft.
The "sprag clutch" is to allow the alternator(s) to *continue to coast* when the engine slows down abruptly.
It does not affect "push back" (which i translate as "resistance to forward motion").
By allowing the alternator to coast, it's not reversing the direction of "power flow" that the belt is carrying.
(switching from "engine pulling alternator" to "alternator pushing belt to try to get the engine to go faster")
Many of the "wrap angles" and tensioner designs are not really prepared for that reversal.
For a dedicated belt like the Nations', it's probably OK. (versus the "powers everything" serpentine)
p.s. although i'm an electrical engineer, i'm well aware of the mechanical engineers' credo of "F=M*A" and "you can't push a string"
Mark - is your van really a 2021 model or a 2020. Several threads on this forum indicate the V-6 diesel and 4X4 are not yet available on the 2021 models. Searching various dealer inventories in my area - I could find no 2021 models, only 2020.Hi all,
2021 Sprinter 3500XD 4x4 170" wheel base with MBUX package. Rear of the van is an empty metal box without anything in it. We're turning it into a film truck. . . . . The vehicle is brand new and we only received it a few days ago, so I'm sure we'll have much more data as the week progresses.