Posted by RodInNS on January 31, 2014 at 15:08:46 from (216.118.158.123):
In Reply to: CVT transmissions? posted by wile E on January 31, 2014 at 02:32:53:
I'm not really sure how the Steyr/CNH variable drive works... but the Fendt version is a hydro mechanical type of system that uses a type of hydro for the starting and light maneuvering type of stuff and then uses a variable drive system I think using a steel belt and sheaves or some similar idea. Regardless of how it's achieved, it is a very efficient, reliable system. Those tractors are pushing close to 400 hp today and I don't here about too many problems with them. Lots of guys are using them for hauling the large manure tanks because they're safer to work with then large 4WD tractors... From what I understand, the Deere IVT system is good but not quite as reliable as the Fendt. Massey uses the same basic componentry as Fendt with a different user interface... The big gain with the CVT transmission is that on lighter or varying loads it represents the opportunity to throttle back and still maintain appropriate ground AND PTO speeds so you can save a fairly substantial amount of fuel. On a dead pull such as heavy tillage.... no, it's probably not as effective or efficient as a power shift or gear drive.
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