Posted by Texasmark1 on January 01, 2017 at 18:53:47 from (198.45.240.17):
Working on a 13 hp Honda engined, 2wd, single 2 person seat, American ....forget the next word of the brand name.....Trail Wagon. Question is about the Continuously Variable Transmission connecting the engine to the differential/tranny.
Complaint was "seems to be slipping". Not a lot of hours on this adult driven machine,
I removed the covers and saw that the belt and the sheaves were slick so I cleaned them up. On the belt I took 220 grit and rubbed the glaze off the sides and shot it with some belt dressing. Belt now looks new. Acceleration from ⅓ throttle is superb....hang on. Don't figure I have a bad belt if I can do that now. While the covers were off I watched the drive clutch manipulate the drive sheaves from wide apart at idle to WOT and it was all a seamless process.
If the idle rpms are set too high, you can't shift into gear. Slowing down to the recommended 1400 allows the drive clutch to back off the belt and (with it flopping) the tranny can be shifted (FNR), and the engine NOW holds a good solid idle and accepts throttle; got that part all ironed out.
So my thinking is that since the belt can't be in contact with the sheave sides at idle, it has to be loose......and here's the question: Therefore when you accelerate, you have to wait for the sheave to close onto the belt providing enough tension for it to transmit power to the rears. If you press down on the accelerator they close too fast and when making contact you get a good jerk. If you just touch the accelerator you have to wait maybe 15 seconds for the belt to be picked up.
This makes for a sloppy, clumsy start. Once the vehicle is moving throttle movements up and down produce smooth responses.
Is this how they operate on this type machine? ------------------------ I have zero experience with these types of drives but after Wikipedia and several UTube demonstrations I am duly impressed with the design. The designer was good at what he does and it certainly fits the application. Problem with all those examples, the applications were other types of vehicles so I didn't know if the UTV system might be different. The ones I saw seemed to hold the belt tighter at idle, not loose on the drive end which would make for a smoother take-up and start off.
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