Search found 6 matches

by smog
Thu Jul 19, 2007 11:28 am
Forum: CVT Info
Topic: CVT on the cheap : Lawn tractor hydrostatic pump/motor unit
Replies: 19
Views: 28334

You're in Canada eh? East or West? I'm near Cornwall ON. Avery 2 hours east; I live close to St-Sauveur in Quebec. I works on VW TDIs since 2000; selling high performance parts for them and importing some yanmar clones; also I may get a batch of Punsun aircooled vtwin for my various projects (resel...
by smog
Wed Jul 18, 2007 11:41 am
Forum: CVT Info
Topic: CVT on the cheap : Lawn tractor hydrostatic pump/motor unit
Replies: 19
Views: 28334

How much horsepower/torque can these CVTs handle? Regarding controls and engine shutdown or hydraulic failure. One solution that would also please control freaks would be to incorporate traditional throttle and clutch controls. The clutch lever would operate a bypass valve. When coming to a full st...
by smog
Tue Jul 17, 2007 7:31 pm
Forum: CVT Info
Topic: CVT on the cheap : Lawn tractor hydrostatic pump/motor unit
Replies: 19
Views: 28334

Maybe some sort of one-way slipper clutch could be the answer. Let off the gas or have a hydraulic failure and she free-wheels? or something to release pressure on the hydraulic motor (most pump/motor unit got that type of valve to allow the lawn tractor to be hand pushed with the engine shut down....
by smog
Tue Jul 17, 2007 7:09 pm
Forum: CVT Info
Topic: CVT on the cheap : Lawn tractor hydrostatic pump/motor unit
Replies: 19
Views: 28334

Maybe some sort of one-way slipper clutch could be the answer. Let off the gas or have a hydraulic failure and she free-wheels? or something to release pressure on the hydraulic motor (most pump/motor unit got that type of valve to allow the lawn tractor to be hand pushed with the engine shut down....
by smog
Tue Jul 17, 2007 2:44 pm
Forum: CVT Info
Topic: CVT on the cheap : Lawn tractor hydrostatic pump/motor unit
Replies: 19
Views: 28334

The biggest concern I see is engine shutdown or hydraulic failure. That woud stop the hydraulic flow instantly therfore locking the rear wheel up. yup that's real hydraulic brakes !!!!! even shutting off the trottle handle (if linked to the displacement linkage on the hydro pump) can make the bike ...
by smog
Tue Jul 17, 2007 12:31 pm
Forum: CVT Info
Topic: CVT on the cheap : Lawn tractor hydrostatic pump/motor unit
Replies: 19
Views: 28334

CVT on the cheap : Lawn tractor hydrostatic pump/motor unit

I need your ideas and views on this : older garden tractors used to have horizontal shaft engines driving hydrostatic transmisions with a simple v-belt. You can remove the variable displacement pump/motor unit from the differential axle assembly. we can easily fit a sprocket on the hydro motor outpu...