Re: Question for Hugh (and others) on TA

Posted by Allan In NE on October 22, 2006 at 08:47:14 from (148.78.243.26):

In Reply to: Re: Question for Hugh (and others) on TA posted by TomH in PA on October 22, 2006 at 07:19:20:

Tom,

Both styles drive the low side thru that sprague and both "overrun" the sprague on the high side. Normal operation; doesn't hurt that sprague a bit.

Small style tractors use a planetary type reduction unit incorporating a conventional type "T/A clutch" to lock the driving members of the planetary up solid, to turn as one unit, which produces direct drive. When this T/A clutch is released, power flow is then thru the planetary giving a reduction and increased torque.

Large style tractors use a hydraulically actuated lever to switch between either a direct (straight thru) drive or a gear reduced constant mesh setup and they also incorporate a double hydraulic clutch(s) setup to prevent the freewheeling. These hydraulic clutch packs don't transmit power; merely hold the tractor back on de-acceleration.

Tractor is actually directly gear driven via the main clutch in both modes and in both styles of T/As.

Hope I got all that right. :>(

Allan

Replies:

• Re: Question for Hugh (and others) on TA TomH in PA 10:33:15 10/22/06 (0)

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