Re: How To Operate a T/A

Posted by K.B.-826 on November 14, 2006 at 19:28:44 from (68.115.91.164):

In Reply to: How To Operate a T/A posted by City-Boy McCoy on November 14, 2006 at 18:06:33:

There are two types of TA's. The mechanical TA is used in the tractors with the 5-speed transmission, from the Super MTA all of the way up to the 686 which was last built in 1981. The hydraulic TA is used in the tractors with the 3 or 4 speed/high-low-reverse range transmission, from the 706 all of the way up to the 6788. On all tractors, when the lever is ahead, you are in direct drive. When the lever is pulled back, you are in TA. With any TA-equipped tractor, the main engine clutch is in no way used while shifting the TA. That is the main point of the TA- to change speed or increase pulling power without declutching/stopping or otherwise interupting the flow of power from the engine to the wheels. Just grab the lever and shift. With both TA's, I think it is best to move the lever as fast as you possibly can, to avoid slippage. With any TA, proper linkage adjustment goes a long way towards how long the unit will last. Adjustments are very critical and must be followed to the letter. Changing the transmission fluid at the specified interval is also very important, especially with the hydraulic TA. Remember, the mechanical TA will provide no engine braking when the lever is back (in the TA position). This means that the tractor will freewheel downhill. If this should ever happen to you, try your best to bring the tractor to a stop with the brakes. If you gain too much speed freewheeling and throw the lever ahead into the direct drive position, the unit will self-destruct. With the hydraulic TA, a brake pack is used to keep the tractor from freewheeling in the TA position. If you try to use the hydraulic TA as an engine brake, such as flying in off of the road with a loaded wagon and pulling the TA lever back to slow down, you will fry the brake pack. Another common misunderstanding is that the TA will last forever if you never use it. This is not true, since flat spots will wear into the overrunning clutch rollers if you do so, then it will slip in the TA position if someone decides they want to use it. Use it or lose it.

Replies:

• Re: How To Operate a T/A Dr.EVIL 09:30:02 11/15/06 (0)
• Re: How To Operate a T/A City-Boy McCoy 20:17:08 11/14/06 (0)

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