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Shift starter -- hows and whys

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motorv8N

11-05-2007 19:39:44

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Can anyone explain how the shift starter is supposed to work on a 51 TEA 20? Or direct me to some photos of the various components?

The tractor I'm looking at has been converted to key start ignition and it gives me the willies to think of not having any kind of safety interlock. The problem is I don't even begin to know where to start looking to see what remains of the original system. Presumably the guts of the switch is under the transmission top?
Is the tractor in neutral by virtue of where the shifter must be placed to engage the starter? And was there a key of any sort then with the original setup?

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Jeff-oh

11-06-2007 12:07:21

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Re: Shift starter -- hows and whys in reply to motorv8N, 11-05-2007 19:39:44

Here is a picture of the switch being removed. The rope is on the shifter rod that is attached to the starter switch cam lever. When you remove a switch you want to put a good string on the lever so it does not fall into the never never land on the case. To remove and replace the switch you pull the pin that attaches the switch to the cam lever.

Jeff

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Jeff-oh

11-06-2007 12:05:29

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Re: Shift starter -- hows and whys in reply to motorv8N, 11-05-2007 19:39:44

Jeff

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motorv8N

11-06-2007 09:22:36

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Re: Shift starter -- hows and whys in reply to motorv8N, 11-05-2007 19:39:44

Ok, I'm beginning to get it -- so all the electrical contacts are forward of the steering column under the battery and there is just a rod of some kind connected to the shifter running underneath inside the transmission case?

It's probably the switch contacts then that go bad, not the shifter linkage?

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Jeff-oh

11-06-2007 12:02:56

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Re: Shift starter -- hows and whys in reply to motorv8N, 11-06-2007 09:22:36

The starter safety switch is located on the top center of the case just behind the engine and under the battery tray. Internal to the trans. case there is a rod that runs from the shifter to a cam lever on the bottom of the switch.

as the shift lever is pushed forward this cam is rotated to press a button on the starter safety switch and make contact to run the starter.

Thus you cannot start the tractor in gear. Harry's geneous again.

The key is a theft devise as the coil will not charge or fire unless the key is in the on position. You can power and turn the starter with out the key in the on. It is always fun when your at a show and you are cranking and cranking away and your tractor will not start.... Just don't tell anyone you forgot to turn the key to the on position.

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Jeff-oh

11-06-2007 06:30:44

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Re: Shift starter -- hows and whys in reply to motorv8N, 11-05-2007 19:39:44

Here is a picture of the orgional TE20 switch. Though it was updated to the servisible switch shown below.

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Bob (Aust)

11-05-2007 20:54:09

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Re: Shift starter -- hows and whys in reply to motorv8N, 11-05-2007 19:39:44

The TEA20 gear lever activated switch is located in the top of the bell housing, beneath the battery, in the center of this photo:

third party image

The switch can be disassembled to clean the contacts and is adjustable forwards and backwards.

READ THE MANUAL BEFORE YOU REMOVE THE SWITCH OR THE CONNECTING ROD MAY FALLDOWN INTO THE CLUTCH HOUSING.

It was a sefety feature to negate the possibility of the tractor being started in gear.

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Dick N.Y.

11-05-2007 19:50:48

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Re: Shift starter -- hows and whys in reply to motorv8N, 11-05-2007 19:39:44

When the system was original , all you did was turn the key on and push the shifter to the right and forward into the S position . When it started you let up on the shifter . I believe that parts are available to repair it . I like it .

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