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Shaw Du-All -2


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#1 jdcrawler OFFLINE  

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Posted September 04, 2011 - 04:41 PM

I started tearing the Shaw tractor down last week.
The engine, steering column and seat are removed.
In this photo you can see that the transmission is rotated towards the back of the tractor.
The shifter handle has been bent forward. It originally pointed backward also.
This was so it could be shifted by the operator walking behind it when it was just a two wheel garden tractor.

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The frame is set up on blocks and the front axle and rear wheels are removed.

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The rear axle shaft, bull gear and gear housing are also removed.

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Whoever originally made this into a four wheel tractor, mounted the seat way out behind the rear wheels because of the location of the transmission.
The first change I'm going to make in the design of this tractor is to re-locate the shifter on the transmission.
I can't just rotate the whole gear housing because it has a flange cast on it that bolts to the underside of the frame.

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The transmission is mounted to the side of the gear housing by four bolts.

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I was hoping to be able to just unbolt the transmission and rotate it forward but nothing is ever that easy.
When I rotated the transmission, the bottom of the transmission hit the top of the frame rail.
So I cut a clearance notch in the frame.

Now the transmission will almost rotate far enough.
One of the two bosses for the shifter rods hits the top of the gear housing.
I ground a half round clearance notch in the top of the gear housing just in front of the square transmission mounting flange.

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The transmission and gear housing are re-mounted and the top of the transmission now rotates forward.
The shifter handle was heated and re-bent up.
Now the seat can be mounted up over the axle.

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Here you can see where the boss for the shifter rod sets down into the clearance notch on top of the gear housing.

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On the original two wheel garden tractor, the drive end of the transmission was supported by a rod sticking up from the frame and the enclosed belt housing mounted to the end of the transmission and the side of the engine block to keep the transmission from moving forward when the drive belt was tightened.
The transmission was still supported by the rod sticking up from the frame but the belt housing had been cut in two so there was no forward support left.
( you can see the support rod and belt housing if you go back to the second photo of the frame on the blocks )

The input shaft on this end of the transmission is mounted off center so with the transmission rotated forward, the housing no longer lines up over the support rod from the frame.
This is what the end of the transmission looks like without any support.

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I made up an angle bracket to provide support up under the transmission housing.
This has a U-bolt that goes over the top of the housing to keep the end of the transmission from moving forward or backward.

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The rear wheel hubs are held on the axle shaft by a steel locking ring with two set screws in each ring.
The set screws just tighten down on the axle shaft.
Both locking rings had slipped out along the axle shaft so that there was about 1/2 inch side movement in the axle shaft and one of the locking rings was about to slip off the end of the shaft.

I drilled two countersunk holes on each end of the axle shaft.

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The set screws in the locking rings tighten down into the countersunk holes to keep the rings form moving sideways.

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Next on the list was to re-mount the brakes.

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#2 Bill56 OFFLINE  

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Posted September 04, 2011 - 08:30 PM

Looks like a great, fun project!!! Thank you for sharing the photos.
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#3 wilberj ONLINE  

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Posted September 04, 2011 - 09:04 PM

Off to a good start Ray, I bet it will work and look alot better when your done then when I seen it at Buckley.
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#4 caseguy OFFLINE  

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Posted September 05, 2011 - 10:03 AM

Looking great as always Ray! Thanks for the detailed pics and commentary! We'll be following this one closely!!
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#5 gimmodog OFFLINE  

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Posted September 08, 2011 - 12:17 PM

I want to see a photo of an original 2 wheel version, really looking forward to seeing your finished photos.
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#6 jdcrawler OFFLINE  

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Posted September 08, 2011 - 12:38 PM

I want to see a photo of an original 2 wheel version

Here you go . ......

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#7 KennyP ONLINE  

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Posted September 08, 2011 - 05:17 PM

Wouldn't want to run over your foot with that sucker. OUCH! Thanks, Ray.
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#8 MH81 ONLINE  

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Posted August 28, 2016 - 08:39 AM

Next phase of project can be found here
http://gardentractor...-shaw-du-all-3/




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