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Tough to find Briggs engine/repair.


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#1 classic ONLINE  

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Posted October 25, 2015 - 06:06 PM

I'm getting ready to assemble the engine for my Gard'n Mast'r model JS tractor. The engine ran, but was completely worn out. I've never seen a cam in one of these Briggs engines worn so badly. My plans were to replace everything but the bare block and the gear reduction unit. I just found a complete Briggs with the same gear reduction unit, but the engine is a later replacement (1970) and has a different ignition and crank case vent. This engine is a model 233461, type 0040-01. The engine has very little wear internally, and the crankshaft rod journal measures as new. When I removed the gear reduction unit, the bronze thrust washer was loose on the brass pins that retain the washer to the gear reduction cover. I can't find a parts diagram of this gear reduction unit, so I had to make new brass pins to secure the thrust washer. The old pins drilled out easily in the drill press, and I made the new pins longer than the originals, and filed them down after driving them into the cover. I left them sticking up just above the washer, then hammered them flat. I gave them a shot with a center punch to expand the brass a bit. The original oil seal for the gear reduction cover is a National seal, number 50157. The replacement seal for the gear reduction cover is National seal number 450157. Both seals are 1.000x2.000x.437. The old gear reduction cover gasket measures .0125 compressed, so I made a new gasket out of .015 gasket material. This gear reduction unit will go on my original block for the rebuild. I will rebuild the old gear reduction unit and keep it with the crankshaft, ignition, and flywheel from the Briggs 233461 engine. I can use these for a Briggs model 23 rebuild for the Gard'n Mast'r parts tractor that I picked up. If anyone has a parts list with part numbers for these cast iron gear reduction units, please contact me or post the info.

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Edited by classic, October 25, 2015 - 06:20 PM.

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#2 KennyP ONLINE  

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Posted October 25, 2015 - 06:19 PM

We have a B&S here with the Auxiliary drive on it. Haven't seen anything about it either. It's a 190492 Series.

 

Just found this manual!


Edited by KennyP, October 25, 2015 - 06:22 PM.

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#3 classic ONLINE  

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Posted October 25, 2015 - 06:25 PM

Kenny, does it have the aluminum gear reduction unit on it? All of the schematics that I see of the Briggs 14, 19, and 23 series engines show the aluminum gear reduction unit.

#4 GWest OFFLINE  

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Posted October 25, 2015 - 06:30 PM

You have seen this one?

http://www.briggsand...TT=233461-0040*

 

Garry


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#5 KennyP ONLINE  

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Posted October 25, 2015 - 06:33 PM

Kenny, does it have the aluminum gear reduction unit on it? All of the schematics that I see of the Briggs 14, 19, and 23 series engines show the aluminum gear reduction unit.

It's aluminum, but just an aux. drive, parallel to the crankshaft. Not gear reduction.


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#6 KennyP ONLINE  

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Posted October 25, 2015 - 06:52 PM

This is what the Auxiliary drive looks like.

2015-10-25 18.44.57.jpg     2015-10-25 18.45.09.jpg



#7 classic ONLINE  

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Posted October 25, 2015 - 06:56 PM

I did read about one of those engines, Kenny. I saw a pic of one on a mower, also. I think it was on a small mower.
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#8 classic ONLINE  

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Posted October 25, 2015 - 07:01 PM

Thanks Gary, it appears that the part numbers for the cast iron gear reduction unit are there, but the illustration shows the one with the aluminum housing.

#9 karl OFFLINE  

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Posted October 26, 2015 - 04:40 AM

I have an aluminum gear reductuion unit.its a whole different animal.


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#10 Bruce Dorsi ONLINE  

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Posted October 26, 2015 - 05:53 AM

We have a B&S here with the Auxiliary drive on it. Haven't seen anything about it either. It's a 190492 Series.

 

 

 

 

A Parts List for your engine can be found at:

http://gardentractor...0400-to-190499/

 

Your 8hp B&S Model 190492 decodes as:

 

190492 = 19 cubic inches

190492 = Basic Design Series

190492 = Horizontal crankshaft

190492 = Plain bearing, Aux. drive parallel to crankshaft

190492 = Recoil starter

 

If you look at the Parts List, you will see that ref # 18 is for the crankcase cover.  ....There are 7 different part numbers for the various covers, but for your engine, it uses the # 391280 Crankcase cover assy.

 

There are only two camshafts listed (ref # 46).  ....If you check the TYPE number of your engine, it should fall under the note for the # 211862 Cam.

 

Since the Aux. drive is actually an extended camshaft, it turns at one-half of the crankshaft rpm's, and it rotates in the opposite direction of the crankshaft.

...Looking at the ends of the shafts, the crankshaft rotates counter-clockwise while the aux drive turns clockwise.

 

This type of engine was often used on tillers to get a reverse, but they were also used on some snowblowers and other types of equipment.


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#11 KennyP ONLINE  

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Posted October 26, 2015 - 06:04 AM

It would be nice to see a parts break down of what it looks like inside there, but they don't show any of that in there. The Type is 164301. I'll learn how B&S lists their parts, just used to how Kohler does it. Thanks Bruce!

 

What is odd is this engine code is 78112810, built Nov. 28, '78. The other B&S I wrote #'s down for (190402, type 151501, code 78092912) was made just 2 months earlier. We have one more of these, but the flywheel shroud is missing.


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#12 Bruce Dorsi ONLINE  

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Posted October 26, 2015 - 07:04 AM

It would be nice to see a parts break down of what it looks like inside there, but they don't show any of that in there. The Type is 164301. I'll learn how B&S lists their parts, just used to how Kohler does it. Thanks Bruce!

 

What is odd is this engine code is 78112810, built Nov. 28, '78. The other B&S I wrote #'s down for (190402, type 151501, code 78092912) Note: This engine does not have the aux drive, if it does, the shroud has been changed. was made just 2 months earlier. We have one more of these, but the flywheel shroud is missing.

 

The Parts List linked above is dated January, 1983, but it does not cover your Type # 1643-01.  

 

I just uploaded a different Parts List at: http://gardentractor...ted-march-1983/ which covers additional Type numbers.

 

The crankcase cover for your engine is # 391280, but the cam is # 211689.

 

As far as not seeing "what it looks like inside there," there is nothing to see.  .....It looks just like the illustrations depict, except the camshaft is made with a longer end that protrudes through the crankcase cover.  .....The cover has an extra boss to support the end of the cam, just like it has for the crankshaft.  ....The outside of the cover is counter-bored to accept an oil seal for the extended camshaft, just as it's counter-bored for the crankshaft seal. 


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