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1988 Craftsman GT6000 (Caterpillar) repower has begun


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#1 wvbuzzmaster OFFLINE  

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Posted April 18, 2015 - 07:47 PM

As the title says, I yanked the 18 hp Briggs opposed twin off of the Caterpillar which is a 1988 Craftsman Gt6000. I started the painful process of re-engineering the belt drive / clutch system today. I am doing two things most sane people, especially GT nuts don't normally do to a 1988 Craftsman... 1) repowering it instead of something more interesting lol... 2) turning the new engine 90 degrees!

I took zero pictures of the work so far, as it has been a tedious project so far. I started with what I thought would be the worst part, cleaning up a rusty pulley. I can not use the OEM drive pulley so located in my stock of parts a taper lock two groove A/B pulley about 1/2" bigger than stock that would fit the 13 hp Predator shaft perfectly and being an A or B compatible pulley it means that when using the 1/2" drive belt it has more groove to remain in when the clutch is pressed. Anyway, cleaning and painting the pulley took around 1.5 hours.

Then came the weird thing, I started the Caterpillar and drove it to its new parking space for repower, ya, seems strange to me that it started too. Lol
Pulling the engine took around 1/2 hour. At that point I set the Predator in place and stuck the pulley on the shaft to see what I could do with the belt.

This is where the next 3 hours went by as I ended up removing every pulley between the engine and transmission to determine how to run the belt like an old Sears. I ended with an hour of successful engineering and have a plan, but no shorter belts. I only have to make a half a dozen different spacers for things, but the clutch tensioning pulley is mounted to a box tube bolted over the tang of the clutch pedal shaft. I have about half a day to work on it tomorrow before I have to leave, so it may not be running tomorrow, but I will be calculating a new belt length and making a parts list.

How long is the older Sears drive belt?

Edited by wvbuzzmaster, April 18, 2015 - 07:47 PM.

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#2 Alc ONLINE  

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Posted April 18, 2015 - 09:29 PM

Casey do you have a old belt that's too long and cut it to the length that will work then measure it ?
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#3 wvbuzzmaster OFFLINE  

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Posted April 18, 2015 - 10:47 PM

No other comments, or are you all holding out for pictures?

#4 MH81 ONLINE  

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Posted April 18, 2015 - 11:39 PM

Pics.



Actually, there are several belts, but I thnktheone you mean is 82ish
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#5 toppop52 ONLINE  

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Posted April 19, 2015 - 08:10 AM

I need pictures, I'm like a cat, no matter what you say I only hear, bla bla bla... :D


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#6 Cat385B ONLINE  

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Posted April 19, 2015 - 09:16 AM

No other comments, or are you all holding out for pictures?

 

This is somewhere around the third thread about this, and still no :camera:

 

Did your camera charging cord get left in a NJ hotel room? Who do you think you are?



#7 wvbuzzmaster OFFLINE  

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Posted April 19, 2015 - 09:19 AM

Cat has 7,999 thanks, let's boycott him now. :D

#8 Cat385B ONLINE  

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Posted April 19, 2015 - 09:21 AM

Cat has 7,999 thanks, let's boycott him now. :D

 

 

I need pictures, I'm like a cat, no matter what you say I only hear, bla bla bla... :D

 

Another post without a pic.  blah blah blah blah blah blah blah


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#9 wvbuzzmaster OFFLINE  

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Posted April 19, 2015 - 09:25 AM

I had issues google couldn't even solve, so there were not any picture worthy stages yesterday lol.

 

(again no pics, blah blah blah)


Edited by Cat385B, April 19, 2015 - 09:37 AM.
added necessary info


#10 wvbuzzmaster OFFLINE  

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Posted April 19, 2015 - 01:32 PM

ImageUploadedByTapatalk1429468167.108927.jpg
ImageUploadedByTapatalk1429468204.572723.jpg
ImageUploadedByTapatalk1429468228.793255.jpg
ImageUploadedByTapatalk1429468250.292342.jpg
ImageUploadedByTapatalk1429468284.340897.jpg
ImageUploadedByTapatalk1429468304.840812.jpg
ImageUploadedByTapatalk1429468325.706050.jpg
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#11 DH1 OFFLINE  

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Posted April 19, 2015 - 02:07 PM

Looking good Casey, making some progress.

Was the original engine mounted the same way?

 

GREAT PICTURES    :thumbs:  :thumbs:  :thumbs: :thumbs:  :thumbs:  



#12 wvbuzzmaster OFFLINE  

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Posted April 19, 2015 - 05:10 PM

No it wasn't Doug. The old motor was mounted 90 degrees and the belt was on the front of the engine and folded under and twisted up through clutch pulleys to go to the transmission.

Edited by wvbuzzmaster, April 19, 2015 - 05:11 PM.

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#13 wvbuzzmaster OFFLINE  

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Posted April 19, 2015 - 10:07 PM

So everyone has looked at the pictures, and see I need some help. Allow me to lay out the rough spots.

Exhaust: I have an issue with exhaust aimed dead between the head light holes. I have an alternator to go below the exhaust, so routing it down is out, but if I can get it out the headlight hole somehow that would be great, any thoughts?

Engine elevation: In the pictures it is sitting on 1/2" of blocking. I had it on 1" yesterday and liked that better, but I need to block it up in steel.... But don't want to add a ton, but it does need to be a good solid connection. I have 1"x1" steel box tubing and was thinking today of using it down the tops of the frame rails to raise the entire engine plate 1 inch, and possibly running the pieces long to tie into the insides of the frame. There are 3 bolts down each side of the engine plate (6 total) holding it to the frame rails. Opinions?

Engine left to right: In the pictures my pulley on the engine is not secured yet, wedge connection type, but close to final position. I want to be in the outter groove, as that adds options to drive and position the alternator later. My air filter almost touches the hood hinge. Should I modify air filter setup? Or just deal with it?

Throttle and choke: How do I hook up those to this engine?

Hour meter: I have one, where do I tap in to the engine to run it?

#14 Cvans OFFLINE  

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Posted April 19, 2015 - 10:21 PM

I wish I could help but without being there in person to see,  this simple minded one can't do it.  :(


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#15 MH81 ONLINE  

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Posted April 19, 2015 - 11:54 PM

Glad to see progress. looking good Casey
Elevation: I would do what your thinking, but consider spacers on the end holes inside the tubes
Air filter: I'd leave it unless it will rattle.
Choke: should be just a bracket to hold the cable?
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