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Rd4 Starter Pinion

Rd4 Starter Pinion

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RABBIT2
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RABBIT2
I'am working on a 1937 RD4 caterpillar (s/n 4g4344) I have a question that I'am sure has been ask and answered befor. I've looked back as far as the last year for a previous discussion on this subject and have not found one so I'am going to ask because I have a problem and need some help. How do you release the starter pinion once it is "engaged" without the motor running? I did a very stupid thing (I'am sure I'am not the first one to ever do this)< while trying to check the starter clutch adjustment I messed up and engaged the starter pinion and now do not know how to "unengage " it. Any help will be most appreciated.
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Thu, Oct 23, 2008 10:14 AM
bernie
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I am not sure this is the proper way. I had the same thing happen with my D42T shortly after I purchased it due to poor methodology on the procedure.

I ended up pull starting it to engage the main and the pinion disengaged once the RPM got to the release point...I am pretty sure that is the least desirable method.

On my 2T there is a tiny tiny tiny hole in the cover. Supposedly one can reach the latches on the sleeve and release it manually. If you have a parts manual, that will likely be a big help so you can see what you are looking for. That is for my 1945 2T...

bernie
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Thu, Oct 23, 2008 5:50 PM
8C 361
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Reply to bernie:
I am not sure this is the proper way. I had the same thing happen with my D42T shortly after I purchased it due to poor methodology on the procedure.

I ended up pull starting it to engage the main and the pinion disengaged once the RPM got to the release point...I am pretty sure that is the least desirable method.

On my 2T there is a tiny tiny tiny hole in the cover. Supposedly one can reach the latches on the sleeve and release it manually. If you have a parts manual, that will likely be a big help so you can see what you are looking for. That is for my 1945 2T...

bernie
I went and looked at an RD4 I have sitting in the yard. There is a decent size access cover over the starter pinion. You will need to remove the front floor plate to get to it. You may need to turn the pony to position the latches so you can get at them. They are geared together so if you can pry or tap on one to release it the pinion should pop back out of gear.

Tom
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Thu, Oct 23, 2008 11:52 PM
SJ
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Reply to 8C 361:
I went and looked at an RD4 I have sitting in the yard. There is a decent size access cover over the starter pinion. You will need to remove the front floor plate to get to it. You may need to turn the pony to position the latches so you can get at them. They are geared together so if you can pry or tap on one to release it the pinion should pop back out of gear.

Tom
If the clutch on the starting engine is released then there is no worries as it will kick out on it,s own the same as if the starting engine was running and the diesel starts and it kicks out. Again make sure the clutch is released if you go this route so the starting engine doesn,t turn.
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Fri, Oct 24, 2008 1:53 AM
bernie
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Reply to SJ:
If the clutch on the starting engine is released then there is no worries as it will kick out on it,s own the same as if the starting engine was running and the diesel starts and it kicks out. Again make sure the clutch is released if you go this route so the starting engine doesn,t turn.
SJ-That is good to know.
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Fri, Oct 24, 2008 7:00 AM
RABBIT2
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Reply to bernie:
SJ-That is good to know.
THANKS, bernie/8C 361/SJ for the info. I will check for the cover plate and try that. Thanks again

RABBIT2
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Fri, Oct 24, 2008 9:33 AM
8C 361
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Reply to RABBIT2:
THANKS, bernie/8C 361/SJ for the info. I will check for the cover plate and try that. Thanks again

RABBIT2
Sometimes when the pinion is latched in the clutch drags a bit making it hard to start the pony. This is probably your reason for wanting to kick it out.
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Fri, Oct 24, 2008 3:58 PM
RABBIT2
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Reply to 8C 361:
Sometimes when the pinion is latched in the clutch drags a bit making it hard to start the pony. This is probably your reason for wanting to kick it out.
8C 361, TOM. I have the floor boards up, (pulled them when I removed the pony motor and have not reinstalled them yet) I called myself "looking" to see if there might be a access panel and don't remember seeing one. Would it be posiable to post a picture of the one you have? Thank you Lou Ray
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Thu, Oct 30, 2008 2:32 PM
8C 361
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Reply to RABBIT2:
8C 361, TOM. I have the floor boards up, (pulled them when I removed the pony motor and have not reinstalled them yet) I called myself "looking" to see if there might be a access panel and don't remember seeing one. Would it be posiable to post a picture of the one you have? Thank you Lou Ray


Sorry it took so long to get this here, This RD4 is 4G 5546 so it might be different. It is definately different than the 7U pinion access. I was in a hurry when I snapped the picture. I should open it up and take another shot. I cant tell if there is another bolt behind the dash or not. It is right over the pinion so it should allow good access.
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Sun, Nov 2, 2008 8:26 AM
Old Magnet
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Reply to 8C 361:


Sorry it took so long to get this here, This RD4 is 4G 5546 so it might be different. It is definately different than the 7U pinion access. I was in a hurry when I snapped the picture. I should open it up and take another shot. I cant tell if there is another bolt behind the dash or not. It is right over the pinion so it should allow good access.
Attachment
By my 4G1-4G9999 parts book that little two bolt cover did not show up until 4G9401. Guess that explains why I have seen some hacked up holes in the covers😊 😊
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Sun, Nov 2, 2008 8:57 AM
RABBIT2
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Reply to Old Magnet:
By my 4G1-4G9999 parts book that little two bolt cover did not show up until 4G9401. Guess that explains why I have seen some hacked up holes in the covers😊 😊
8c 361 Tom, Thank you for going to the trouble to take the picture and post for me. My cat does not have this "access" panel. A picture is worth a thousand words.

Old Magnet, sence my cat does not have this access panel, and you said you had seen some "hacked up holes" I was wondering about drilling a couple of holes that I could put covers over and "add" me a "access" panel. Does anyone know if this was a "Mod" that could be added to the older models?

Thanks again 8C 361 for the picture it was most helpful. Thank you Old Magnet for your helpful info.

Lou Ray
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Sun, Nov 2, 2008 9:50 AM
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