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Kohler 10M61H3 genset (1948) question


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  #1  
Old 02-18-2019, 09:30:00 PM
Grand1530 Grand1530 is offline
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Default Kohler 10M61H3 genset (1948) question

Hello everyone: I am totally new to this and any forum so I hope you will bear with me during the learning curve. I am presently working on replacing the rear crankshaft seal on our original Kohler of Kohler 10M61H3 genset s/n 100948. It is a 1948? model 10KW 10KVa 115/230 44 amps/terminal 1 phase 60cycle 1200 RPM genset in incredible condition despite the extensive hours it would have on it(is an ex "early warning defence system" genset). Motor is a Waukesha FC.140E 3.25X4 gas s/n 625900 4411 running at 1200 RPM. I am unable to separate engine from generator body so I can replace rear crank seal on engine. The operator manual I have has a partial parts listing but is somewhat incomplete in the area where the generator shaft attaches to the armature. Could be some corrosion but unit has been inside a dry location its entire life. We removed 6 bolts from a hub behind cooling fan that I thought might be attached to generator shaft and the four bolts that attach end plate onto generator body but unit will not separate more than give in crankshaft and armature bearings.. Any advice or info would be greatly appreciated. Thanks, Brent
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Old 02-18-2019, 11:04:26 PM
jack0 jack0 is offline
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Default Re: Kohler 10M61H3 genset (1948) question

I wouldn't go any further until you read Mike Cushways (Kohler disassembly).
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Old 02-18-2019, 11:08:59 PM
Grand1530 Grand1530 is offline
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Default Re: Kohler 10M61H3 genset (1948) question

I,ll do that right away. Thanks so much jackO!
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Old 02-19-2019, 08:38:18 AM
Mike Cushway Mike Cushway is offline
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Default Re: Kohler 10M61H3 genset (1948) question

Brent,
That was ages ago. If I remember correctly, the fan has the timing marks and needs to go back on in the correct position. Double check by locating #1 piston on tdc for firing before removal. I bought one of these plants one time and gave myself fits by trying to start it using the timing marks to set the magneto. The fan had been reinstalled incorrectly at some point in its life and was not phased correctly. Shoot pics of the plant when you get a chance. I always enjoy seeing them! MikeC
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Old 02-19-2019, 11:31:42 AM
Grand1530 Grand1530 is offline
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Default Re: Kohler 10M61H3 genset (1948) question

Hi Mike: thanks for responding to my post. In the little amount of time I have been on this forum, I have seen your input many times so was hoping to connect with you. I have tried to upload three pictures of our genset so hope I have been successful. Have not been successful in finding your Kohler Dissassembly thread yet but will keep trying. Regards Brent
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Old 02-19-2019, 01:24:57 PM
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Horse Power at 511 Horse Power at 511 is offline
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Default Re: Kohler 10M61H3 genset (1948) question

You will need to slide the field / stator off over the armature at least partially. You will then find that the armature flange bolts onto the end of the crank with four hex head bolts. I forget what size the hex is, maby 5/8 or 11/16. As I recall it is a bit of a pain to get a wrench on those bolts.
Very nice looking set by the way!
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Old 02-19-2019, 03:06:30 PM
Grand1530 Grand1530 is offline
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Default Re: Kohler 10M61H3 genset (1948) question

Wow, Thankyou very much for that insight! i hadn't even thought of trying to undo the bolts that attach the generator shaft to the crankshaft- I was working on the other end of the generator shaft. I'm going to go in with a bore scope here shortly and get a visual on how it is put together then we can see how to proceed. The Kohler works beautifully just slobbers oil out of PTO end crank seal so I don't want to break any good parts that can't be found . :-)
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Old 02-19-2019, 07:03:32 PM
Mike Cushway Mike Cushway is offline
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Default Re: Kohler 10M61H3 genset (1948) question

Regardless of how you approach it, be careful that once the generator end bearing is loose of its housing, you dont drag the armature across the field poles. There is very little clearance between the two. Pull all the brushes out of the brushholders including the slip ring brushes so you dont damage anything. Sling the engine well as it will fall after you remove the 4 flange bolts. I would seriously consider new main bearings at this stage of disassembly.
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Old 02-20-2019, 09:45:16 AM
Grand1530 Grand1530 is offline
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Default Re: Kohler 10M61H3 genset (1948) question

Well, I'm certainly sold on the power of a forum such as this one! 35 hours after joining my first forum and with the the feedback from jackO and Horse Power at 511 and Mike Cushway we have the engine separated from the generator without any damage. Removed all brushes from slip rings and welded a 1" NF nut on the end of a piece of 1.5" shaft . Screwed this onto armature shaft after removing bearing retainer nut and supported shaft on a roller stand. Lifted engine weight with an engine leveler on a motor hoist and apart it came gently. I have picture of the apparatus and procedure but couldn't figure out how to make room on the system to post the three pictures. Thanks again for the help. Regards Brent
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Old 02-20-2019, 11:58:34 AM
Zephyr7 Zephyr7 is offline
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Default Re: Kohler 10M61H3 genset (1948) question

You can protect the edges of the poles when pulling out the armature by sliding a piece of durable plastic (UHMW polyethylene for larger gaps, kapton for smaller gaps) in the gap prior to removal. With the plastic in place, any unexpected sideways wiggling just scuffs the plastic instead of potentially damaging anything important.

Bill
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