Onan engines question?

don't hold me to this but there is probably no difference at all, the generator is limited due to the generator head can't turn but so hard. if anything is different it's probably the carb tuning and the governor setup.

just my two cents

I will swap out my crankshaft. I thought the cam and governor would be different to gain the RPM's. Rods will swap too. This is what I was mainly concerned with. I need to know about cam ,governor, and timing gears? Tracy

Tracy Martin TN wrote: I will swap out my crankshaft. I thought the cam and governor would be different to gain the RPM's. Rods will swap too. This is what I was mainly concerned with. I need to know about cam ,governor, and timing gears? Tracy

The generator engine as you already know uses a shirt stubby crankshaft, some guys will turn the tapered shaft down then cut a key-way to accept a Lovejoy coupler. Machining can be done with out disassembling the engine if you have a large metal lathe.

Generator 1800 rpm engine uses ten ball bearings in the governor remove the small spring clip to gain access then remove five of the bearings to obtain 3600 rpm.

When reassembling the timing cover make sure the hole on the timing gear with the plastic insert is located in the 3:00 o'clock position. The pin on the timing cover must insert into this hole.

Get the pin location wrong the governor will not work.

Crankshaft end play tolerances  min/max .006 / 012

I've just completed the same parts swap.


Edited by rustydollar - 09 Aug 2017 at 2:53am

Tracy Martin TN wrote: I thought 5 balls was 3600 and 10 balls was 1800.

The slower running 1800 rpm generator engine requires more mass to facilitate the centrifugal forces required to operate the governor.

Centrifugal Governors :

Inertia Governor :

Edited by rustydollar - 09 Aug 2017 at 2:50am

The camshaft from the generator engine  are identical with the exception the lobe that operates the mechanical fuel pump may not have been profiled and ground as the gen sets use an electric fuel pump.

The valve lifter on he right hand side is new style, I installed the old style as it looks like it may have better oil retention and distribution
 in the bore.

Tool that I made to remove the main bearings.

Generator engine having the tapper turned down to accept love joy coupler to drive a hydraulic pump.

Not my engine.

Old style versus new in cylinder heads, the new style has more cooling fins with more surface area also the spark plug has been relocated.

I'm using the new style shown on the left.

This may give you some ideas on how to re-purpose a generator engine. The armature shaft is easily removed using a hydraulic press, the center hole is drilled right through so the shaft maybe cut down in length.



 

Your generator engine may not have an oil filter but you'll find that the base has been machined into the engine block to accept the filter.

You just need to drill a few holes then thread two to hold the filter adapter in place. Or you could install a remote filter.

Hopefully Tracy will add to this thread once he has started his engine rebuild from donor parts, in the meantime I have an engine to complete and install into my Simplicity Powermax 9020.

Let there be fire, tomorrow is engine start up day. This will be a bench run.


Edited by rustydollar - 09 Aug 2017 at 9:34pm

Tuesday another road adventure, according to google maps 3.5 hours from home.

I'll be off to purchase another CCK Onan engine that was removed from a Simplicity Powermax 9020, previous owner did a re-power with a newer Vanguard engine.

I feel like I'm keeping a personal diary, keeping personal notes to self for future reference. The forum has proven to be a very lonely place.

Tracy Martin TN wrote: Rusty, you help and advice is greatly appreciated. Most folks take for granted the time and effort to post and answer questions, especially when it comes to pics. Thanks  Tracy

Your welcome Tracy, where are you at with your parts swap.

The generator engines with cast iron blocks will be identified on the engine tag  as 40CCK and 50CCK.

I left home at 9:00 am to pick up another Onan engine, a full 12 hour trip. This engine has the heat shield and the air filter that I'm missing from mine. Plus I got the front PTO clutch magnet the rest is toast,  still no muffler, maybe eBay.

This engine ran when the guy pulled it out of the Simplicity 9020, said it ran rough. I may have found the cause the throttle shaft bushing on the carburetor is badly worn and the friction disks on the electric clutch are toast.

I think he may have had difficulty finding a new clutch and this was perhaps the main reason he swapped the engine out for a Vanguard.

Most people make the mistake of engaging the clutch with to many engine RPMs, should always idle the engine down before engaging.

The implement your trying to run will be stiff from sitting idle for a week or so and will probably stall the engine a couple of times before the mechanicals are freed up enough for the idling engine to overcome.

Patients pays off in spades , when your getting three times the life span from your electric clutch over that of your neighbor.







Edited by rustydollar - 13 Aug 2017 at 10:38pm

Thanks for info. It is appreciated. Tracy

I just unhook the clutch linkage and PTO shaft, driveshaft and it allows a good bit of clearance to work belts on pulleys. flywheel belt has to hang on pulley first then you can work other on, I'm not sure how to explain it here but I've found it works best for me.

Gotrek wrote: I hope you get good use out of that motor.  It was nice to finally meet you after years of chatting with you on forums :)

Pleasure was mine, and I'm grateful you decided to sell the engine to me. I'm in my element with mechanical  things, chemistry boggles my mind.

Pat and I made a few stops today, first to drop off that hub for the cad work, a bit of shopping then two landfills for more shopping on the way home.

At the first landfill someone had disposed of an old Evenrude engine, I pulled the carburetor off in hopes of adapting it to another engine. The carburetor won't care if it's a two or four stroke.

The pile of cutting edges are still at the second landfill, they look like new. Next trip I'll have some room on the truck.

Not sure if its worth your time to make the trip to my neighborhood, but if you want a decent heavy duty cutting edge I'll set one aside with your name on it.

Here's an idea for your blade and it's free just pay the postage.

I purchased a few Toro lawnmowers from the local gold course the grass cutting reels had small hydraulic motors. A small motor with an eccentric to make some serious vibration would keep snow from sticking onto the blade and chew through ice and hard packed snow.

Your tractor has the hydraulics to power the pump.


Edited by rustydollar - 25 Aug 2017 at 4:50pm