Starter rotation?

[55 50 Ron]

When a starter rotation for IHC tractors says CCW, that means looking at it from the gear drive end according to my thinking. Correct me if I'm wrong. Thanks.

 

[Mark EC.IN]

I'd say you are correct. If you need to double check yourself, you can see which direction the engine turns on the tractor by looking at the fan and go from there.

 

[Janicholson]

I'd say you are correct. If you need to double check yourself, you can see which direction the engine turns on the tractor by looking at the fan and go from there.

Unless the fan is a pusher!. Other than GMC 2 stroke modular engines, most turn CW from the accessory drive end. Jim

 

[used red MN]

When a starter rotation for IHC tractors says CCW, that means looking at it from the gear drive end according to my thinking. Correct me if I'm wrong. Thanks.

Yes, I agree! For the majority of IH tractors save a few oddballs l am not aware of a counter clockwise starter would install from the back side (drivers seat) of the flywheel ring gear. A clockwise starter would install from the front or radiator side of the flywheel, like a Cub for example.

 

[55 50 Ron]

Unless the fan is a pusher!. Other than GMC 2 stroke modular engines, most turn CW from the accessory drive end. Jim

Jim,

Are you calling the "accessory drive end" the same as the "gear drive end" as I did?

Maybe I'm turning this into an Abbott and Costello "who's on first" scenario ???

 

[wore out]

Yes, I agree! For the majority of IH tractors save a few oddballs l am not aware of a counter clockwise starter would install from the back side (drivers seat) of the flywheel ring gear. A clockwise starter would install from the front or radiator side of the flywheel, like a Cub for example.

For most common engines you've got it! Exceptions would be some "Jimmies" (as Jim wrote) or counter-rotating boat engines, neither of which would apply to common IH tractors.

Front of the flywheel or back of the flywheel mounting is the determining factor.

In the case of a front-of-the-flywheel starter, starter rotation will be CW nor matter if it is mounted on the LH or RH side of the engine.

 

[used red MN]

Jim,

Are you calling the "accessory drive end" the same as the "gear drive end" as I did?

Maybe I'm turning this into an Abbott and Costello "who's on first" scenario ???

I should probably let Jim speak for Jim, the way I interpret it he is replying to Mark who made a general statement about checking engine rotation by looking at the fan. Jim is calling out the “accessory drive” end of an engine which is usually the opposite end of the flywheel. In the case of IH tractors that is the front or fan end, which makes his assessment of rotation as clockwise correct. So I don’t think he was making any statement as to the direction a starter turns or what the nomenclature is concerning it.
Ron if your quest is to determine which direction a starter being sold is turning by description I believe that looking at the “drive end” would be the normal position of description.
Unrelated to starters to keep the “who’s on 1st” scenario going. An accessory drive on a 2 cycle Detroit could be on either end. I remember seeing cab over semi tractors back in the day with 6-71s, the back of the engine stuck out from under the cab. Often they had an accessory drive on the back of the cam that ran the alternator. Incidentally the cam in a 2 cycle Detroit turns the same speed as the crankshaft because the cylinders fire every revolution. Also the cam is only operating the exhaust valves, because there are no intake valves. The cam is however is providing stroking for the injectors.

 

[Fritz Maurer]

This discussion is a lot like trying to describe to someone whether the wheels are "dished in" or "dished out".