Stuck Sprocket

[dieselsamurai]

Yeah I guess high torque low rpm , we had radial motors on our boats winches

I suppose minidiggers use gearmotors with planetary gears now as cheaper

 

[Kram]

You said it only had a slight leak, so you might get away with a Sealmate tool to pull any dirt out of the seal lips. Commonly used for motorbike fork seals. Its a thin strip of plastic that you push into the seal and swipe around, pull out with all the dirt.
Milk bottle plastic is a common cheap alternative.

 

[dieselsamurai]

You said it only had a slight leak, so you might get away with a Sealmate tool to pull any dirt out of the seal lips. Commonly used for motorbike fork seals. Its a thin strip of plastic that you push into the seal and swipe around, pull out with all the dirt.
Milk bottle plastic is a common cheap alternative.

Ah yeah might be worth a try i suspect something has got in there as its not a significant amount , didnt think of trying that cheers

 

[jsf55]

I was going too say aa thin sleeve of sorts might hold the oil back a bit longer, or even grease it full instead of oil ?

 

[RichardM]

Is there space between the housing and sprocket to add another seal?
Thoughts are a sleeve loctited onto shaft, then a seal and seal housing screwed to the existing housing.

 

[dieselsamurai]

Unfortunately there's about a 2mm gap between the Shaft and the housing and the sprocket is very close to it when fitted so no chance to add an additional seal
You can see in this picture how it is all one casting

 

[Turbo]

Maybe fit a well greased thick o ring before you refit the sprocket. It might slow the leak down and will last a good while because it turns so slowly. Sand the mating faces smooth first.