Ok, it really didn't go this smoothly. I will leave out
all my mistakes which ate up a ton of time. Live and learn. Hopefully by posting these tips it will save you guys from making the same mistakes.
Tools needed
aforementioned Baldor Kit.
Gear Oil- I used Mobil I synthetic (what the Baldor factory uses)
7/16" wrench
7/16" deep well socket
#2 phillips screwdriver
1/4" nutdriver
Brake cleaner
Cleaning brushes
paper towels
anti seize
silicone grease
paint (to re-coat gearbox)
Remove oscillating motor from mount and remove gearbox. I left it connected.
If you can get the screws out without them breaking, half the battle is won. I marked the shaft so I would know how the assembly went in. I took a rubber hammer and tapped on the the left shaft and and the entire assembly and cover popped out. I noted the placement of the washers and small things that looked like tiny bearings on the shaft
I clean out the gunk with a can of brake clean and my wife's toothbrush.
I then lubricated the rubbed seals with silicone grease and put the new shaft assembly back in.
I covered the internal machined parts and coated the gearbox with some spray galvanizing I had. I put the screws back in after treating them with anti-seize and put the gearbox back on. I placed the gearbox on it's side and topped it off with 2 ounces of gear lube. I then re-attached the motor to the mount and re-connected the rod going to the spraybars. However, after mounting I noticed an excessive amount of side to side play in the shaft assembly in comparison to the other motors, so I took the asembly back apart and shimmed the internals with a stainless steel 1/2" washer. This took all the excess play out.
Cost was $80 for the kit and $20 for the quart of sythetic gear oil (of which I used two ounces). I could rebuild another one is about an hour. I ordered a repair kit from my Baldor rep and plan to have a rebuilt one ready to go. I could swap this gearbox assembly out with a rebuilt one faster than I could change the motor.
Time will tell if this was a smart use of time and money. I got four years out of the $400 oscillating motor. I figure if I get two more years out of the oscillating motor, the rebuild was worth it. Less than a year and I would have just been better off to replace the entire assembly.
Hope this helps!