MTD990 Repower 13 Magneto Swap
This engine has a 3 brush 6V generator. This is a 12V tractor. It barely keeps up with the current draw of the ignition.
So, I'm replacing it with a magneto. Now the ignition isn't running down the battery when the engine is running.
A 12V charging system will be added later.
Magneto timing is fixed. Set the crank shaft to top dead center. Install the magneto with the marked timing gear visible in the inspection hole. Timing done!
Enjoy
Checkout my Train Stuff channel.
https://rumble.com/c/TrainsStuff
And my Wandering About channel.
https://rumble.com/c/c-1192873
Thank's
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MTD990 Repower 12 Hitch Work
Nothing on the back of this tractor is centered or symmetrical.
A neat "feature" of putting the rear tire weight on the inside. The pin on the right side doesn't fit!
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MTD990 Repower 11 Charging Circuit
The MTD900 Wisconsin THD engine swap project
Not much progress today.
My shiny "new" chrome timing light is no-op. Something to look at later.
Charging WOWs. Confirmed my suspicion the generator is 6V. 12V generator should output 19 to 20 volts.
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MTD 990 Project Rear Seal Replacement
Even projects need repair from time to time. Rear seal replacement with bonus rear inner wheel weight removal. Weights are 60 lb each.
Stay tuned for the next exciting installment. Amping up my charging circuit wows.
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MTD990 09 Repower Accessory Mount
MTD900 Wisconsin THD engine swap project
https://rumble.com/c/c-576013
The rear accessory mount for throttle cable and gas line input.
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THD990 08 Repower Dash Tower Work
MTD900 Wisconsin THD Repower
https://rumble.com/c/c-576013
Working on the dash tower.
A project for a Wisconsin 2 cylinder. The MTD900 is a nice fit. Want to have a useful machine.
To do list. PTO pulleys. Proper gas tank. Proper three point. Charging circuit. It has the classic one head light look, but proper lighting at some point.
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THD990 Project Timing the THD 07
May 28, 2022 THD990 Project.
After fixing the distributor terminal. Checked the timing. Something that needed to be done anyway.
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THD990 06 Progress
Scored a nice Century battery charger. Looks like new, works like new.
Bought a second running MTD990 with a good mowing deck. Swapped the rear tires. Like the classic look better. The "new" tractor came with wheel weights. Kept the weights for this tractor. I tuned and greased the new tractor. I gave it to my grandniece. Every little girl needs her own tractor. :)
More work on the exhaust. Works for now. Fixed the parking brake. One of the friction pads as missing. Reworked the parking brake pull lever.
I notice the head gasket was leaking. Pulled the head. Wet sanded the head on a piece of glass till the lows spots were gone. Double checked the head bolt torque.
Added a heat vent to the hood. Added a gas strainer.
After adding the gas strainer the engine would not start. After some investigation I found no spark. After some more investigation I found the insulator on the distributor electrical post was brittle and broken. Grounding the ignition. Glad it failed at home in the garage.
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MTD THD Repower 05
Cool, useful wrench from the swap meet.
More tweaking on the steering.
Patched the ratty spark plug holes in the cooling shroud. Massive improvement in cooling air flow.
Need to start looking at the charging circuit.
Killed most of the hood rattle.
Oil bath didn't have the oil bath part. Replaced it with a paper filter.
Bad acoustics, last time filming next to the house.
Much better sound. This camera on a glumy afternoon with low light.
https://rumble.com/vfpn1x-cn-heafford-junction.html
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MTD 990 Steering 04
I expected everything to need rework. Move one thing and ...
The steering is more work than anticipated. Worked fine jacked up with no weight. On the ground turning right it would bind. Maybe 25% turning left and 80% tuning right.
Found a lot of wear between the front axle and the spindles.
I drilled the axle and added bushing. Much better but still needs work. I drilled it with a drill press. I think a mill would have been a better choice. If only I had a mill. Or drilled through and add a sleeve.
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MTD990 Relocated Steering Column
3 Of many more to come.
First test drive with relocated steering column complete with camera cap and strap.
Plan B works, not complete yet. But works as it should.
Plan A was a complete failure.
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MTD990 Repower THD Wisconsin 02
MTD990 Repowered with a THD Wisconsin. Jan 2021
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MTD990 Repower First Drive
MTD990 repower with Wisconsin THD First Drive. November 2020
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