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D2 pony motor balancer
D2 pony motor balancer
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6 years 5 months ago #188895
by Hal
I have been trying to remove the balancer from the crank on my pony motor and the pullers slipped off taking a chunk of the balancer with it. The chunk is maybe 3/8” square and at the deepest 1/16”. Will this throw it too far out of balance and ruin bearings etc ?
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6 years 5 months ago #188897
by neil
Doesn't seem like much but to compensate, just grind about the same amount of material from the opposite side and you'll be golden. To remove the flywheel, get one of those cheap 10t hydraulic pullers from Harbor Freight and a couple of bolts and heavy washers from Fastenal. Apply the pressure on the puller and then tap on the circumference of the flywheel and it'll pop off. Leave the nut on about 1- 1 1/2 turns from tight so the flywheel doesn't take off
Cheers,
Neil
Pittsford, NY
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6 years 5 months ago #188904
by dpendzic
there has been a lot of posts on here advising us to never pull on the flanges---I think OM even posted a puller he designed to pull the hub off
D2, D3, D4, D6, 941B, Cat 15
Hancock Ma and Moriches NY
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6 years 5 months ago #188905
by neil
You just need a regular two-bolt puller. Hydraulic enables you to ramp up the pressure before you tap
Cheers,
Neil
Pittsford, NY
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6 years 5 months ago #188906
by TOGNOT
I made such a puller.... Two long bolts ( about 12" or so) that thread into the balancer. At the "head" end of the bolt a pieces of 1" thick steel about 8" x 2". 2 holes in that plate match the distance between the holes in the balancer. Place a hydraulic Jack ( that will work on its side - some won't ) between the plate and the pony shaft.
On a D6 I did this and had to use a cheater bar on the hydraulic Jack. I covered the entire assembly with a heavy tarp, expecting shrapnel to fly or the Jack to blow. There was a loud bang, but the balancer popped off.
I posted pictures in an old post about this....
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6 years 5 months ago #188923
by dpendzic
I guess balancer comes from a harmonic balancer that drives fan belts on an engine??
D2, D3, D4, D6, 941B, Cat 15
Hancock Ma and Moriches NY
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6 years 5 months ago #188925
by neil
Hal, it looks like a balancer with that meaty flange but it's just solid cast iron and serves as a flywheel. On models with electric pony start, there's a belt groove machined into that flange so it's a bit thinner.
Cheers,
Neil
Pittsford, NY
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D2 pony motor balancer
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