It flies in the face of physics.Trafficjamz wrote:Bear45-70 wrote:I am not now nor have I ever been a fan of using a hammer of any kind on a pressed together crank shaft.
I agree that using a hammer to pound across a pressed crank is a bad idea.
But pounding out a crank that is stuck in the case does not put stress on any of the pressed fittings in the crank.
Does this make sense?
Question about crankshaft removal
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Re: Question about crankshaft removal
Bear 45/70
'83 Aero 80 X 3
'84 Aero 80 X 3
'85 Aero 80
'84 Aero 125 X 2
'84 Aero 125
'84 Aero 125 X 2
'85 Aero 50
'85 Spree
'83 Aero 80 X 3
'84 Aero 80 X 3
'85 Aero 80
'84 Aero 125 X 2
'84 Aero 125
'84 Aero 125 X 2
'85 Aero 50
'85 Spree
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Re: Question about crankshaft removal
I don't know what this meansBear45-70 wrote:
It flies in the face of physics.
new best 1/8th mile time 9.647 seconds @67.155 mph 310lbs total weight
Re: Question about crankshaft removal
"Objects at rest tend to remain at rest."Trafficjamz wrote:I don't know what this meansBear45-70 wrote:
It flies in the face of physics.
Bear 45/70
'83 Aero 80 X 3
'84 Aero 80 X 3
'85 Aero 80
'84 Aero 125 X 2
'84 Aero 125
'84 Aero 125 X 2
'85 Aero 50
'85 Spree
'83 Aero 80 X 3
'84 Aero 80 X 3
'85 Aero 80
'84 Aero 125 X 2
'84 Aero 125
'84 Aero 125 X 2
'85 Aero 50
'85 Spree
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Re: Question about crankshaft removal
It means that the bearing may be the primary sourcse of resistance but the crank assemby has inertia as does any mass. The pressure waves from the hammer will reverberate through the crant assmbly. When the bearing lets go,the half shaft will have to fight the inertia of the rest of the crank via the pressed fitting.
motormike wrote:Errands become adventures.
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Re: Question about crankshaft removal
At least, that is what I take it to mean.
motormike wrote:Errands become adventures.
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Re: Question about crankshaft removal
I am a fan off constant pressure rather than impact if you want to reuse the crank but I am not saying a hammer is wrong. Hammers are just not my preference.
motormike wrote:Errands become adventures.
Re: Question about crankshaft removal
+1eliteguy50 wrote:I am a fan off constant pressure rather than impact if you want to reuse the crank but I am not saying a hammer is wrong. Hammers are just not my preference.
Bear 45/70
'83 Aero 80 X 3
'84 Aero 80 X 3
'85 Aero 80
'84 Aero 125 X 2
'84 Aero 125
'84 Aero 125 X 2
'85 Aero 50
'85 Spree
'83 Aero 80 X 3
'84 Aero 80 X 3
'85 Aero 80
'84 Aero 125 X 2
'84 Aero 125
'84 Aero 125 X 2
'85 Aero 50
'85 Spree
Re: Question about crankshaft removal
So what tool is used to press out the crank? The steering wheel puller will certainly not work sine it can't reach any threads on the variator side.
EDIT: looking over the link on the previous page I think I could make a wood plate to bolt onto the case and use with my puller. That should work to press the crank out. No hammers and no pulling.
EDIT: looking over the link on the previous page I think I could make a wood plate to bolt onto the case and use with my puller. That should work to press the crank out. No hammers and no pulling.
1986 Spree w/ '87 SE50 motor
1985 Aero 50 w/ Dio motor: On Hold
1985 Aero 50 w/ Dio motor: On Hold
Re: Question about crankshaft removal
I have a very large puller that would work with longer bolts. The board system will work.devenex wrote:So what tool is used to press out the crank? The steering wheel puller will certainly not work sine it can't reach any threads on the variator side.
EDIT: looking over the link on the previous page I think I could make a wood plate to bolt onto the case and use with my puller. That should work to press the crank out. No hammers and no pulling.
Bear 45/70
'83 Aero 80 X 3
'84 Aero 80 X 3
'85 Aero 80
'84 Aero 125 X 2
'84 Aero 125
'84 Aero 125 X 2
'85 Aero 50
'85 Spree
'83 Aero 80 X 3
'84 Aero 80 X 3
'85 Aero 80
'84 Aero 125 X 2
'84 Aero 125
'84 Aero 125 X 2
'85 Aero 50
'85 Spree
- Wheelman-111
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Re: Question about crankshaft removal
Greetings:
I agree with Taz - see his crafty diagrams.
You can tap the crank out of its bearings, but installing it results in the kind of stress across the flywheels that can put it out of true. The Tusk Tool is an affordable and safe way to install the crank back into the cases.
I agree with Taz - see his crafty diagrams.
You can tap the crank out of its bearings, but installing it results in the kind of stress across the flywheels that can put it out of true. The Tusk Tool is an affordable and safe way to install the crank back into the cases.
Wheelman-111
Most of my money is spent on scooterparts. The rest is just wasted.
"ISO": '03 Vespa ET4 Malossi187 74MPH
Flash 9: 2001 Elite SR Contesta 72 ZX Tran, 9:1 Gears, Stock Airbox/Carb/Pipe 58.8 MPH
Punkin: 2010 Vespa/Malossi S78, 61MPH
Most of my money is spent on scooterparts. The rest is just wasted.
"ISO": '03 Vespa ET4 Malossi187 74MPH
Flash 9: 2001 Elite SR Contesta 72 ZX Tran, 9:1 Gears, Stock Airbox/Carb/Pipe 58.8 MPH
Punkin: 2010 Vespa/Malossi S78, 61MPH
Re: Question about crankshaft removal
Your right TFAG i have not eva removed a crank befor with a mallet cause i have the correct tools to do the job rednecks use a mallot
DJ1
NEK MINNIT
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dio gear swap in progress
living in chch NZ
earthquake central
NEK MINNIT
Malossi
DJ1 54mph
dio gear swap in progress
living in chch NZ
earthquake central
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Re: Question about crankshaft removal
Greetings:
Sorry to announce that Niftyman will be taking a 3-day rest.
Sorry to announce that Niftyman will be taking a 3-day rest.
Wheelman-111
Most of my money is spent on scooterparts. The rest is just wasted.
"ISO": '03 Vespa ET4 Malossi187 74MPH
Flash 9: 2001 Elite SR Contesta 72 ZX Tran, 9:1 Gears, Stock Airbox/Carb/Pipe 58.8 MPH
Punkin: 2010 Vespa/Malossi S78, 61MPH
Most of my money is spent on scooterparts. The rest is just wasted.
"ISO": '03 Vespa ET4 Malossi187 74MPH
Flash 9: 2001 Elite SR Contesta 72 ZX Tran, 9:1 Gears, Stock Airbox/Carb/Pipe 58.8 MPH
Punkin: 2010 Vespa/Malossi S78, 61MPH
Re: Question about crankshaft removal
I am a redneck too then * I used to pieces of wooden board and a rubber mallet to put my cases back together
1986 Spree/ Eve af16 swapped 65cc Prodigy vari 8g 9:1 Ruima gears
21mm OKO 42/100 32:1 45mph kymco zx exhaust
1994 Elite S 17.5mm Arreche, Daytona reeds, SEF ramp, pump plugged
1987 Elite SE50 af16 swapped
1989 Elite E SB50p
2003 Yamaha Zuma
21mm OKO 42/100 32:1 45mph kymco zx exhaust
1994 Elite S 17.5mm Arreche, Daytona reeds, SEF ramp, pump plugged
1987 Elite SE50 af16 swapped
1989 Elite E SB50p
2003 Yamaha Zuma
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Re: Question about crankshaft removal
Mystic wrote:I am a redneck too then * I used to pieces of wooden board and a rubber mallet to put my cases back together
I have never installed crank with a mallet.
This looks like a steering wheel puller and a piece of plywood. I would like to see how the tusk tool is used to remove a crank.
Or better yet, some one show me the proper tool for removing the crank.
new best 1/8th mile time 9.647 seconds @67.155 mph 310lbs total weight
Re: Question about crankshaft removal
I am sure few people approach engine work as I do. I just cant see paying 100 bucks for a tool I may only use twice especially without a steady paycheck. With the extra money and continuous use of said PrOpEr tools then yea no doubt but in a pinch you do the best you can with what you have on hand that may cause the least amount of damage if a mistake is made. I dont recommend anyone repeat my behaviors but I try to be accurate in my methods I have one of those tusk crank tools and a bearing puller on my wish list if anyone wants to make a contribution As the old saying goes there is more than one way to skin a cat...though I have never seen a cat skinned I am sure I can manage I am sure there are plenty of other people that arent going to go out and buy those expensive tools
1986 Spree/ Eve af16 swapped 65cc Prodigy vari 8g 9:1 Ruima gears
21mm OKO 42/100 32:1 45mph kymco zx exhaust
1994 Elite S 17.5mm Arreche, Daytona reeds, SEF ramp, pump plugged
1987 Elite SE50 af16 swapped
1989 Elite E SB50p
2003 Yamaha Zuma
21mm OKO 42/100 32:1 45mph kymco zx exhaust
1994 Elite S 17.5mm Arreche, Daytona reeds, SEF ramp, pump plugged
1987 Elite SE50 af16 swapped
1989 Elite E SB50p
2003 Yamaha Zuma