Post by Bashan on Dec 19, 2010 20:54:56 GMT -6
This is a device I constructed for removing and installing the torque spring (aka main, aka contra) in a 150cc GY6 clutch. Although the spring only presents significant resistive force in the last two inches of compression, caution is advised in using this device as explosive expansion of the spring could occur if the clamps are improperly placed and should slip. Wear eye protection and DO NOT use this method if you are not comfortable with the use of these components!
I used Irwin quick clamps that are about about 12 1/2" long, I found them on sale at Lowes in a four pack, I'm sure other clamps would work equally as well. The dimensions and building methods on this device are general and your own materials and procedures can be easily adapted. I removed the small pin stop from the top of the clamp but I think I would have had adequate upward clamp travel without doing so.
I used the corner clamps shown here:
To build this base using 5/8" plastic spacers:
I replaced the yellow OEM pads on the upper clamp jaws with these clear stick ons also from Lowes:
They have a bevel that fits nicely up against the curvature of the clutch pad assembly:
Drill slightly elongated holes in bottom of Q-Clamp to allow for bottom clamp adjustment:
Bolt the bottom of the Q-clamp about this far in to the base, JUST tight enough to steady the clamp but allow some movement, the 5/8" spacers should be tight:
To position the bottom yellow pads, tighten the four clamps on the clutch assembly. Then tighten the bolts marked with the red arrows with the base pads pushed into position from the clamping pressure:
IMPORTANT! The retaining nut on the clutch assembly should be loosened in a vise before disassembly in the device, and tightened after assembly in the device. Be careful to loosen the nut just enough to be later removed by hand but not enough to allow the assembly to come apart! Spread the jaws of the vise slightly wider than the width of the retaining nut, and then tighten the vise jaws firmly but do not over tighten. Here the vise is shown with the clutch assembly 90 degrees to the floor for illustration purposes. It is much easier to work with the retaining nut on the clutch pulley shaft pointed downwards. The strap wrench should be positioned around the clutch pads, NOT THE PULLEY!:
How to use:
Youtube video showing usage outlined above:
I used Irwin quick clamps that are about about 12 1/2" long, I found them on sale at Lowes in a four pack, I'm sure other clamps would work equally as well. The dimensions and building methods on this device are general and your own materials and procedures can be easily adapted. I removed the small pin stop from the top of the clamp but I think I would have had adequate upward clamp travel without doing so.
I used the corner clamps shown here:
To build this base using 5/8" plastic spacers:
I replaced the yellow OEM pads on the upper clamp jaws with these clear stick ons also from Lowes:
They have a bevel that fits nicely up against the curvature of the clutch pad assembly:
Drill slightly elongated holes in bottom of Q-Clamp to allow for bottom clamp adjustment:
Bolt the bottom of the Q-clamp about this far in to the base, JUST tight enough to steady the clamp but allow some movement, the 5/8" spacers should be tight:
To position the bottom yellow pads, tighten the four clamps on the clutch assembly. Then tighten the bolts marked with the red arrows with the base pads pushed into position from the clamping pressure:
IMPORTANT! The retaining nut on the clutch assembly should be loosened in a vise before disassembly in the device, and tightened after assembly in the device. Be careful to loosen the nut just enough to be later removed by hand but not enough to allow the assembly to come apart! Spread the jaws of the vise slightly wider than the width of the retaining nut, and then tighten the vise jaws firmly but do not over tighten. Here the vise is shown with the clutch assembly 90 degrees to the floor for illustration purposes. It is much easier to work with the retaining nut on the clutch pulley shaft pointed downwards. The strap wrench should be positioned around the clutch pads, NOT THE PULLEY!:
How to use:
Youtube video showing usage outlined above:
..BAD TO THE BONE..
But what does "SUH" stand for my brain is haveing a brain fart 
And I did not mean to em-bare-arse-you, just thought i would mention the "THINGY" ;D.
