I don't have one but it shouldn't be much different than the others I have seen and I'll assume it has steel tracks...there should be an opening or a cover on the track frame, possibly in the middle or a little closer to the idler wheel end, inside the opening there should be a grease fitting, this is connected to a cylinder that is connected to the idler wheel, when you pump grease into the fitting it fills the cylinder and pushes the idler wheel out putting tension on the track. DO NOT make it too tight, a little more slack is better than too little.