I am working on a Nissan forklift with the z24 engine. We have been unable to remove the crank sprocket we have tried traditional harmonic balancer puller and snapped the bolts, we tried a 3 arm gear puller and maxed out a 1200lb impact then twisted the bolt off of the puller with a 3' breaker bar. The puller is rated at 7 tons. Am I missing something for removing this sprocket?
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