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There are so many ways to remove school bus seats, so I wanted to figure out the best way. Any method is exhausting, but I experimented with several different strategies to discover the fastest, easiest, and most economical approach.
The most straightforward approach seems to be using wrenches and/or impact drivers to remove the nuts. This approach world best for two people: one inside the bus and one underneath. However, for most of this process, I was by myself. Moreover, the nuts were so rusty on the bottom that I doubt they would have come off anyway.
Second, I tried snapping them off by cranking them extra tight with an impact driver (amzn.to/2u1kBNH) powered by my 8-gallon compressor. In 10 attempts, I only managed to break off one bolt. Onto strategy #3!
Using a 4 1/2 angle grinder (amzn.to/2GLZu4q) and a cut-off wheel, I cut the heads off a couple of bolts. I averaged about 1 1/2 minute per bolt...7 minutes per seat. While this worked, it also presented a couple of challenges. First, I began chewing through cut-off wheels at an alarming rate. Living in the woods, I really didn't want to lose a couple of hours of bus work driving into town for more tools. Second, I found it difficult to get under the bolt head. I would cut through the head leaving 1/8 or 1/16 of an inch of the head which made it difficult to snap the seat out.
So, I next tried cutting a groove into the head and attacking the bolt with an air chisel. No luck. I don't know if I needed to sharpen the (brand new) chisel blade even more or if air chisels with 8-gallon compressors just aren't powerful enough to get the job done.
Which brings me to the method I found the best: grinding a starter groove at each bolt with a grinding wheel, then finishing it with a cut-off wheel. Even with a 2-step process, it only took a few more seconds per seat and I managed the entire job on one grinding wheel and two cut-off wheels.
Best of luck! Please post questions or your strategies in the comments!
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