Originally Posted by Mike S
May I suggest that if you want the best in vibration absorption, you use a rubber washer under the bolt head/washer in addition to the one under the pump.
And, I would safety wire the bolts.
I like the rubber washer idea. Probably not going to safety wire the bolts though. I can barely loosen them when I use the allen wrench due to the "squashed" nature of the platenuts they mate to. If somebody persuaded me to actually go through that trouble I would have to find 10-32 bolts that were drilled for wire because I don't really want to spend the time to drill the holes myself.