where to get a key

The key was shipped with the truck when it was new. Where are they now............

 

Have you tried the co. that built the air cleaners? Worst case is you can cut the bolts off.

 

Im guessing your breathers are either made by Donaldson or Vortox. I would give them a call.

Is that an actual key, or some sort of special socket that on them?

 

quickest way is take a hammer and chisel, or air hammer to get them off, and just put new bolts on them.

 

do the bolts look like this..??

http://www.summitcontractorsupply.com/images/wtc_spline.jpg

if so, its a spline socket that you can get at Granger, maybe Home Depot/Lowes, Craftsman...

 

The lock pattern on the bolt looks like this.