[trampsdieseltruck]

my vacuum pump is starting to make a squealling noise.are there bearings that i can change in it.any info on this would be helpfull

 

[Snotzalot]

A new pump is about $120 USD and is a good choice since it's the diaphragm that needs replacing before the bearings wear out. IMO it's best to replace.

 

[trampsdieseltruck]

i tried to take it off,2 bolts came out easy 3 wont budge and dont want to snap to bolt off so i thought it would be easy if i could remove/replace the bearing

 

[Snotzalot]

Try tightening that 3rd bolt just a wee bit and then loosen, and repeat .