Vacum Pump squeal

[Spun4Fun]

I narrow it down to Vacuum pump area as i sprayed double squirt of WD40 and it was quite so am sure the bearing on its way out once the WD40 effect has been worn out now the chirping / squeal is back based on what i see on this link there is a retainer clip holding a sealed bearing that i could pull and replace ..!

Any one successfully done that

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[franklin2]

Is this the same unit in this link?

http://www.thedieselstop.com/forums...s-i-think-vacuum-pump-rebuild-bearing-259366/

 

[79jasper]

Yeah, someone here posted about it a little while back.

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[Macrobb]

Also, something I learned about these vacuum pumps is that the back side of it contains oil.
Internally it's got something that looks like a cam lobe and follower - No lubrication and those parts will wear very quickly and seize solid.

So, when replacing stuff, put the new bearing in and then fill the back side of it with oil(there's a little screw on the very back of the unit).

 

[Spun4Fun]

The weird thing i just noticed as i paid more attention to it is the sound goes away completely when the truck get driven for some miles

 

[Spun4Fun]

Is this the same unit in this link?

http://www.thedieselstop.com/forums...s-i-think-vacuum-pump-rebuild-bearing-259366/

Thank you for sharing this great link

 

[rpm427]

Are you sure it's the pump?I had a similar deal and turned out to be the ribbed belt?I replaced it and noise went away

 

[Hydro-idi]

Good idea to fill new vacuum pump with oil. They come with very little from the factory. STP is great for this application.