Water pump bearing and plunger grease

Bryce C

Bryce C

DFW
Joined
Feb 9, 2024
Messages
627
Location
Connecticut
Name
Bryce
Apologies I don't have a pic of the internals. But this electric 500 psi Pumptec water pump has a cavity where the bearing interfaces with the plunger. I just rebuilt the pump and it was working fine for a few weeks but is now knocking. I wonder if I may of not greased the bearing/plunger area properly. Can I just use a high quality bearing grease and pack that cavity with it? I used a small packet of grease that came with the rebuild kit and I wonder if that is the issue...
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S

scotty747

Member
Joined
Oct 19, 2006
Messages
875
The knocking might be air being sucked in and cavitating. Easier to suck air than water. Make sure there is nothing loose sucking air.
 
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Bryce C

Bryce C

DFW
Joined
Feb 9, 2024
Messages
627
Location
Connecticut
Name
Bryce
scotty747 said:
The knocking might be air being sucked in and cavitating. Easier to suck air than water. Make sure there is nothing loose sucking air.
Click to expand...

Brilliant! I'll do that, thank you!

So probably not a grease problem eh? As a side note, is it ok to use typical bearing grease, and plenty of it, in the bearing/plunger cavity?
 
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