Where can I download a manual for Comet BXD 2525?

On pump assembly page 30 in manual
https://www.northerntool.com/images/downloads/manuals/15781820.pdf

L'utiliser cette pompe sans huile est une erreur fatale:

[PDF]COMET PLUNGER PUMP SERVICE MANUAL INDEX

www.cometpump.com/_images/support/Pump_Repair_Manual.pdfLUBRICATION: Make sure crankcase is filled with Comet Pump oil. Running this pump without oil will cause damage and void any warranties. Change the pump ..

out the drain plug ? Sight glass window ? Under the pump where the crankcase meets the pump head?
tighten plug, replace oring on sight glass or replace low pressure seals if near the pump

https://www.pressureparts.com/mmDEV/PDF/Comet/BXD.pdf

Download the scanner driver.

It could be that the linkage between the engine and pump is broken. Try the key on the drive shaft. This is a piece of metal that locks the pump shaft and the engine shaft. If it still pumps water the problem probably lies elsewhere.

You can download it from the following link:

http://support.t-mobile.com/doc/tm30366.pdf?


Cheers

the water inlet needs a gasket like all hose connections. If its gone the pump may be starving for water.