Had a coolant pump go out on a Haas VF-2SS last Friday afternoon

I mean, it was making this weird grinding noise for maybe an hour before it just quit. I had to shut down the job, which was a run of 50 aluminum brackets for a local shop in Dayton. Ended up pulling the pump, cleaning the whole system, and putting in a new one from Grainger, but it killed my whole schedule. Anyone else had a coolant pump fail right at the end of the week?

3 comments

3 Comments

nelson.finley3mo ago

Used to just run stuff until it died, figured a noise was just part of the job. A pump seizing on a Friday afternoon like yours changed my whole view. Now any weird sound gets an immediate look, even if it means stopping a job early. Losing a weekend to a breakdown costs way more than an hour of lost spindle time. That grinding was its death rattle, and it never gives you a good time to die.

coleman.jade3mo ago

Losing a weekend to a breakdown" is such a perfect way to put it! I never really added up the cost like that before, but you're totally right. That hour of lost time seems like nothing compared to a whole Saturday shot.

the_james1mo agoMost Upvoted

And the thing that really gets me about that "death rattle" idea is how often it's not the part that's making the noise that's actually dying. Had a compressor once that sounded like it was eating itself alive, turned out to be a loose bracket three feet away rattling against the frame. Replaced the whole pump before I figured that out, cost me a bundle and a half. So now the rule is listen close, figure out where the sound is coming from, but don't assume the noisy part is the bad part. Sometimes the rattle is just telling you something else is about to let go, not itself.