Anyone have much experience with positive displacement blowers? I bought a used piece of equipment (sewer jet/vac) and found out the hard way that the safety mechanism/switch to shut the blower down if it comes into the danger zone of possibly sucking water into the blower doesn't work... Yep, blew water right out of the top of the blower silencer/muffler. Not a pretty sight. So how much damage did I do and what should I be looking for as far as imminent breakdowns? Thanks!
You are using an out of date browser. It may not display this or other websites correctly.
You should upgrade or use an alternative browser.
You should upgrade or use an alternative browser.
Roots 824 PD Blower
- Thread starter P Dubya
- Start date
txvwnut
Well-known member
You might be okay but there really isn't a lot of room in the pd blowers for water. I've been told you can get away with it once or twice but that's the limit before it gets ugly, and that's if you shut it down right away. Once you kill a pd blower your pretty much done with it. I run fans on the trucks that I get to maintain at the day job. They pull better and are a little more forgiving when you overrun the vacuum breaker.
I've got a road stripe remover that uses a pd blower and I've had to buy it once and I think it was around 8 grand. The reason for the replacement was it broke the input shaft off the main rotor. Still don't know what cause it.
What brand did you buy?
I've got a road stripe remover that uses a pd blower and I've had to buy it once and I think it was around 8 grand. The reason for the replacement was it broke the input shaft off the main rotor. Still don't know what cause it.
What brand did you buy?
It was a slug of liquid versus a stream, you may have done damage. Rotors can flex and contact the housing, shaft can break, typically near the face of the rotor.
If it is running normally now, you likely dodged the bullet & should be ok. They're surprisingly rugged.
If it is running normally now, you likely dodged the bullet & should be ok. They're surprisingly rugged.
txvwnut and Mooky.... I shut it down immediately so hopefully minimal damage. Today I started it up and let it run for a half hour or so to dry everything out and then shot a can of aerosol lube through it to avert any rust issues. It is a Vac-Con machine.... Thanks!
txvwnut
Well-known member
You bought the best in the business with that Vac-Con. I've been running/maitaining them for over 20 years. I've seen and demo'd a bunch of the other makes out there and none of them could compare. I'm good friends with my local dealer so if you have any problems getting parts let me know and I'll do what I can to give a hand.