Air Opporated Fuel Pump???

[Joe Camper]

Someone want to elaborate on this some. Never heard of it. The bus in question is a 96 chassis with a 60 series.

Here is what I was sent

"Don't know if you heard or not but Bob came to my house last night with his wife to pick up the bus to take it to get the list completed. He made it about 25 miles and the bus stopped running. He called me and thought it was dirty fuel filters and have Prevost road service coming out to rescue him.
Unfortunately it was not the filters. Prevost told him it was computer related and he needed Detroit Diesel. Bob then called them and they came out and said it was the main air compressor that failed causing the air operated fuel pump to shut down. By this time it was 1 am and it needed towed.
I called the good sam club and they sent a wrecker. However since there was no air in the system they could not get under it to tow it.
The detroit diesel technician then figured out a way to get air in the system but another wrecker had to be dispatched. This didn't happen until 8am.
They finally got it towed to detroit diesel in Tampa.
Bob and his wife finally made it home by 10am.
I must tell you that Bob is remarkable. He is simply a blessing. I do not know what i would have done thus far without him.
I hope things start to turn around for this bus and my experience with it gets better.
It has been a nightmare for me thus far. If you are spiritual, say a prayer that this will get better.
If you are not, please pray to the Prevost gods for the same.
I will let you know what happens from here.
Hopefully this will not bankrupt me."

[Just Dallas]

On the 60, the fuel pump isn't actually operated by air, it is operated through the back of the compressor, so when the compressor fails, the fuel pump can also.

$600 for  new compressor plus what ever else got damaged by the compressor locking up.

[luvrbus]

Sounds to me like he is talking about the EGR but on a 1996 model never saw that before

[stevet903]

I was scratching my head on what this one looked like - a picture is worth a thousand words....

http://www.ddcsn.com/cps/rde/xbcr/ddcsn/18SP607Rev2.pdf

[luvrbus]

His fuel pump is driven off the air compressor if the compressor shears a key he is dead in the water


good luck

[Joe Camper]

The owner is new and green to the hobby.

Thanks everyone I should have made the connection (incorrect one) with the suggestion it was air powered.

I know its driven off the compressor.

This is an engine with 22000 miles on it. The DD tech also pulled the total hrs off the computer and they were in line with the miles.

Its been my experience some of the Bendix compressors will go an eternity others wont go a year. I had 1,100,000 on a 3406B with the original compressor and it never spit a drip of oil to the tanks. A friend I parked with with another Pete with a Cummins went through 2 in half the miles.

So happy that did not occur while I was driving it

Nothing like having a total unrelated failure to a bus someone has left for something else. Then try to explain it to an owner that understands very little about anything. I hate when that happens LOL

[luvrbus]

Wasn't the ideal setup Joe most of the time when they lost a drive coupling or sheared a key on the compressor it was in downtown Dallas at 5PM been there lol

good luck