8v92 powered fire truck

[kwidd]

On Public Surplus fire truck wirh 8v92 silver.Auction #407572 - 1985 HAHN/BECK FIRE ENGINE

[Lonnie time to go]

fwiw


8V92 DETROIT DIESEL (RUNS, BUT NEEDS TO BE REBUILT)

[RickB]

That's awfully low hours for a well maintained engine to need rebuilding. I wonder if they really know what's wrong with it. It has the bypass blower might be a good core for one of you brave repowerer's out there at the very least.

What I like about fire engine detroit's is

#1 they are kept indoors so no "cold starts".
#2 they are driven hard like the designers intended
#3 maintenance on a machine where people's lives depend on them is really extreme

What I don't like about them and what probably negates some of the above statement is the time they spend idling. Does anybody know if they just hi idle when pumping or if they go to the wide open governed rpm?

That is a clean looking engine. It would be interesting to magnify the Diesel service placard on the valve cover, get the number , see if their still in business and if they know anything about this particular motor.

I actually hoped to find a lo mile fire truck for my repower at a good price but it never materialized.

Rick

[JackConrad]

Does anybody know if they just hi idle when pumping or if they go to the wide open governed rpm?
Rick

Pump RPM is well above idle, however, it is very rare that an engine spends all of the on scene time pumping. Much of the time is spent idling as well as all the on scene time on calls that do not require pumping such as EMS back-up.  Jack

[luvrbus]

Most of those are wide open when pumping Rick with the converter locked


good luck

[Busted Knuckle]

Most of those are wide open when pumping Rick with the converter locked
good luck

There you go again Clifford teaching me something I should have all ready known again!
I started to ask "What? Why would it be going through the converter? Why would an automatic transmission be involved when running the pump?"

But then it hit me like a Fire Truck! Ah duh, how else is it going to get to the PTO?

Ah, as one of my all time favorite punch lines to a joke goes, "AH, DUH.....   BIG RED TRUCK!"
 BK    (politically incorrect busnut! )

[RickB]

Hey guys,

If I remember right this is a manual transmission truck so how would they go about engaging the pump? A specific extra gear That disengages the transmisson or a PTO off the transmission. Just curious.

It doesn't seem like any of the aux drives would be capable of that kind of torque without breaking.

I'm all ears...

RB

[Don4107]

The pump is usually built into a unit similar to a transfer case.  When in pump mode the drive line is disconnected and the output pf the transmission is connected to the pump.  If a standard transmission then it is pumped in direct, that is normally 4th or 5th gear.   Newer automatic trans pumpers uses the computer to put the trans in the appropriate gear. The few engines our Dept has pump at relatively low RPM and power levels. 

Fire apparatus spends much time idling.  They also get abused by firing up and standing on the throttle cold.  And in our case, being a small rural Dept, thankfully, long periods of non-use.

[DaveG]

Lots of truck manual transmissions have a gear that runs a PTO that turns with the input shaft, so the trans can be in neutral and still run the PTO...is that the question?

[kwidd]

It says it has a four speed auto trans

[RickB]

Oooops. My bad. Well, I wonder what the thing will actually sell for? 8v92 and a 740. Sounds like a good possible repower rig. Spoken by the dude that is leaking money like a sieve on his own repower.  LOL

[gus]

Most reasonably new pumpers have AT. I have a '59 and a '70, both with AT.

[desi arnaz]

this may not work

[RickB]

It's disconnected...

Well, I'm not sure what I would've said anyways. "Hey, there is this fire truck and you used to work on it".

They probably would've hung up on me or more likely they did all the service for the bay area fire stations.


I hope it finds a good home.
Rick

[Don Fairchild]

you know if you bought that thing you qould have a good core engine and trans with a lot of scrap to recoupe your money.

Don