Cummins L10

[Ross]

I need some specifications on the Cummins L-10. Is it still in production? How many cylinders, displacement, output, applications, etc... . ????



I'm looking at a medium duty truck that has this engine, and I don't know anything about it.



Any info is appreciated.

 

[speedracer]

L-10

The cummins L10 is a 10 liter inline 6 diesel. Output would vary with specification just like most diesel motors. I think its used primarily in 2 axle tractors and 2-3 axle straight trucks, plus whatever offroad applications. I'm pretty sure it's still in production in revised ISL form. (just like the 5. 9B became the ISB)

 

[JAK]

Yes, it is still in production. You can check outcummins for more info. I believe it has the compression release braking instead of exhaust braking. speedracer pretty much covered everything else.

 

[BCFAST]

Not positive on that one...

I dont think they make it anymore, as it was supersceded by the M11 Electronic motor. Basically, the L10 is just the next step up from 5. 9, 8. 3... etc. Seen them in lots of dump trucks. They're a little thirsty with short gears.

 

[jddaniel]

Also were used in Versatile 846/876 4wd farm tractors. LT-10 was rated at 230hp, 748ft-lb. LTA-10 was rated at 280hp, 895ft-lb (1990 numbers). Superceded by the M11, which is still offered today. Decent numbers compared to the top offering at the time, Cummins NTA-855 rated at 360hp, 1150ft-lb.

 

[Ross]

L-10

It's in a 1994 Navistar 8300 with an allison 5-speed. It's rated at 300 hp, but I don't know the torque. I would guess it somewhere around 1000 ft lbs. I'm primarily concerned with expected life (miles to 1st overhaul), whether it is sleeved, etc. , etc. I have a lot of initial confidence in it just because it's a cummins.

 

[JAK]

You could also call 1-800-DIESELS (1-800-343-7357). It's the Cummins Customer Assistance Center. It is open Monday through Friday, 7 am - 7pm Eastern Standard Time (EST). Whenever I've called they seemed very willing to provide whatever info they have.

 

[Wayne M.]

Ross, we have plenty of L10's and M11's in our fleet. They are good engines and do take abuse. I would have a reputable Cummins mechanic check it out good if it has more than 8000 Hours on it. They are wet sleeved and the L uses the PT fuel system.

The PT system is basically a pump which controls fuel to rocker actuated injectors. Cummins has used this system for many years and runs well. The pump does not distrubute fuel to each injector in the manner we are used to seeing in our B's, just controls flow.

 

[Bill Stockard]

Ross,



I sold quite a few L10s while I was a heavy duty truck salesman. The are very reliable, durable engines. The truck you describe, was probably used as a "city tractor" making delivers in a metro area. With the Allison behind it, it should last a long time. I've had customers put 1. 000. 000 miles on them with regular maintenance. The only objection to the L10 is that it won't hold the hills like a N14 with an 80,000 load(it's not as big an engine with as much torque). The L10 was used in weight sensitive(approx 700 lbs lighter tahn a N14) applications, dump trucks, mixer trucks, liquid tankers, etc.



Years ago, we had a L10 towed in the shop in a mixer truck that had been run without coolant(driver didn't want to walk). The cylinder head had been so overheated that some of the freeze plugs had fallen out of it. We replaced the freeze plugs, head gasket(didn't need one, but replaced it to be safe), replaced the radiator hose(cause of failure), filled it back up with coolant and put the truck back in service and the customer ran it for several years!!! Now that's one tough engine!!!!



Bill