[highfive]

Howdy, just a post for the heck of it.

I was over at my uncles this weekend and he has a log skidder that had an interesting motor I had not seen before it was a cummins v8 with an odd fuel setup I couldn't really tell how it was feeding the engine looked like it ran off of a rear cover driven pump tag said 470C but haven't seen any info on it.

Anyone have any tidbits?

 

[Dr.Evil]

Probably a 555 Cummins....The one in the ready-mix truck I drove was naturally aspirated and rated @ 208 HP....I think at something like 2600 rpm, 555 cid of course They also made a bigger one, a 903....several versions from about 270 hp N/A up to 320 or 350 hp turbocharged for truck use. Military equipment uses quite a few of them in different applications. Not a real bad engine....just thirsty.

 

[grounder]

The 903 was one of my Favorite Cummins mills.You could really make em run without a Lot of work and They held up well Turned up.

 

[rmr]

Cummins also made the V470 and V504, and the V-300

 

[mudguppy]

the only two current (i think) applications that the military uses the 903 for is:

1) MLRS track ~500hp

2) M2/M3 Bradleys - 600hp, and they really scoot, too. /ubbthreads/images/graemlins/vulnerable.gif


those are the only two i can remember seeing (i can only speak for Army). i think they used to use the 903s in some of the larger trucks way back when, but most everything's DD 8v92 now.

 

[rvannatta]

[ QUOTE ]
Cummins also made the V470 and V504, and the V-300

[/ QUOTE ]

Most of the Cummins log skidder engines were the smaller ones you
mention instead of the tripple nickle. I think we had a Garrett 30
with the cummins.

We have also had some V-300's around. This was a military engine
retrofitted into the M123A1 10 ton truck in the Vietnam war era.

Often mistaken for a 903, it is really a 785 cu in. that produced
300 hp and 3000 RPM and would usually wrap to 3200. I've owned a bunch of them and blown up a bunch of them. You can't even get a gasket for one from cummins these days, but I have several dead ones sitting around here that will go to the scrap iron yard soon if some one has a passion of a pile of cast iron that doesn't work.

 

[highfive]

Thanks for the history fella's.

I am guessing it was a v470 then due to the tag and your info.

Yes, this is a garrett skidder too. Sounds like they were made to wind up a little, too bad parts are sketchy would like to see the 470 with a good sized turbo retroed on there and see what they do. Didn't physically look too complicated or much bigger than a 7.3 psd.

Any ideas on fuel/injector setup on it? did they use a setup like a DD? or something particular to it.
thanks again.

 

[tlm47201]

I have done testing for the last 9 years on the V-903. Currently, remanned and new are supplied in 295, 500, 525, 600, and 660 hp, versions from marine boat to amphibious assault vehicles. Just finished testing a 675 hp uprate, build an 800 hp test mule, and on PT fuel systems have built over 1000 hp on the dyno. Sweet engines to be sure.

 

[rvannatta]

[ QUOTE ]
Thanks for the history fella's.

I am guessing it was a v470 then due to the tag and your info.

Yes, this is a garrett skidder too. Sounds like they were made to wind up a little, too bad parts are sketchy would like to see the 470 with a good sized turbo retroed on there and see what they do. Didn't physically look too complicated or much bigger than a 7.3 psd.

Any ideas on fuel/injector setup on it? did they use a setup like a DD? or something particular to it.
thanks again.

[/ QUOTE ]

Nothing is set up like a DD. The fuel system in the 2 cycle detroits
was straight out of the 1930's and not copied by anyone.

The cummins PT system became standard on most cummins after WWII
(they had a bit different system before the war). Certain the V-300 had a PT pump system, but it is possible that those small block cummins v8's had a Bosch pump,
I just don't remember.

We got an old Garrett with weeds growing up around it behind
the barn so I guess I could go look

The problem with Garrett was that they had only one design.
They started out with a fairly small skidder with a modest engine. then the horse power race in skidders hit and they followed along adding progressivly more powerful engines. Unfortunately the only thing they scaled up was the engine. We had a Garrett 30--- the most powerful they made the valve covers hung out from under the dinky engine housing on both sides and it snapped drive lines so regularly that we carried an extra one under the seat with the tools to change it so we didn't have to walk back to the landing.

Axles weren't much different. We had a friend who got tired of having problems betting the broken piece of the drive axle out so he developed a sling so he could pick the skidder up and turn it on its side and bang it on the ground to help the broken piece of axle fall out. He said it took about 15 minutes compared to having to take the differential out to get out the broken piece.