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Old 05-17-2009, 06:47 AM   #1
Gillig8V71
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Why Was the Cummins 555 Not Popular?

Hi,

Why was the Cummins V-555 line not so popular?

My theories are that these engines, which include the VTF-555, were an outgrowth of the V-470 (VINE) and the V-504 diesel engines, all of which are undersquare (with a 4-5/8" bore, the V-470 having a 3-1/2" stroke, the V-504 a 3-3/4" stroke and the V-555 a 4-1/8" stroke).

Here is a video of a VTF-555 in action as a retrofit engine in a 1952 American LaFrance fire engine:

~Ben
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Old 05-18-2009, 01:18 PM   #2
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i have a few theroy's. first it wasnt that good an engine. cummins [i read this in a cummins qouted article] did little to push it's smaller v engines, and really did not believe the v was a good design for a diesel platform. they believed in the inline design, and did indeed have issues with their v engines. also the 505 555 and other v engines came into a market [medium trucks] that was dominated by gas engines. gas engine's were easier to maintain,replace,and were proven. now the tabels have turned, and the diesels dominate, but the inline is the configuration of choice. personally i like the v engine's, the 3208 was one of my favorites. it was also the best of the medium v8's back in the day. now the only v8 is the 444e[7.3] or the 365[6.0]. personally i'am a big fan of the 7.3, but in the end, i prefer my trucks to be 466 powered. my old man had a triple nickle[555] back in the late 70's. it was in a tandem international dump, ran it a few years and had no issues.
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Old 05-18-2009, 05:13 PM   #3
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Why was the Cummins V-555 line not so popular?

It was the worst of all of Cummins' V8s, we called them 'cripple fives' here. You name it, if failed. The V-903, VT-903 & VT-300/320/350 enjoyed a good following in Australia even though they weren't that great either. As a general rule, V8 diesels are limited by their lack of main bearings compared to straight 6 diesels. Even the mightiest Mack V8 topped out at 610HP before it reached it's limit & the Cat 3408 didn't even get that far.
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Old 05-18-2009, 06:22 PM   #4
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the VTA-903T's in the M2/M3 Bradley's are running at 600 hp...
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Old 05-18-2009, 10:07 PM   #5
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L'autre raison pourquoi le nickel triple triple c'est-à-dire cinq moteur ils exécute vraiment l'assez haut tr-min et ils avaient vraiment une certaine question avec le comportement ce que j'ai entendu.

Le cinq moteur triple est ok à moi rien ne s'imagine(a envie de) à côté de peu de bizarreries avec cela.

The other reason why the triple nickel aka triple five motor they do run pretty high rpm and they did have some issue with bearing what I heard.

The triple five motor is ok to me nothing fancy beside few quirks with it.

Merci,Marc
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Old 05-19-2009, 03:00 AM   #6
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Quote:
Originally Posted by 6V-92TTA View Post
Why was the Cummins V-555 line not so popular?

It was the worst of all of Cummins' V8s, we called them 'cripple fives' here. You name it, if failed. The V-903, VT-903 & VT-300/320/350 enjoyed a good following in Australia even though they weren't that great either. As a general rule, V8 diesels are limited by their lack of main bearings compared to straight 6 diesels. Even the mightiest Mack V8 topped out at 610HP before it reached it's limit & the Cat 3408 didn't even get that far.
you got a point, but. remember the v8 engines back in the day ruled the road, as compared to what 6cyl engines that were available. as time went by,the inlines were being built to turn out more power, and with a cheaper cost to produce, and repair, it just made sense to go that route on otr trucks. as for main bearing numbers, thats a good point as well. again consider this, the inline has to have the extra bearing's due to the torsinal stress on the crank[ because it's much longer.] the most important thing to remember about mains,and other bearings is not so much as the number of them, but the size of them also. wider bearings carry loads with less stress. not directing this at anyone inparticular, but it makes me chuckle everytime i hear someone say a inline will last a lot longer then a v design engine. spend some time in the mineing industry as well as the gas well industry, and one can plainly see that the v's hold up very well for lot's of hrs.
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Old 05-19-2009, 09:35 AM   #7
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We have one in our versatile, and have yet to have any trouble out of it, it actually runs pretty good.
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Old 05-19-2009, 12:28 PM   #8
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I worked a linkbelt crane back in the 80's with a 555 and 13 speed. It grossed 58,000 lbs. down the road. Top end was 65 mph. If you hit a hill you tried to grab at least 2 gears to maintain some speed. It did do good for the stationary work it usually did on the job sights. It spent a lot of time maxed out on rpm's pouring concrete or slinging iron. I think we overhualed it once.
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Old 06-08-2009, 01:00 AM   #9
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A fair number of them were used in ag applications. Big A floaters and farm tractors as 2.

My uncle had 2 555 Series 3 Versatile 4wd tractors with the 555 Cummins. Still owns the first one he bought. Other went up in a VERY nasty oil fire when a hyd line blew oil on the exhaust manifold. His Big A also had a 555 Cummins, backed by an Allison MT540, IIRC.
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Old 06-09-2009, 01:26 AM   #10
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555

iv heard they were not a well balanced engine,hence wouldnt stay together long
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