Author Topic: 8V71 "C"  (Read 1669 times)

Offline lvmci

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8V71 "C"
« on: May 07, 2013, 09:13:50 PM »
Hi All, ran across someone talking about an early 70s DD 8V71 "C", don't know a C, can anybody tell me what a C is and its horsepower or what ever makes it different, lvmci...
MCI 102C3 8V92, Allison HT740
Formally MCI5A 8V71 Allison MT643

Offline wg4t50

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Re: 8V71 "C"
« Reply #1 on: May 07, 2013, 11:38:02 PM »
Geez, knowing how many versions of setups are capable with the 71 series and knowing the parts manuals alone stack about 3 ft high.  Lets see, trying to recall they had/have A, B,C & D setups, which end of block is flywheel, and what rotation used, I must be nuts but seem to recall they are listed as LA,LB, RC, RD or something like  that, just too many years ago for this fuzzy head, surly someone can say it right.  Just being a C engine I am guessing.
FWIW
Dave M
MCI7 20+ Yrs
Foretravel w/ISM500
WG4T CW for ever.
Central Virginia

Offline bevans6

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  • 1980 MCI MC-5C
Re: 8V71 "C"
« Reply #2 on: May 08, 2013, 04:01:21 AM »
A B C D designates the location of the starter motor and oil cooler as viewed from the rear of the engine.  A "C" engine is a typical MCI setup with the starter on the upper left side (passenger side) and the oil cooler on the right (driver's) side.  It can be right or left hand rotation to get an LC or an RC.

Brian
1980 MCI MC-5C, 8V-71T from a M-110 self propelled howitzer
Allison MT-647
Tatamagouche, Nova Scotia

Offline lvmci

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Re: 8V71 "C"
« Reply #3 on: May 08, 2013, 06:16:21 AM »
Thanks guys, the design engineers must of had a field day over at Detroit Diesel with this engine group, lvmci...
MCI 102C3 8V92, Allison HT740
Formally MCI5A 8V71 Allison MT643

Offline HB of CJ

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Seventy Five Years Old And Doing Fine!
« Reply #4 on: May 09, 2013, 07:17:14 PM »
Yep; the old, (but NOT forgotten) DD could be configured up in many strange ways.  How about trannies at both ends..along with two clutches?  How about a marine tranny on one end and a big generator on the other?   Or...the oil platform special which I saw once.  A mighty DD standing on its end with a big alternator on top...or bottom.

Our old fire apparatus had DD's with two, (2) starters...seems one was not good enough.  Or pancake models, (80 degrees on left side) with a very flat top and bottom...thus its nickname.  Crown Supercoach schoolies used a lot of those; also marine.  Sportfisher yacht guests couldn't figure out where the mills were.  HB of CJ (old coot) :)