Cummins V378?

chipped tooth · Apr 9, 2017

My 1977 Michigan 55B has an Cummins V378.
I'm looking for the engine serial number.
Anyone know the location or could post pics of where the serial number is on a V378?

Rolitto · Apr 11, 2017

Welcome!
First of all, glad to hear you own a Michigan 55. Do you have pictures of it?
As for the engine's data plate, it's located on the bottom right side, next to pulley belts.

chipped tooth · Apr 11, 2017

Ok, do you have any pictures of the area?
Mine is a bit rusty and it's hard to make out the entire set.
How many numbers are there supposed to be?

Rolitto · Apr 11, 2017

Here's an attachment. Is your machine a Michigan 55 or a Clark 55B? You can tell from the back, if there's a nameplate on the grille or on top of the hood.

chipped tooth · Apr 11, 2017

It says Clark above the grill.
Michigan on the hood.

Thank you! I'll go check for that plate.

Rolitto · Apr 11, 2017

Some engine dataplate could be located on the lower right bank of the crankcase i.e. somewhere underneath the exhaust manifolds.

Rolitto · Apr 11, 2017

chipped tooth said:
It says Clark above the grill.
Michigan on the hood.

Thank you! I'll go check for that plate.

You're welcome. So your machine is a Clark 55B.
Both Clark and Michigan belong to Clark Equipment Co., the main difference though are in nameplates and colors (wheel hubs, grille's nameplate, and other decals are in blue for Michigan).

chipped tooth · Apr 11, 2017

Well I just went and looked.
All that's left of my data plate is 3 rivets with the corner pieces leftover.....

Any chance the number would be in another place?

I'm planning on rebuilding the engine, and it seems to order correct parts I need the serial number.
Even though it runs excellent I build engine's for a living so having fresh stuff is pretty normal around my place.

Rolitto · Apr 11, 2017

I cannot tell if your dataplate is missing or has been ripped off previously. I guess a good cleaning would show you more if there's an engine dataplate and therefore you'll get the chance to know if it's still readable or not.

Rolitto · Apr 11, 2017

chipped tooth said:
Well I just went and looked.
All that's left of my data plate is 3 rivets with the corner pieces leftover.....

Any chance the number would be in another place?

I'm planning on rebuilding the engine, and it seems to order correct parts I need the serial number.
Even though it runs excellent I build engine's for a living so having fresh stuff is pretty normal around my place.

Do you think a Cummins V-378-C is better than the alternative choice of a Detroit Diesel 4-53N on a Clark 55B?

chipped tooth · Apr 11, 2017

Hear is a pic of what's left of my data plate.

old-iron-habit · Apr 11, 2017

I don't know for sure about loaders but on Clark skidders of that era they stamped a matching machine number in the frame toward the outside above the articulation joint. I think the right side as sitting on the seat and on the forward half. Mind might be fuzzy so check both sides front and back of the center pin. They were like a 1/2" tall numbers and fairly easy to see if the area is not covered in grease.

EDIT: On the skidder the frames are a bit different as you sit on the front half instead of the rear so look around.

chipped tooth · Apr 11, 2017

Yes that's the loader serial number.
I need the engine serial number.

There is a pad on the right side by the crankshaft pulley just above the oil pan that has a number stamped into it.... It's hard to read due to rust...
I'll get pics tomorrow and maybe that is the engine serial number.
The Cummins tech I talked to maybe a year ago claimed the serial/engine number is stamped in numerous areas for production reasons....
I was hoping to find said stamped numbers in an easier to read spot.

Rolitto · Apr 12, 2017

chipped tooth said:
Hear is a pic of what's left of my data plate.View attachment 167647

It's removed like I guessed. If you're lucky enough, it could be bolted elsewhere i.e. near pulleys.

kshansen · Apr 12, 2017

Rolitto said:
Do you think a Cummins V-378-C is better than the alternative choice of a Detroit Diesel 4-53N on a Clark 55B?

Well I have no experience with the little Cummins engines, but I'd say for parts availability it would be hard to beat an old Detroit. They were used in just about anything one could imagine that needed something to turn, from a water pump to wheels on a tractor.

chipped tooth · Dec 12, 2017

Little update on my V378 parts.

My data plate was missing so I used the PromTehServis parts list for small cam V378.

I used those part numbers and orderd everything from Globalpartszone.com
I did sleeves, pistons, rings, upper gasket set, rod and main bearings to do an in frame build.
I also rebuilt the heads, I can do this all in house cause I run an engine machine shop.

She has twice the power now!

Word of caution, don't use the V555 head torque specs.
Use V378/V504 specs.

Anyone need more info on what I did just hit me up!

DB2 · Dec 13, 2017

Contemplating rebuilding a V 504 right now. I am also debating a repower with a Detroit.
I'm leaning toward the latter. Never had much luck with the Cummins V engines.

chipped tooth · Dec 13, 2017

I like the power of the V series.
Thinking about adding a turbo but since the freshen up it definitely doesn't need any more power!
It was strong before but having a few turbos laying around and a machine shop in house got me thinking.
No plans of it as of now, Probably never will.

Jeremy Linjdstrom · Nov 15, 2022

Good afternoon everyone ... new to the forms but was hoping you guys might have some info i need. im working on a 1982 Champion Road Grader and cant find the rocker arm tourqe specs and the sequince to tighten the 4 bolts down. also was wondering if there was a specific direction the injectors should be installed? Another mechanic pulled it apart and left. the motor is a Cummins V-378-C manufacter date of 7/82. The ESN is scrached right at the begining of the numbers and i dont see a plate where you guys have described in this post. Thanks for any help!

Welder Dave · Nov 16, 2022

This is an old thread from 2017 and the people involved haven't been on the forum in over a year.

Cummins V378?

Active Member

Well-Known Member

Active Member

Well-Known Member

Attachments

Active Member

Well-Known Member

Well-Known Member

Attachments

Active Member

Well-Known Member

Well-Known Member

Active Member

Senior Member

Active Member

Well-Known Member

Senior Member

Active Member

Senior Member

Active Member

New Member

Senior Member