DD 8v71 rotation?

HB of CJ · October 05, 2015, 10:27:48 AM

So ... how does one look at an engine to determine handed ness? From the flywheel or clutch end ... or looking at the front of the engine? But then I confuse easily nowadays.

luvrbus · October 05, 2015, 10:36:23 AM

The flywheel end

HB of CJ · October 05, 2015, 03:15:39 PM

Got it. Just imagine I am the tranny or driveshaft. HB

TomC · October 05, 2015, 08:59:33 PM

A right handed engine rotates counter clockwise as viewed from the flywheel, so when viewed from the front is rotating clockwise-once again so originally hand cranking the engine was easier for right handed people. Don't believe me-look it up. Good Luck, TomC

eagle19952 · October 06, 2015, 07:00:24 AM

Quote from: TomC on October 05, 2015, 08:59:33 PM
A right handed engine rotates counter clockwise as viewed from the flywheel, so when viewed from the front is rotating clockwise-once again so originally hand cranking the engine was easier for right handed people. Don't believe me-look it up. Good Luck, TomC

ok

luvrbus · October 06, 2015, 07:14:09 AM

LOL on the old Lincoln 200 welder I had I did use the right foot I purchased it new in 1972 and came without a electric start only a hand crank when I sold still didn't have a starter,wonder what a welder would do now if it didn't have a button to push for starting

eagle19952 · October 06, 2015, 09:30:14 AM

Quote from: luvrbus on October 06, 2015, 07:14:09 AM
LOL on the old Lincoln 200 welder I had I did use the right foot I purchased it new in 1972 and came without a electric start only a hand crank when I sold still didn't have a starter,wonder what a welder would do now if it didn't have a button to push for starting

HAD one too. best little welder i ever struck an arc with..and never more than 3/4 of a crank to start.
iirc it had a Ford ind. motor.. crs has set in

... maybe it had a Continnetal

luvrbus · October 06, 2015, 09:41:28 AM

Mine had a Continental 4 cylinder F162 flat head engine with a up draft carburetor

eagle19952 · October 06, 2015, 09:43:41 AM

Quote from: luvrbus on October 06, 2015, 09:41:28 AM
Mine had a Continental 4 cylinder F162 flat head engine with a up draft carburetor

the flat head part was probably what had me thinking Ford...

luvrbus · October 06, 2015, 10:27:19 AM

LOL they sorta look like a model A Ford engine

HB of CJ · October 06, 2015, 10:43:39 AM

Sorry everybody, now I am confused again. A right handed engine turns clockwise from the front end .... or from looking at the flywheel end? I think it is from looking at the front end like in the hand cranking days. But ... I think I am getting opposite points of view here or it my be my old age and left handed ness

Written English can be so confusing.

eagle19952 · October 06, 2015, 11:27:59 AM

Quote from: HB of CJ on October 06, 2015, 10:43:39 AM
Sorry everybody, now I am confused again. A right handed engine turns clockwise from the front end .... or from looking at the flywheel end? I think it is from looking at the front end like in the hand cranking days. But ... I think I am getting opposite points of view here or it my be my old age and left handed ness Written English can be so confusing.

Further:
All HT740s in buses are RH rotation. Same as an OTR truck. A rule of thumb is that "T" drive coaches are all RH, and transverse mounted engines (V drive) in buses are mostly LH...maybe. Transverse DD S-50s are RH rotation.
Engines from Prevost, Eagle, MCI, Dina, and most modern coaches are all RH.
2 strokes in GM and Flxible are LH. No problem with the transverse trans...they used "V" drive transmissions...there's no mistaking V series with HT series transmissions.

Further:From Detroit Diesel:
Basic Engine Arrangements
Rotation: L (left) and R (right) designates rotation as viewed from the front of the engine.
Type: A-B-C-D designates location of starter and oil cooler as viewed from the rear of the engine.
Cylinder Banks: Left and right cylinder banks are determined from the rear of the engine.

Further: From DD
If the 5th digit in the serial number is 1-2-3-4, then as viewed from the flywheel end, the flywheel turns CW or RH
If the 5th digit in the serial number is 5-6-7-8, then as viewed from the flywheel end, the flywheel turns CCW or LH

Further:

http://engine.od.ua/ufiles/DETROIT-Model-Serial-number.pdf

azdieselman · October 06, 2015, 11:41:50 AM

I remember the first time someone said "anti-clockwise". I gave them a funny look, but it is used in some old books I have from the 20's and 30's.

Iceni John · October 06, 2015, 12:47:21 PM

Quote from: azdieselman on October 06, 2015, 11:41:50 AM
I remember the first time someone said "anti-clockwise". I gave them a funny look, but it is used in some old books I have from the 20's and 30's.

And for kids now only familiar with digital clocks, all this terminology is meaningless!

John

Oonrahnjay · October 06, 2015, 02:22:28 PM

Quote from: azdieselman on October 06, 2015, 11:41:50 AMI remember the first time someone said "anti-clockwise". I gave them a funny look, but it is used in some old books I have from the 20's and 30's.

When I worked over there in the 70-s through 00-s, it was standard technical usage (and also pretty much standard ordinary day-to-day usage) in Britain. I'm guessing it still is. People were mystified if I'd mistakenly say "counter clockwise".