Hi all,
I read on this board about DD LH and RH engine rotation. I have a MC5A. As I look into the engine compartment and look at the engine rcrank pulley (motor running)...is this the correct orientation to ID the rotation?
Thank you
--Mike
No rotation is looking from the rear
Looking at the front of the engine? As compared to the flywheel end?
make believe you are in the drivers seat and the motor is pointing the right way ;D
Only angle drive GM,Flxibles and probably some others used Left Hand engines. In buses, that is.
OK
Thanks
--Mike
Thank you. So you look at the flywheel end and if the engine runs in a clockwise direction, then it would be a right hand turning engine. One only looks at the rear, not the front.
Flywheel end.
Thank you
FolkBus; My first Crown Supercoach ride was way back in 1968. Bus number 30, a 1956 Crown with a 220 Hall Scott of unknown size. Spicer 5 speed manual. Would go about 56 at 2100 rpm. Starting gear was first and a little bit short. A whopping 3 miles per gallon. 10x20 tube tires on split rims. Long ago and far away. Kern High School District in central CA. :)
Right hand rotation is called that since the first cars had crank only starting. Since more people are right handed, the engines rotate clockwise when facing it making hand cranking easy. Good Luck, TomC
Quote from: TomC on October 04, 2015, 08:41:06 PM
Right hand rotation is called that since the first cars had crank only starting. Since more people are right handed, the engines rotate clockwise when facing it making hand cranking easy. Good Luck, TomC
huh ?
That's also why the handles on coffee cups are on the right hand side.
I always carry a left handed hammer in my tool box, you never know.
That is like the guy shingling house siding everyone now and then he would throw a nail away. The other guy asked him why he was doing that. He stated that they were pointing the wrong way and they were for the other side of the house.
OK, now. Y'all are gettin silly!
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. :)
The flywheel end
Got it. Just imagine I am the tranny or driveshaft. HB
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
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
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 ;D
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 ;D
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 ???
Mine had a Continental 4 cylinder F162 flat head engine with a up draft carburetor
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... ;D
LOL they sorta look like a model A Ford engine
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.
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
(http://engine.od.ua/ufiles/DETROIT-Model-Serial-number.pdf)
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.
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
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".
The wife's little 1972 Triumph manual uses the term "anti clockwise" I have other word I use when working on it
when you call the parts guy most times they ask for the engine serial number and then they tell you when they look it up. to me if the crank pulley turns clock wise then its clockwise. no 1 cylinder is almost always the front unless your dealing with perkins then you have to look, when you open the doors you are looking at the front of the motor. my manual says the flywheel end is the rear.