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Cummins M11 help


steeler
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I know it's not a Mack question but one got a M11 that somebody has installed the accessory drive out of time.

How the heck do you time this thing? There is a rubber plug that allows you to see the idler and cam gear teeth, and I'm figuring that if I roll the engine around enough, eventually these will line up, but I've turned this thing till I have blisters on my hands and still haven't got alignment.

I found the "v" mark for timing the accessory drive, and I can put it together lined up, but shouldn't the crank/cam/accessory drive marks all be lined up at the same time?

 

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If it is the same as the N14 this is the specs.

The crank gear has one timing mark that is aligned to cam gear which has two marks.....and cam gear has two different marks one is for crank gear to cam........and other is for cam to accessory drive.  It will only line up one way. Have crank gear at 12 o'clock position the cam gear will have two marks one will be at 6 o'clock position to align with crank and other will be around 2 o'clock position to align with accessory drive.
 Hope it helps.
 

"OPERTUNITY IS MISSED BY MOST PEOPLE BECAUSE IT IS DRESSED IN OVERALLS AND LOOKS LIKE WORK"  Thomas Edison

 “Life’s journey is not to arrive at the grave safely, in a well preserved body, but rather to skid in sideways, totally worn out, shouting ‘Holy shit, what a ride!’

P.T.CHESHIRE

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11 minutes ago, 41chevy said:

If it is the same as the N14 this is the specs.

The crank gear has one timing mark that is aligned to cam gear which has two marks.....and cam gear has two different marks one is for crank gear to cam........and other is for cam to accessory drive.  It will only line up one way. Have crank gear at 12 o'clock position the cam gear will have two marks one will be at 6 o'clock position to align with crank and other will be around 2 o'clock position to align with accessory drive.
 Hope it helps.
 

Yup, this has an idler gear that mates with the crank/cam/and accessory drive. But apparently it takes 900 thousand revolutions before the marks line up. I don't know if there is an easier way to go about it.

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Probably not, at least with my luck.

"OPERTUNITY IS MISSED BY MOST PEOPLE BECAUSE IT IS DRESSED IN OVERALLS AND LOOKS LIKE WORK"  Thomas Edison

 “Life’s journey is not to arrive at the grave safely, in a well preserved body, but rather to skid in sideways, totally worn out, shouting ‘Holy shit, what a ride!’

P.T.CHESHIRE

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