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cam gear instalation?

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Old 03-27-2008 | 05:51 PM
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somis13
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cam gear instalation?
how is the drive gear on the cam shaft held in place? is it pressed on? is their a key way? should I replace the gear when replacing the cam?
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Old 03-27-2008 | 06:25 PM
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Yes it is pressed on, and yes there is a keyway. I see no reason to replace the cam gear.
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Old 03-27-2008 | 06:37 PM
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Pressed on, keywayed.
You can also heat the gear up to 400-450' and itll fall right on.
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Old 03-27-2008 | 08:06 PM
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If your putting a performance cam in, you might wanna think about a bolt on cam gear if your planning on any high rpm work, especially with a p-pump.
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Old 03-28-2008 | 12:17 AM
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Originally Posted by Troutstrannysvc
Pressed on, keywayed.
You can also heat the gear up to 400-450' and itll fall right on.
Yes, and if you over heat it (more then Cummins spec, as you are suggesting) it may just fall right off!
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Old 03-28-2008 | 03:06 AM
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It might not be too good for the heat treat, eh?
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Old 03-28-2008 | 05:40 AM
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Be careful heating gears. But, it's an easy process.

As mentioned, if you are changing the cam, might want to consider that bolt on gear.

I have pressed a few off and on. Also heated a couple. I prefer the press, but you have to be careful.

Dave
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Old 03-28-2008 | 07:35 AM
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Originally Posted by thekidfan
Yes, and if you over heat it (more then Cummins spec, as you are suggesting) it may just fall right off!
I doubt it'll go anywhere from the retainer I have holding it on...
And Greg Houge who designed the Max Spool cam said to take it to that.
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Old 03-28-2008 | 11:00 AM
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who makes a cam that requires a bolt on gear?
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Old 03-28-2008 | 11:28 AM
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MaxSpool, and Helix camshafts
Greg Houge and Don M. Greg makes Max Spool, Helix's are from Don
Shcieds too...
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Old 03-28-2008 | 12:11 PM
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Originally Posted by somis13
who makes a cam that requires a bolt on gear?
Scheid makes them both ways.
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Old 03-28-2008 | 12:49 PM
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Helix Cam Shaft


MaxSpool

I went w/ the Max Spool due to availability more than anything.
They aren't producing Helix's as far as I know for a little while they just sold the last one out of the batch not to long ago IIRC.

MaxSpool is a regrind, Helix is not.
Scheid can make both ways I think, I'm pretty positive John_P is running a cam from them.

Originally Posted by Don M
Wait for the 8620 SAE gas-carburized, Billet Steel cams. Should be ready in a month or so. Super strong, hard as hell lobes ( 60+ rockwell ) and basically unbreakable. Pricing is very competitive. No bushings need to be installed in the block. Direct drop in. Will run on stock tappets as well. No billet tappets needed.

:rockwoot:
<--- Don M.

hope this helps
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Old 03-28-2008 | 03:36 PM
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Originally Posted by Troutstrannysvc
I doubt it'll go anywhere from the retainer I have holding it on...
And Greg Houge who designed the Max Spool cam said to take it to that.
I have not seen the retainer that his cam uses, but keep in mind a part that is designed to have a press fit should retain that even with a bolt.

There is a procedure offered in the Cummins factory manual and I would recommend anyone doing this defer to the proper procedure for your truck. It just eliminates a potential issue.


Dave
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Old 03-28-2008 | 09:53 PM
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Originally Posted by Troutstrannysvc
Scheid can make both ways I think, I'm pretty positive John_P is running a cam from them.
Yup, me too.
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Old 03-29-2008 | 07:18 AM
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Cummins shop manual 3810206-02 page 1-32 "heat the camshaft gear in a preheated oven at 149* C (300* F) for 45 minutes. The oven should never exceed 177* C (350* F) or the gear will be permanently distorted. From the boys who built it
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