Engine/Transmission (1994 - 1998) another kdp method

[dlefebvre]

I was recently at Alberta Cummins in Edmonton enquiring about the tab available from cummins. I should have wrote down the cummins part number and had it on hand. They looked and looked for it in the computer. They knew what I was talking about but the service manager said that a center punch was used to peen around the dowel hole. Thats how they have repaired this problem in the past. What do you guys think of this method? Yey or ney?



Dean

 

[illflem]

If you have enough room go for it. A 98¢ washer and removing one bolt may be less work though. I'm sure Cummins has a reason for offering the tab washer and a bulletin on how to contain the pin using the washer. Cummins dealers can be much like the Dodge dealer and get fixed on doing a repair a certain way ignoring the current way that Cummins recommends.

 

[redram]

That's exactly how I "secured" my pin.



While having the front of the truck apart repairing the A/C clutch (removed the radiator for better access for the snap rings holding the A/C clutch) I removed the front cover. My pin had not moved adn I verified this by 'setting' the pin with a punch, comparing before / after depth relative to the housing surface.



The tab / washer held in by the bolt is no better / worse than the pin coming out as the bolt could back out and the washer and bolt fall into the timing gears.



I chose the old proven method of preening the hole to present a restricted path for the pin to work out of. Is it fool proof? Nothing is, but it's one less bolted item that could work it's way out of the front of the housing into the gears.



This is actually a fairly common method of securing items in round holes - freeze plugs for one.



Should work fine assuming that the pin fit to hole is snug to begin with.

 

[Ncostello]

Cummins does make its very own tab indeed... nice little round washer looking one with two ears sticking out. There was a link around here once that had the part number and some photos along with a Cummins Bulletin write-up on the problem



Cummins also recommended staking the dowel hole with a punch for those gear housings that had the bossed pin hole. The tab wont work on these. They recommended tapping the tab back into place good, cleaning the hole with compressed air, and applying some wicking type loc-tite. Then you "stake" the hole wall with a punch. There is really no way it can come out then. Although the dowel bore is not a good press fit. . its still close enough for a punch mark to make falling out practically impossible. Doing a good staking job however is the critical part. Loctite should really prevent movement also.



This was just what I remember reading.



EDIT: It was a post by R. EBEL I think with hyperlink to the Northwest Bombers Forum... its a dead link now so I cant put it in here.

 

[The patriot]

I did the clean & wicking loc-tite, then I tabbed it.

I would have used the jig (especially since I already had posession of it anyway) but I was taking the front cover off to do the seal anyhow.

Eric



BTW This was on the (properly valved)98 and it didnt budge at all in the 90K miles I drove it up until the time I did this.

 

[B9Mile]

Here is the link to the NW Bombers thread on this.

http://www.nwbombers.com/cgi-bin/forum/ikonboard.cgi?;act=ST;f=3;t=790;hl=kdp+info



Looks like the pictures didn't survive the change-over to the new server.



I copied them way back when this was an active thread.



The part # for the Cummins tab is 3958017. Its called a tabbed washer.

 

[B9Mile]

The Tab Installed

The Tab Installed

 

[Dieselnerd]

Strange how Cummins has developed a "Tab" for a problem they have always claimed doesn't exist. I remember a couple of years ago many of us were writing Cummins and asking about the KDP problem and we all got the same letter back saying the problem was so small we didn't need to be concerned. They also said in the letter that if we were concerned we should apply some wicking loctite.

 

[dlefebvre]

thanks B9Mile

Thanks for the number, now I can go back to cummins



Dean

 

[rrl989]

Originally posted by Dieselnerd

Strange how Cummins has developed a "Tab" for a problem they have always claimed doesn't exist. I remember a couple of years ago many of us were writing Cummins and asking about the KDP problem and we all got the same letter back saying the problem was so small we didn't need to be concerned. They also said in the letter that if we were concerned we should apply some wicking loctite.

Shows us what a joke the 16,000 TDR members are in the eyes of Cummins. Yes, I got the same response from them regarding the defect. Amazing how it is no longer a defect after 100K miles ?



Ron