Another Killer Dowel Pin On The Move

[R.ebel]

Finally convinced one of my hunting buddies (John) that he needed to deal with his KDP. After we got the gearcase cover removed, I showed John were the KDP was located and that it had moved forward 1/4" out of its intended position His eyes were as big as saucers as he looked at the gears and then the location of the proudly protruding KDP then mumbled something about needing a beer We were able to drive the KDP home so it was flush with the gearcase and secured it with a KDP blocking tab



Oh for the record, Johns truck is a '94 with 110,000 miles on the odometer.

 

[Joe G.]

ATTABOY!

Good job! Has he decided to join us yet?

 

[baby.driver]

THAT has got to be a load off his mind!!



Jay

 

[GMcLean]

he was pretty lucky, hope he had a couple of beer cause he can afford it with the $$$ he save not having it come out.

I justed joined the tdr a few months ago and received issue 33 and started reading the story of the dreaded dowel pin concern, the next day I had a customer come in with a massive oil leak at the front of his cummins engine. Boy was this coinsidence or what!!! It turned out to be the dowel pin. . a month later another one of his fleet did the exact same thing. . he blamed it on me reading on it

 

[MikeR]

GMcLean,



Since you are in the diesel biz, you should look into buying the killer dowel pin jig tool from CPFF. It could bring you good work while saving your customers' engines.



We (some NW Bombers) did 5 dowel pin kills in one morning last week. It's a real slick tool and simle job. Thankfully none of the dowel pins had moved (whew!).



-Mike

 

[Dave Remillard]

MikeR Sounds like you and others had a productive day on the KDP's. I'm curious how to tell if the dowel pin has moved when using the jig. I will probably do the fix that Joe G. used, but may change my mind if I can be certain the pin hasn't yet moved. Thanks

 

[illflem]

Like Mike said the jig is a slick well thought out tool . There is a stop built into the drill bit, if you can't get it in to the stop the pin has moved. You can continue with the fix all the way except for putting in the containment bolt since it will hit the side of the pin. The NW jig kit includes (or did) a shorter bolt that allows you to seal the hole until you have the parts and time to remove the cover and pound the pin back in. You can then add the longer bolt to keep the pin from moving. After performing 30+ jig fixes myself I have only found two pins that have moved, both were '97s. Watch out '97 owners!!! Of the 45+ other folks that have used the NW jig none have reported a pin that has moved. It is possible, but not likely, that a pin has come out all the way and is laying in the bottom of the pan without causing damage. If you ever have seen the tight clearances inside the cover you will see that it is close to impossible for this to happen without doing damage along the way.

 

[Gray 5.9]

Illflem,

How many 94's have you found where the KDP has moved, and damaged? How common is it for the first year second generation cummins to have this problem? THANKS

 

[illflem]

I've only found the two '97s that had moved, but there have been reports of KDP damage on 2nd gen rigs up 97 and some 1st gen, not sure of the years. It seems like more folks who have done the tab fix have found the pin starting out, hard to say if it would have come out all the way though. Even if the pin has started out a little the jig fix will stop it. Not sure of the exact number but I've done at least five '94s, none had moved.

 

[Gray 5.9]

Thanks, Illflem

I think I'll Just tap a hole where the Illistrations show, and put a 3/4 long bolt there with some red loctite, just above the cover plate bolt, down from the lower right bolt of the fan bracket bolt.

 

[illflem]

Emerald, I wish it was as easy as you make it sound. The location and angle of the hole is very critical. The drill bit enters the case at a pretty steep angle, think you would have a very hard time keeping the bit from walking all over without a jig. You will also need a 12" long bit in order to avoid taking the front of the engine off and still getting the hole in the right place. You will also need a 12" long countersink, the bolt has to be set in to avoid other parts. The jig kit has all of this plus a 12" long handled tap with a guide to tap straight. Sure you don't just want to wait for the jig or do the tab fix? I think you would be better off.

 

[Joe G.]

Emerald5. 9,



If you do it by hand you really have no idea that the screw is where it should be. Even if you use the jig, you still don't know if the screws that fasten the gear case to the block are tight. With the jig you can block the pin. With the tab fix you can inspect the whole thing, drive the pin back in if necessary, block the pin, and secure any other loose screws. If you want some info on how to do the tab fix e-mail me at -- email address removed -- . Otherwise wait until you can get access to a jig. If you decide to run a screw straight thru the case cover there is not enuff metal in it to make any threads because it's really just heavy sheet metal. This whole deal is a non-trivial job.

 

[illflem]

Which one Joe?



triv·i·al (trv-l)

adj.

1)Of little significance or value.

2)Ordinary; commonplace.

3)Concerned with or involving trivia.

4)Mathematics.

a)Of, relating to, or being the solution of an equation in which every variable is equal to zero.

b)Of, relating to, or being the simplest possible case; self-evident.

 

[Joe G.]

4b. Actually, the definition has drifted a little in usage in the computer programming racket. A non-trivial job is a job that takes some hard work. Not something that can just be knocked off easy. I tend to drop into jargin without realizing I do it sometimes. When I mix computereeze with commercial fisherman speak it gets a bit confusing to say the least.

 

[LarryB]

When I mix computereeze with commercial fisherman speak it gets a bit confusing to say the least.

Yea, like "NET" work!

 

[RJ2]

Still looking for someone with KDP experience in central fla. I would like to get some paperwork on both methods and give them to Southeast diesel here in Daytona .

Thanks RJ

 

[Dfuruness]

I own a 95, should I be concerned? Anyone out there with a 95 do the fix and notice that the dowel moved?



My beast just turned 173,800 miles...





Don

 

[Joe G.]

The KDP has failed for all years of the 12 valve engines with the P7100 pump. That naturally includes '95 models.

 

[illflem]

Joe, I could be mistaken but read here that Cummins introduced a new cover that keeps the pin in in late '97, so some '97s and all '98 12 valves are immune.

 

[Northrunner]

'98 12 valvers immune?

Illflem,

About your comment concerning the '98 12 valve trucks being immune to the KDP... are you sure about that? My truck is that year and model, mfg date of 8/97 in Canada.



Thanks,

Mike