Need timing help, keep breaking pushrods, CAT 3406

Will take a look and report back with photos. Thanks again!

 

Front cover is off and this is what there is to see. There is the letter 'K' engraved into the cam gear(visible near 03:00) but that is the only mark that I can really make out. The engine is set at #1TDC in these photos:







I read and reread the manual that I have for this motor and it says nothing about timing the gear train.

 

That's exactly what I was doing. I spun the motor over by hand with a bar checking for interference and found it. I learned that lesson the hard way many years ago with an old Jeep, now I guess I know why.

 

No dots on the crank or idler gears which is what has me confused.

 

Just got off the phone with the CAT technical service adviser and this is what I'm told:

Normally there are "V" marks on the crank gear and large idler gear as well as two "K" marks on the cam gear. The "V" on the crank gear sits at 12:00 while the "V" on the large idler gear sits at 06:00 and the two "K" marks on the cam gear sit at about 11:00 and 07:00 or just barely outside the outer edges of the large idler gear.

I'm going to go try this and see what happens. I posted the technique in hopes that it will help somebody else out down the road who's having the same issues. I'll try and get a photo posted once it's done correctly.

Thanks again for all the help guys!

 

Here's the finished product:



If you look close you can see the "K" marks on the cam gear. Turns out there were "V" marks on the idler gear and crank gear but they were covered over with several layers of old paint and grease pen.

 

It's supposed to be a B or C but we're not sure, there's no identifying marks on the block like a serial #. The serial # KW gave us comes back to a C but CAT says that same number comes back to a B so who really knows. I ended up going thru it again after I took the photo and got it lined up better. Fuel pump timing is next, should be easy with the timing pin. I guess we'll see.