Hi All,
I have taken a few more pics of one of the pieces,it looks like part of a cup from somewhere,i have measured roughly the size it would be,i'm hoping someone might be able to work out where it has come from and maybe determine if the associated pieces come from the same area.I have checked all the gears i can see and no sign of damage.The balancer-oil pump shaft coupler has had a bad hit maybe causing the circlip to come off and also breaking the balancer thrust washer maybe.I will have another good look this weekend but do also need to get the oilpan back on as the dozer is outside and the underside of the motor is only covered by a tarp. Luckily all fine weather for the next few days.
I am also wondering what stops the balancer gear drive moving too much apart from the bronze thrust washer which i thought would wear really quick being a soft metal,
cheers John.

Hi Team,
nothing like being able to eyeball the failed metal from all angles ----sure looks like it could be the pushrod ball end cup out of a failed lifter--as someone noted above, OR the valve rocker end cup out of a pushrod--maybe these ends are too small in diameter for that 7/8" dia. you drew ??.

Possible scenario of failure process :- if either one came loose and dropped into the balancer weight pan it would get thrown out with force into the rotating crank assembly and maybe then ricochet into the coupler.
Cheers,
Eddie B.

7/8? maybe top of the cam follower?

pull valve cover and see rockers and push rods look and see if they are adjusted right

Hi All,thanks for everyones input,i'll definitely take the rocker covers off to see if anything has gone astray and make sure everythings as it should be.I will be having a busy weekend,i am keen to find where all the broken parts come from before i put the oil pan back on.It could be a costly mistake to rush to get it going before finding out where the pieces come from.My gaskets and bell pump filter should be at the cat dealer by tomorrow,i even ordered a crankshaft pulley wrench to make it easier to turn the motor over by hand,not sure of any other ways to do it,then i can check all the gears and see if its turning over as it should.The hood looks heavy,i might just see if i can get the rocker covers off first and if any damaged parts then take the hood off.
What started by just replacing the oil pan then finding a broken thrust washer and thinking alls good until i find more pieces of metal is'nt a good feeling,it seems like i have spent more time under the dozer than driving it,such is life,
cheers John.

Hi Team,
sometimes I have removed the rear hood bolts and (from memory) front clamps, and lifted each end in turn up onto a suitable block/blocks of wood to gain a few inches for some elbow room under the hood for valve lash adjustment--1 block central at the rear and two--one either side of centre at the wider front--seemed to work.
Safety First--- You do not have to remove the exhaust pipe doing this as it is a Safety feature to stop the hood escaping from a gust of wind for example.
Cheers,
Eddie B.

Thanks for the tip to lift the hood up Eddie,i'll see how i go tomorrow.I got my parts from westrac today and the ring or circlip for the balancer coupler doesn't match the clip i found in the bell filter even though the clip is missing from the balancer coupler.
I think it is part of a circlip and the 90 degree end bit has broken off on one side making it look similar to a coupler circlip.The gauge is also a lot smaller than the proper coupler circlip.
I'll see how i go tomorrow,finding where all these bits have come from makes putting the oil pan on seem really easy.
cheers John.

If the 90° part of retaining ring is broke slide that coupler off to 1 side and then the other and look at both shafts chances are you might have major spline wear or or other possibility is when your thrust went out it got violent on the end of that shaft alittle

Hi All,
iv'e been flat out working a couple of long days so have'nt had too much time tell my progress on my D7e.I am not sure why my balancer thrust washer decided to break apart but looking at the coupler and shaft something has hit it with force and maybe like you said Cdcompton the thrust washer had a rough time and decided to break.The new coupler circlip or ring did not match the one i found in the bell pump filter so not sure where that come from.
So over the weekend i had a bit of progress,i got a new coupler circlip on and a new oil pump bell filter installed,i then took the rocker covers off,everything is intact and looks right apart from the heavy corrosion in there.Somehow water has got in there big time so plan to clean the head gear up next weekend.When i bought the dozer there was plenty of oil in it (well i thought there was)unstarted but when i checked when started and warm was practically dry apart from a little bit of murky water/oil showing on the dipstick.Even the dipstick was corroding.Since then i have done an oil change and had plenty of oil in it since, so i say the moisture was from lack of oil at one stage and water coming in from the exhaust.
Anyway i will clean the head gear as much as i can next weekend.On Sunday i put the oil pan back on and it just did not want to go on easy like the first time,maybe the 38 degree celcius heat did'nt help but got it on at the end including the rear sump joining impossible bolts to get on so should be all good.
cheers John.

Hi Team,
from the sludge and rust up in the top end there, one possibility is that the engine is running cold due to part stuck open thermostats.
Easy enough to check whilst you have the bonnet swinging up there.
Running with part stuck open thermostats is sure fire way to overheat the cooling system and possibly crack heads in hot weather.

Other place for water ingress is humidity, short running without allowing the engine to reach operating temp and burn off any condensation.
Also ensure that the nuts holding the rocker covers on are nylock/sealed type to seal on the threads and so stop pressure wash water ingress.
Also check the nut faces are square and flat on the bottom and not tearing up the aluminium faces of the rocker box washers--if the surfaces look dodgy you could put some fiber washers between the nut and washer.
Cheers,
Eddie B.