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4230 Oil Pump Gear

G

greenmachine

Member
So finally got all my other equipment ready for harvest, was hoping to start beans early this week but has been raining. Figured I would get back to the 4230. Pulled the tach cover and the gears are sharp, but not to the point where it will cut you. The gear on the cam looks good. Feels like an 1/8 inch of play in the gears from what I can tell by turning the oil pump gear. Is that to much? Could a guy just change the oil pump gear.. Kinda looks like a pita. But would rather do it now than overhaul another motor! Thanks!
 
Yes you can change the oil pump gear, but it sounds like it may be okay for a long time, you can check it from time to time "IF" you remember it. Back when they first had some trouble with them wearing to soon Deere wanted us to check and monitor the wear, re-placing them if they progressed to a certain point,,we went ahead and changed them if they showed much wear at all, figured to do it while Deere was still paying the bill.
 
I was looking for mine all I can find is the part that goes over the gear, the gauge part is missing...Darn it
 
You can see that it is worn some, just wasnt sure if an 1/8 inch was to much play or not.. How hard would it be to just change the oil pump gear? Like I said I cant see much of any wear on the cam side. Thanks!
 
Well the early ones were the bad ones, they did something to improve them in 1975 or 76. to change the shaft gear drop the pan and remove the by-pass manifold and the 2 bolts holding the pump in, wiggle and pull it down out(this all sounds easier than it is)disassemble the pump and press the gears of,,when pressing the pump end gear(the lower one) you need to be careful, you can"t just press the shaft out, the woodruff key will not go through the housing, I press a bit then slip a couple of 3/8 nuts under the gear then press some more. There is no timing involved. You will look like a spotted pup when your done, those darn things will bleed oil for a week,,I"m gonna look that way after bit, I"m in-framing a 4020 today,,got an old shirt on.....
 
Pulled the oil pump, should of looked at it when I had it out the first time to but bearings in the bottom end. Gear doesnt really look that bad, its worn some but not what i would consider bad. I guess if I am going to do the oil pump gear should probably do the cam, doesnt make sense to do just the one, to me anyways.. But I guess I havent seen one new, so I dont know how to guage the wear..
 
I'm guessing from what you told me you will be okay to run it, if they were a bad one they failed early on, yours has lived this long it should last a while longer. It's a major job to change the cam but your right, should change them both when you do it. too bad we didn't talk a bit while you were in there, Darn it....
 
Now that I have it apart the cam looks more worn than the oil pump.. I am starting to think maybe they put a new oil pump gear in this tractor.. I cant remember but I had it back to Deere in the mid 70's and they had it open for something.. Looks like work to get the cam out, guessing the fuel tank has to come off?! Should of just pulled the motor at this point, live an learn!
 
If your going to change it in frame I unbolt the pump frame from the engine, remove the lines and pipes and roll the side frames and fuel tank forward on the front wheels. This leaves the timing cover exposed and room to pull the cam, you will need that "fancy magnetic cam follower tool kit to hold the followers up so the cam will come out, they don't work so well, if one drops down a bit it holds the cam from coming out, you can push them up from the bottom with a long screw driver, but an aggravation to do. When I do them it's usually when I'm out of frame and I roll them over and let gravity hold them....it keeps the oil out of your eye too...
 
Okay thats what I was thinking.. Not sure if I want to tackle it, but the cam gear has me worried. Once it breaks I would imagine you have no warning..
 
I caught one of our 4230's back in the 80's that way, unfortunately I was side dressing 28% and had just filled the saddle tanks...Darn it. Your gonna worry about it so there is only one way to settle it.....
 
One of the greater improvements Deere made on the Waterloo 6cyls was the crank shaft driven oil pump, they are easier to install and "much" more efficient. Unfortunately they can not be re-fitted into an older block.....
 
Ordered a new cam, includes tappets, new oil pump shaft.. Wasnt really priced that badly, just gonna be the time to pull it apart farther.. Luckly I dont use this tractor really, so no rush.. Better safe than sorry for the little money it will cost.. Will have to take this tractor to the grave w/ me.. Should of traded it in when I bought another 8xxx series tractor this spring! Oh well..
 
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