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4230 Oil Pump Gear

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greenmachine
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PostPosted: Wed Sep 28, 2011 9:45 am    Post subject: 4230 Oil Pump Gear Reply to specific post Reply with quote

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!
 
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tim s
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PostPosted: Wed Sep 28, 2011 10:43 am    Post subject: Re: 4230 Oil Pump Gear Reply to specific post Reply with quote

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.
 
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DONMYEIL
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PostPosted: Wed Sep 28, 2011 10:47 am    Post subject: Re: 4230 Oil Pump Gear Reply to specific post Reply with quote

Your dealer should have a tool to gauge the wear.
 
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tim s
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PostPosted: Wed Sep 28, 2011 10:52 am    Post subject: Re: 4230 Oil Pump Gear Reply to specific post Reply with quote

I was looking for mine all I can find is the part that goes over the gear, the gauge part is missing...Darn it
 
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greenmachine
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PostPosted: Wed Sep 28, 2011 10:58 am    Post subject: Re: 4230 Oil Pump Gear Reply to specific post Reply with quote

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!
 
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greenmachine
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PostPosted: Wed Sep 28, 2011 10:59 am    Post subject: Re: 4230 Oil Pump Gear Reply to specific post Reply with quote

Dont know if it matters but this is an early build first year 4230. Thanks!
 
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tim s
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PostPosted: Wed Sep 28, 2011 11:38 am    Post subject: Re: 4230 Oil Pump Gear Reply to specific post Reply with quote

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.....
 
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greenmachine
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PostPosted: Wed Sep 28, 2011 11:57 am    Post subject: Re: 4230 Oil Pump Gear Reply to specific post Reply with quote

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..
 
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tim s
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PostPosted: Wed Sep 28, 2011 12:06 pm    Post subject: Re: 4230 Oil Pump Gear Reply to specific post Reply with quote

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....
 
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greenmachine
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PostPosted: Wed Sep 28, 2011 12:07 pm    Post subject: Re: 4230 Oil Pump Gear Reply to specific post Reply with quote

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!
 
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tim s
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PostPosted: Wed Sep 28, 2011 12:22 pm    Post subject: Re: 4230 Oil Pump Gear Reply to specific post Reply with quote

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...
 
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greenmachine
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PostPosted: Wed Sep 28, 2011 1:59 pm    Post subject: Re: 4230 Oil Pump Gear Reply to specific post Reply with quote

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..
 
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tim s
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PostPosted: Wed Sep 28, 2011 2:48 pm    Post subject: Re: 4230 Oil Pump Gear Reply to specific post Reply with quote

The only warning is the tach will stop...
 
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greenmachine
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PostPosted: Wed Sep 28, 2011 3:37 pm    Post subject: Re: 4230 Oil Pump Gear Reply to specific post Reply with quote

Problem is by the time you see it, probably to late.. Really on the fence with what to do..
 
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tim s
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PostPosted: Wed Sep 28, 2011 4:03 pm    Post subject: Re: 4230 Oil Pump Gear Reply to specific post Reply with quote

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.....
 
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