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4010 diesel runs fast a start up

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Richard J. Sche

06-02-2003 12:35:29




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Just fixed the front end of the 4010 standard and now a new problem is starting. When I first start the tractor in park it will acelerate real fast to high rpms untill I puch the trothle handle all the way up and bring it down then it will idle at what position the handle is in at the time. As I use the tractor all seems to be ok . The dealer told me the problem is the injection pump. What do all you deere owners think it is. The tractor is a diesel. It does this when cold or hot every time.

Richard

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John

06-02-2003 19:10:06




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 Re: 4010 diesel runs fast a start up in reply to Richard J. Scherr, 06-02-2003 12:35:29  
It's the governor assembly in the Roosa Master pump. I'd pull the pump and injectors to have them rebuilt/recalibrated. Most fuel problems are from lots of hours or contaminated fuel/lack of proper maintenance.



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jdemaris

06-02-2003 18:20:17




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 Re: 4010 diesel runs fast a start up in reply to Richard J. Scherr, 06-02-2003 12:35:29  
I don't know if you have the Roosa Master CB or the DB/JDB injection pump; both were used. One is round and the other is larger and has a retangular cover bolted to it with three srcews. The round CB pump does NOT have a plastic weight-retainer ring in the governor as the other respondent mentioned. It does have a rack and pinion gear set that operates the throttle and tends to wear out. It can be replaced without removing the pump. If you have the DB or JDB pump, and it hasn't been updated, then it would have a plastic weight retainer ring that serves as a vibration dampener in the governor assembly. These rings get brittle and shatter. When this happens your governor will still work, just gets a little sloppy - but just a broken ring will not let it fly away or reach higher RPMs than specified. There are several prolems, though that can or will result. One: little pieces of the shattered ring get stuck in the return-fuel fitting or check valve (where the return fuel line hooks to the pump). When this plugs the tractor with act like it's starving for fuel and/or quit. Two: If the tractor is run for a long time after the ring is completely gone, there will be a set of steel rivets that will keep hammering against each other until some metal flakes off and passes through the pump. Once that happens the pump could get trashed to the point where it's not repairable. With the pump off it's about an hours work install a new ring and seal kit. There is also an updated weight-retainer assembly that does not use ANY ring and therefore won't ever come apart again. All depends on what you want to spend. A seal kit that comes with a new original style ring is around $45. In addition, the updated retainer is probably another $50. I assume you've ruled out the obvious, like checked or observed your throttle linkage and made sure that your fuel filter isn't getting full of air?

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JDBert

06-02-2003 15:45:43




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 Re: 4010 diesel runs fast a start up in reply to Richard J. Scherr, 06-02-2003 12:35:29  
Ricahrd,
The govenorband is going bad in the injection pump. This should be fixed or you can have a run away.



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neighbor's 4840 injection

06-03-2003 10:32:09




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 Re: Re: 4010 diesel runs fast a start up in reply to JDBert, 06-02-2003 15:45:43  
Blew the motor to kingdom come.



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Richard J. Scherr

06-03-2003 05:14:41




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 Re: Re: 4010 diesel runs fast a start up in reply to JDBert, 06-02-2003 15:45:43  
Thanks for the help. The dealer told me he could get at it in about a week or so. I will not be using the tractor in the mean time. It has the round pump on it. Any idea at the cost of the repair?

Richard



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jdemaris

06-03-2003 19:04:02




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 Re: Re: Re: 4010 diesel runs fast a start up in reply to Richard J. Scherr, 06-03-2003 05:14:41  
I just noticed your comment about having the round injection pump - a Roosa Master CB I assume. As I mentioned earlier, it doe NOT have the plastic ring in it that others' have mentioned. I belive the rack and pinion gears that operate the throttle are still available and can be replaced without removing the pump. That model pump was declared obsolete back in the late 70s when many new parts for it became unavailable. John Deere was selling kits to change the setup over to the other pump style. I recall installing a kit on a 2520 back in 1980 and the parts cost over $1300. I'd hate to think what the kit cost now.

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John

06-03-2003 10:50:32




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 Re: Re: Re: 4010 diesel runs fast a start up in reply to Richard J. Scherr, 06-03-2003 05:14:41  
For a pump rebuild, It will cost ~$600 for this style one. Liek I say, it's expensive but if you keep tractor maintenance up and maintain the fuel as you should, it very rarely happens.

John



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jdemaris

06-03-2003 18:46:21




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 Re: Re: Re: Re: 4010 diesel runs fast a start up in reply to John, 06-03-2003 10:50:32  
I've got to disagree with you about the weight retaining rings rarely failing with proper maintenance. I'm speaking of the DB or JDB pumps since the Roosa Master CBs don't use the rings. I worked for a JD dealer close to 30 years and those plastic rings failed very often, some in machines that were treated poorly and in some that were babied and highy maintained. These plastic weight-retainer rings got special attention in 1979. This was because Chevrolet, Cadillac, and Oldsmobile were using the Roosa Master pumps in the new (and very bad) 350 diesels in pickups and cars. The rings were shattering left and right. For a while, we were fixing the pumps at our John Deere dealership for a nearby Chevy dealer. First Roosa Master/Stanadyne came up with a new material for the ring that was supposed to be more durable. Finally they came up with a whole new design and eliminated the ring altogether. As far as cost goes, I realize that the average price for a rebuilt pump (if it does not need a head and rotor) is around $600. If a pump and/or tractor has not been abused, a pump can often be fixed for about $50 in parts. It takes about an hour on the bench. I've done many on site or out in the woods. The Roosa Master DB and JDB pumps have two weak spots that fail early and need attention - the governor weight retainer ring and the housing fuel pressure regulator. The parts to fix both come in the Roosa Master $45 seal/repair kit. One mention about the smaller Roosa Master CB pump that was sometimes used instead of the DB. It was smaller and simpler, did not have the plastic ring to fail, yet became obsolete back in the 70s. John Deere and Roosa Master discontinued most parts for it, yet I know of a number of tractors still running with these pumps and have never been apart. My neighbor's 4020 has over 30,000 hours on it and three engine rebuilds but the little CB pump is still a virgin.

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