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Deere 401-B won't start when hot

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Kevin Rifenburg

05-23-2006 13:29:39




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Hello all. I have been digging through this site to find an answer for this, so forgive me if I have missed it. Here goes.

Tractor specs:
JD401B Serial Number from plate under seat:
JD401BD 338103T

Numbers from motor:
4219DT 01513439T

RoosaMaster Injector pump
DBGFC431-?- 2DH 2500RPM
Pump Serial # 811790

My dad bought this tractor in March. The guy he bought it from repainted it and said he had changed the injector pump.

The tractor had been hard to start even in 65-70 degree weather. It takes ether to get it to go. After it does start, it runs smooth and has plenty of power. If you shut it off or if it kills, it will not start without cooling off first.

I checked the batteries and cleaned the battery posts. We took the starter off and took it to get rebuilt the guy said it wasn't working correctly. He rebuilt it. We put it on today and the tractor started easily within 5 seconds. We killed it and tried it again and it fired right up. We ran the bushhog on the tractor for about an hour without any problems.

My fater dismounted to talk to me with the tractor running and the loader has a slow leak and the boom lifted all the way up and killed the tractor. We dropped the loader and tried to start but it would only crank with no attempt to run. The starter seems to be turning the motor fast enough, but there is no puffs of smoke coming from the stack.

He is about to give up on this Deere, which is his first ever. He had 2 IHC on his old farm and thought he was ready to retire so he sold the farm and the tractors. He misses the outdoors so he bought some land and wanted to play.

We changed the fuel filter last week and we cracked the fuel line from the mechanical fuel pump and it is pumping fine. I have no experience with the injector pump but I suspect that it is not pumping when the engine is hot. The engine never dies unless dad gets the tractor hung or it bogs down on a hill and dies.

I haven't had a chance to check with anyone local, because this sounds like it should be something simple to fix. Any help will be appreciated. I will put some pics on the web so people interested can see it. Thanks.

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Kevin Rifenburg

05-24-2006 19:48:07




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 Re: Deere 401-B won't start when hot in reply to Kevin Rifenburg, 05-23-2006 13:29:39  
Hello again and thanks for the responses. Here is an update. I think there is a different problem this time.

I cranked the engine today when it was cool and it didn't start. I gave it a shot of ether and it fired until it burned it up.

Can you give me some insight on how the injector pump works?

Could the shaft that spins the pump have broke?

I took the return line loose and then removed the fitting. There was no signs of black particles. The clear check ball moved freely.

Good or bad, I took the 3 screws from the top of the pump off to see inside where there was some springs attached to the throttle link It was clean inside there. No crud or black pieces.

I reinstalled the checkball fitting and the return hose and checked the inlet line again from the filter while cranking and the fuel is pumping to the injector pump.

Is is difficult to re-time the engine and pump after removing an injector pump? I might be up for removal and replacement, but I know I won't be able to rebuild the pump.

Thanks again for the replies.

http://www.pcassistant.net/deere.shtml

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Glen in TX

05-25-2006 09:20:40




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 Re: Deere 401-B won't start when hot in reply to Kevin Rifenburg, 05-24-2006 19:48:07  
I think your 401B would have the JD 219 engine. Same as in a 2520 and few other JDs. It won't be hard to set timing and remove pump for repairs and testing. The engine has a timing cover hole you insert a pin in to get it on #1 TDC. You can remove and install without putting it on TDC but then you won't be able to check and adjust timing when reinstalling either and will end up putting it on TDC to retime anyway. A I&T JD-33 shop manual for 2510 & 2520 would cover the 219 engine or a JD service manual also. I&T manuals are available on this sites parts or from several other tractor parts vendors. JD manuals available from JD tech pubs 800-522-7448 http://techpubs.deere.com or JD industrial site.

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LarrySTN

05-23-2006 20:01:05




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 Re: Deere 401-B won't start when hot in reply to Kevin Rifenburg, 05-23-2006 13:29:39  
Kevin, remove the return line from the pump and remove the fitting from the pump that the return line is connected to. This fitting should have a check valve in it. If there are black particles in this fitting the flex ring is bad in the pump and should be replaced. With the hot starting problem you describe though I suspect that the hydraulic head in the pump is bad and would require a pump rebuild. When a hydraulic head gets worn the first sympton is hard "hot" starting. If this is true, a liberal amount of automatic transmission fluid in the diesel fuel might allow the pump to hot start because the fluid it is pumping is thicker and will not leak past the pumping plungers as quickly. This will only be a temporary fix at best.

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Roy Suomi

05-23-2006 19:55:07




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 Re: Deere 401-B won't start when hot in reply to Kevin Rifenburg, 05-23-2006 13:29:39  
You said the former owner changed the injector pump...I wonder if he changed it out with a "good" pump or a rebuilt one.. Many "good" ones are in the eyes of the beholder and may not be worth the writing on the Stanadyne Roosamaster I.D. tag.. It sounds as if the clearances are excessive internally causing poor or no start when hot...Try screwing the hydraulic pump de-stroking handle down..This is the small "T" handle thats located on the top of the hydraulic pump front cover..Turn it down till you feel some resistance then another turn..This will put your hydraulic pump out of stroke when you're trying to start the engine..This will allow the engine to turnover without trying to pump oil and drag the starter down...

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Glen in TX

05-23-2006 18:31:36




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 Re: Deere 401-B won't start when hot in reply to Kevin Rifenburg, 05-23-2006 13:29:39  
Check the tank and injector return lines for pieces of plastic inside and crud. Some of those Roosa Master pumps had a plastic piece that may be getting warm and coming apart in pump?



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