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Update: Golden Jubilee Won't Run

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Bobby in SC

04-15-2006 07:17:25




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Posted a message on 4-13-06 concerning what was believed to be stuck pistons on 53 jubilee. Went to my friends house and blew out the tranny fluid in number 2,3 and 4 cylinders that he had put in each cylinder to free up the rings if that was the problem. Still would not crank but, would still run on #1 cylinder. Took off the side panel exposing push rods. Rods for #1 cylinder were moving but, none of the others were moving or even acted like they wanted to move. Have not taken gas tank off yet, to expose the valves. What is he likely in for, a broken cam or lifter problems? Don't want to tear into this tractor unless necessary. Any help appreciated.

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RodInNS

04-16-2006 14:42:37




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 Re: Update: Golden Jubilee Won't Run in reply to Bobby in SC, 04-15-2006 07:17:25  
As I read things, it would seem like the cam is broken after #1 cylinder.

Rod



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Jerry/MT

04-15-2006 14:28:27




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 Re: Update: Golden Jubilee Won't Run in reply to Bobby in SC, 04-15-2006 07:17:25  
I agree with old. I think your cam is broken behind the #1 set of pushrods. If the cam was good you'd see some pushrod motion and maybe have some bent pushrods. Stuck valves usually have a problem with the "return to closed position" since they are mechanically forced open by the rocker arm/pushrod forces generated by the cam lobes. The valve return spring force is what causes them to close and if it's inadequate due to contamination, they hold open.

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Ricky in NC

04-15-2006 13:59:04




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 Re: Update: Golden Jubilee Won't Run in reply to Bobby in SC, 04-15-2006 07:17:25  
Sounds to me like stuck valves. If the cam shaft is broken the timing gears may not work and engine would not do anything. If the tachometer or proof meter connects to the rear of the cam shaft and it works the cam shaft should not be broken. Oil pressure should not build or distributor would not turn. I suggest removing the valve cover and turn the engine over then report what you see.



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old

04-16-2006 07:59:19




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 Re: Update: Golden Jubilee Won't Run in reply to Ricky in NC, 04-15-2006 13:59:04  
Think about it. He says #1 cylinder runs but none of the others do. The cm shaft can be broken just behind the disturtor shaft. The cam shaft runs off the crank shaft and is driven from the forunt back so again #1 can run if the cam is broken behind the disturtor. Even with stuck valves the push rods will move of bend. He said he has the side cover off so he could see the push rods and he says they don't move. Only thing it can be is a brokne cam. Unless the head is so gummed up that the push rods will not fall back down to the cam shaft. Again gravity no matter what will make the rods stay down on the cam even if the valves are stuck.

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Bobby in SC

04-15-2006 13:38:52




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 Re: Update: Golden Jubilee Won't Run in reply to Bobby in SC, 04-15-2006 07:17:25  
Thanks for the helpful advice. I will double check everything including the rockers. Thanks again.



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old

04-15-2006 07:49:22




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 Re: Update: Golden Jubilee Won't Run in reply to Bobby in SC, 04-15-2006 07:17:25  
Well if the push rods don't move any at all then about the only thing it could be is the cam is broken. Now if they move a little bit then it could be lifters if that engine even has them. You might try holding down on each push rod and have some one turn the engine over just to make sure that they don't move any. They could also have fallen out ot the rockeds so there no push down on them

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~~HB~~ in NC

04-15-2006 08:16:43




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 Re: Update: Golden Jubilee Won't Run in reply to old, 04-15-2006 07:49:22  
Hi Bobby,

You probably have stuck valves.

~~HB~~ in NC



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old

04-15-2006 08:36:10




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 Re: Update: Golden Jubilee Won't Run in reply to ~~HB~~ in NC, 04-15-2006 08:16:43  
Even if the vlaves where stuck the push rods would either move or bend but either way the push rods would move.



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john in la

04-16-2006 05:45:24




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 Re: Update: Golden Jubilee Won't Run in reply to old, 04-15-2006 08:36:10  
Not if the engine is gummed up. The springs on the valves is what supplies the pressure to push the push rods back down. If the valves are stuck open the push rods could easily be stuck in the up position.

I vote for stuck valves are broken valve springs.



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old

04-16-2006 07:46:17




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 Re: Update: Golden Jubilee Won't Run in reply to john in la, 04-16-2006 05:45:24  
Think about it. The push rods sit on the cam shaft, if the cam is turning the push rods will move no matter what. He siad he took the side cover off so hae would see the push rods. The only way the push rod will not move is if the cam is broken. The valve could be stuck but the push rod would still move or like I said bend.

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john in la

04-16-2006 15:53:58




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 Re: Update: Golden Jubilee Won't Run in reply to old, 04-16-2006 07:46:17  
Yes Think about it.

If the valve is stuck open or the valve return spring is broken the cam would turn to the high side and push the push rod up. With no spring pressure to push the push rod back down as the cam turns to the low side and a little of gum in the motor the push rods would stay in the up position and not move when looked at through the side panel.

The cam could be broke but I do not think so because..... ..... ..... .
His distributor is turning but #2 valves are not. The gear for the dist. is in between the #1 and #2 cylinder. If the cam were to break just behind the dist. gear and before the #2 cylinder valves the cam would fall out of align and not turn because the journal and bearing are behind the #2 cylinder.

Just my opinion

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old

04-16-2006 15:58:14




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 Re: Update: Golden Jubilee Won't Run in reply to john in la, 04-16-2006 15:53:58  
I agree if the push rod is gummed up it might sit there and not move but I have never seen that much gum in a push rod hole. Shoot most push rod holes around about a 1/2 inch and the push rod is like 1/4 inch thats just plain a lot of gum. And if theres that much gum it has major problems all over.

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