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200 valve lash adjustment?
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DIESEL View Drop Down
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Joined: 26 Aug 2013
Location: Sandhills
Points: 259 		Post Options Post Options   Thanks (0) Thanks(0)   Quote DIESEL Quote  Post ReplyReply Direct Link To This Post Topic: 200 valve lash adjustment?
    Posted: 02 Oct 2016 at 5:12pm
This summer while in the hay field my 200 developed a rattle, which I assumed was an out of adjustment valve. The next day the tractor started to knock as soon as it was started, it sounded like it had a dead cylinder so we parked it. 
I just removed the valve cover and found that the set screw had come loose on #3 intake and allowed the rod to lay over to the side. I pulled the pushrod out, and looked it over and everything seems fine, it's straight and not roughed up at all. 
 What I'm wondering now is what will keep this screw from coming loose when I adjust it to specs. I can move the screw with my fingers and it seems tight so I don't think the threads are messed up in the rocker arm.  I'm no mechanic but I thought it would have a jamb nut on it.
All advice would be greatly appreciated, Thanks! 
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MACK View Drop Down
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Joined: 17 Nov 2009
Points: 7664 		Post Options Post Options   Thanks (0) Thanks(0)   Quote MACK Quote  Post ReplyReply Direct Link To This Post Posted: 02 Oct 2016 at 6:02pm
Replace the rocker and screw or rough the threads on screw and it might stay in place.    MACK
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DrAllis View Drop Down
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Points: 22110 		Post Options Post Options   Thanks (0) Thanks(0)   Quote DrAllis Quote  Post ReplyReply Direct Link To This Post Posted: 02 Oct 2016 at 7:25pm
Take a 3/8" fine thread nut and hack saw it in half (top to bottom) and use it on the underside of the rocker arm for a lock. There's usually enough threads on the bottom of the adjusting screw to be able to do this. Quick, easy and effective.
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LeonR2013 View Drop Down
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Joined: 01 Jan 2013
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Points: 3500 		Post Options Post Options   Thanks (0) Thanks(0)   Quote LeonR2013 Quote  Post ReplyReply Direct Link To This Post Posted: 02 Oct 2016 at 11:54pm
Ace hardware here in town keeps thin jam nuts in stock. If you have one close to you they may have them too. If not get out your hacksaw.
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Joined: 26 Aug 2013
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Points: 259 		Post Options Post Options   Thanks (0) Thanks(0)   Quote DIESEL Quote  Post ReplyReply Direct Link To This Post Posted: 07 Oct 2016 at 11:18pm
Thank's for the help guy's, she purrs like a kitten again. 
Doc your jamb nut worked perfectlyWink, Fastenal had just what I needed!!
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