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Valve Housing Rocker Arm Assembly

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Bill(Tx)

11-07-1999 19:33:38




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What would the best method to clean up a valve housing and rocker arm assembly on C-123 up to C-284 engines when a rebuild isn't called for just yet? Would kerosene or Marvel work okay? Would the loosened crud find their way into the valve seats and other areas, or would it pass harmlessly into the crankcase where it could be drained?




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Phlogiston

11-08-1999 04:58:07




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 Re: Valve Housing Rocker Arm Assembly in reply to Bill(Tx), 11-07-1999 19:33:38  
I suggest simply removing and disassembling the entire unit. Soak the parts in keroscene. When you have all the arms off the shaft, inspect it and make sure no sediment is left in the tube. This is the oil passage, and any dirt should be removed. I hace done this with my Super C, it is not a hard job. One more thing. When you take off the c-clip, make sure it does not shoot across the room. Also remember that when you reinstall, that the valve clearance should be adjusted.

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Farmer Bob

11-08-1999 20:33:37




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 Re: Re: Valve Housing Rocker Arm Assembly in reply to Phlogiston, 11-08-1999 04:58:07  
Phlogiston, My 2 cents worth...If you have crud built up in/around the rocker arm assembly, I'm thinking you should also check the cam follower chamber as well. This is on the right side of the engine behind the oil filter and distributor and has a long plate with gasket and about 4-5 bolts holding it on. This area is prone to building up sludge in older engines. The gasket does not normally come with a overhaul set but can be ordered. I'd guess yours has never been removed since the tractor(s) was new. I just did the one on my '48 M and got a 2 lb coffee can full of gunk out of it. I should caution you that it's alot better to remove the pan and insert a plastic sheet up from the bottom and over the main and rod bearings because when you flush out the orafices alot of that stuff will end up in the pan if not removed. When you remove the push rods keep them in order (back into same hole they come out of). Same goes for the cam followers. I'd put them in a empty egg carton. The extra couple of hours and the cost of a new pan gasket would be well worth it in the long run. Good luck. FB

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