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Crawlers, Dozers, Loaders & Backhoes Discussion Forum

336 case, engine block

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01-21-2018 13:36:50

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put the engine back in,, filled with oil,, started it, guess it all came out an 1/8 inch hole right behind the timing cover on the rh side,,, looked it over with a mirror,, the hole is nearly 3/8, but seems to have a piece of rubber in it with an 1/8'' hole in the middle of it,, started on it with an easy out,, then decided to put a barn screw in with a rubber washer,, anyone know what this is for ? its built in the casting,, comes out on an angle toward the ground,, pretty dangerous running it like this,, gonna have to figure something better , or get a low oil pressure alarm,,, screw did fit really really good though,, thanx. had about 48lbs pressure ,, second run...

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01-24-2018 04:23:26

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 Re: 336 case, engine block in reply to Trak, 01-21-2018 13:36:50  
You must have the compressor oil lines connected,you cannot block them off otherwise the compressor will seize up,that fitting you need is an 90° elbow,one end threaded 1/8npt,the other end tail,it's low pressure with a clip,the Case part #A27489,you might get a fitting at a plumbers shop.you are nearly there keep at it.


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01-29-2018 15:42:21

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 Re: 336 case, engine block in reply to AJ., 01-24-2018 04:23:26  
was about to give on that one,, I got it out and put a ninety in,.. thanx

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01-21-2018 17:07:00

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 Re: 336 case, engine block in reply to Trak, 01-21-2018 13:36:50  
That's the return line from the compressor,the thread is 1/8 NPT,should be a 90°,the supply line comes from beside the dip stick on the block,same thread.


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01-22-2018 07:26:17

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 Re: 336 case, engine block in reply to AJ., 01-21-2018 17:07:00  
thanx AJ,, might be a rough go trying to get at it.. lol

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01-21-2018 14:15:48

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 Re: 336 case, engine block in reply to Trak, 01-21-2018 13:36:50  
wonder if its where the tach was? no outside places to thread a bolt, (i'll look again) I changed this engine from a balancer pump to front mount,, didn't really run it much before, but I think I would have known I had lost all the oil at once,, thanx,

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01-21-2018 14:22:39

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 Re: 336 case, engine block in reply to Trak, 01-21-2018 14:15:48  
book shows tack different location,, maybe should just be a freeze plug, doesn't seem right though

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01-21-2018 15:32:31

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 Re: 336 case, engine block in reply to Trak, 01-21-2018 14:22:39  
its a line going to the center of the compressor I do believe,, I looked at the old elbow,, which is broke, have to look again, funky looking 1/8'' pipe elbow,, looks normal on the outside of the engine, but thread side , can't tell much, try again tommorrow

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