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Ford Tractors Discussion Forum

172 diesel rocker arm drain tube

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Author  [Modern View]

02-11-2019 06:31:57

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Hey guys , got a question, I have 2 172 diesels, 1 the rocker arm drain tube is open the other is squeezed closed ,there’s no marks on it like previous owner has done this ,, which is proper? Seems as thou it being closed would increase pressure right?

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02-12-2019 13:03:10

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 Re: 172 diesel rocker arm drain tube in reply to Operator4100, 02-11-2019 06:31:57  
Thanks guys, this is that 172 marine diesel I got, just kinda wondering I something might be set up different, also if anyone has a bad block I need the oil fill tube that goes into the block, this one you fill from valve cover which wont work for tractor use,,
Thanks, DW

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Colin King

02-13-2019 13:47:07

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 Re: 172 diesel rocker arm drain tube in reply to Operator4100, 02-12-2019 13:03:10  
I'm afraid I don't have a spare. New Holland appears to have it. It's p/n C0NN6766A (originally 8N6763B).

Good luck bringing that engine to life. That's a pretty interesting find!


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Colin King

02-12-2019 12:04:42

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 Re: 172 diesel rocker arm drain tube in reply to Operator4100, 02-11-2019 06:31:57  
In the two that I've seen, it should be open.

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02-12-2019 01:43:11

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 Re: 172 diesel rocker arm drain tube in reply to Operator4100, 02-11-2019 06:31:57  
All I've seen were open. If all the engine is within specification the open tube will not drop the oil pressure.

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