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  #1  
Old 06-15-2015, 11:32 AM
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elshiv elshiv is offline
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Default Onan Oil Plug?

Hey Guys,
I drained the oil out on my 982 for the first time last night. I realized the oil plug is in a horrible spot! I'd really like to install an oil valve so it's easier to do oil changes! I have 2 I'm looking at but I'm unsure of the size of the actual oil plug. I know I used a 3/4 socket to remove it but that is not what they show on the charts on the Valve site.

http://www.qwikvalve.com/Heavy-Duty-...oto-Valve.html
http://www.ezoildrainvalve.com/industrial-engines.html

Can someone verify what size the actual plug is? I'm guessing it's a 3/8" NPT plug. but I'd really like to make sure I'm ordering the right thing the first time.
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1980ish 982 w/ 3pt. & PTO /50C deck - a Work in progress. Brinly Moldboard Plow.

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  #2  
Old 06-15-2015, 02:22 PM
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Sam Mac Sam Mac is offline
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Well since you have the plug out take it to a hardware store and compare it to different size pipe.
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  #3  
Old 06-15-2015, 09:50 PM
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john hall john hall is offline
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I replaced the plug in mine last year. For some reason I think it had a flange with an O-ring. If so it wouldn't be NPT, possible NPS, not certain. I'm pretty sure mine came from Cub Cadet Warehouse, don't know if Cadet still offers it or not. I remember while draining the oil that it would probably be less mess to either pull the engine or drop the deck and mule drive. Some re-engineering is certainly in order!
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  #4  
Old 06-16-2015, 09:04 AM
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elshiv elshiv is offline
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Well, It's definitely not a 3/8"! I have some 3/8" bolts and nuts and it does not fit.. it's much bigger.

I need to go find my calipers!
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1980ish 982 w/ 3pt. & PTO /50C deck - a Work in progress. Brinly Moldboard Plow.

I'm a complete noob at this so please take it easy on me.
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  #5  
Old 06-16-2015, 09:08 AM
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ol'George ol'George is offline
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A 3/8 NPT is not a 3/8 SAE ( bolt thread)
Go to the Hwd/home cheepo or Blows and compare or ask a friend
Edit:
Parts tree shows it as a fine thread headed plug, with "O" ring, as J..
Hall stated.
So caliper and thread pitch gauge will tell you for sure.
It will not be a pipe plug, unless it has been re threaded.
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Old 06-17-2015, 07:08 AM
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I went to Autozone and picked up a new plug for one of mine.
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Old 06-17-2015, 07:23 AM
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Quote:
Originally Posted by Oak View Post
I went to Autozone and picked up a new plug for one of mine.
Do you know what size it was?
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1980ish 982 w/ 3pt. & PTO /50C deck - a Work in progress. Brinly Moldboard Plow.

I'm a complete noob at this so please take it easy on me.
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  #8  
Old 06-17-2015, 08:26 AM
R Bedell R Bedell is offline
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3/8" bolt threads and 3/8" Iron Pipe threads (and sizes) are two totally different animals.


3/8" Iron Pipe dimensions:
Attached Images
File Type: jpg NPT-2.JPG (2.4 KB, 34 views)
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