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Ford 9N, 2N & 8N Discussion Forum
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Re: Saftey valve question

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Author  [Modern View]

05-13-2013 18:08:30

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BigDanT said: (quoted from post at 18:01:11 05/13/13) Just to clarify, I meant to say the new safety valve was sitting on the bench...the old one is still in there. Dan

I was real confused there for a minute. I hate doing that...

Anyway, pressure relief valves can get sticky from rust and debris and not fully close. If it sticks partially open it decrease the amount of total pressure built, limiting you lifting capacity. Its dumping fluid straight back to the sump instead of sending it to the cylinder. It should bleed off overtime as well.

Your new one should fix that. You can do it without removing the pump, but you will be hugging your transmission and cussin for about an hour
This post was edited by JCinKY at 18:09:12 05/13/13.

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05-13-2013 18:20:07

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 Re: Saftey valve question in reply to JCinKY, 05-13-2013 18:08:30  
JC, I tried it with the pump still in there...only took about 2 minutes before I was cussing...decided it would be a lot less aggravating to dump the oil, pull the shaft and drop the pump...anybody need a stubby little 11/16 wrench...thanks for the help. Dan

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05-13-2013 18:27:01

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 Re: Saftey valve question in reply to BigDanT, 05-13-2013 18:20:07  
Safety valve and pressure rellief valve are two separate components

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05-13-2013 20:32:02

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 Re: Saftey valve question in reply to Juicybusa2, 05-13-2013 18:27:01  
Quoting Removed, click Modern View to seeDepends on what tractor model we are dealing far, everybody just made assumptions. :roll:

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05-14-2013 03:28:41

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 Re: Saftey valve question in reply to JMOR, 05-13-2013 20:32:02  
JMOR...48 N. Is there a difference between the 9,2 and 8N safety/relief valve?

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05-14-2013 06:48:59

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 Re: Saftey valve question in reply to BigDanT, 05-14-2013 03:28:41  
N .. no.. N and NAA yes. :)

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05-14-2013 13:04:19

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 Re: Saftey valve question in reply to soundguy, 05-14-2013 06:48:59  
SG...I worded that wrong, meant to ask is there a difference between a safety and relief valve or are they same assembly...Part# 8n638 is what I got. Thanks

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05-14-2013 14:14:56

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 Re: Saftey valve question in reply to BigDanT, 05-14-2013 13:04:19  
no difference on an N

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