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Anyone know the spec for the o-rings on the M110 pressure relief valve?
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Posted 12/4/2023 8:32 PM
rhd280
Regular




Date registered: Dec 2014
Location: New Zealand
Vehicle(s): 1982 280GE LWB RHD
Posts: 62
50
Anyone know the spec for the o-rings on the M110 pressure relief valve?

The fuel distributor on the M110 K-jetronic fuel distributor has a pressure relief valve with two o-rings. One big, one small. Somewhere I found a site that said they were A007 and A011 and another site said this is spec AS-568A which says it is ID=7.65 OD = 11.21 and CS = 1.78 using Nitrim seal. However, the o-ring I collected is too thin.

Does anyone know what the actual OEM size is for the small and large o-rings?

These would be the specs (ID/OD/thickness cross-section) to provide to a generic o-ring supplier.

Asking the Mercedes specialists in NZ is hopeless. All have to order a $2 part from Germany meaning it will arrive in 2024.



(Fuel-Press-RegO-rings.jpg)



(FPRegulator.jpg)



(FuelDistributor.jpg)



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Attachments Fuel-Press-RegO-rings.jpg (10KB - 0 downloads)
Attachments FPRegulator.jpg (17KB - 0 downloads)
Attachments FuelDistributor.jpg (48KB - 0 downloads)
#244077
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Posted 12/5/2023 6:04 PM
Doug Nel
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Date registered: May 2006
Location: Cape Town, South Africa
Vehicle(s): 1982 280GE 5 door automatic
Posts: 258
100
Re: Anyone know the spec for the o-rings on the M110 pressure relief valve?

Maybe contact Colin Duncan in Brisbane. He might be able to help you.

https://k-jet.biz/

https://k-jet.biz/product/0-438-000-017-system-pressure-valve-seal-k...



Edited by Doug Nel 12/5/2023 6:08 PM
#244078 - in reply to #244077
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Posted 12/17/2023 9:50 PM
Otiswesty
Administrator




Date registered: Jun 2007
Location: Portland, Oregon
Vehicle(s): 463.241, 461.213
Posts: 3002
2000
RE: Anyone know the spec for the o-rings on the M110 pressure relief valve?

I'm not sure the pictures you are showing are correct. One shows a 4 cyl fuel distributor. Are these just file photos you have found or are you taking apart your own fuel injection pump.

Here is what I see when I look up the parts in MB EPC for my 1983 280GE.
And after that is what this kit looks like based on an online part search with that rebuild kit part number.



(EPC.jpg)



(Kit.jpg)



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Attachments Kit.jpg (36KB - 0 downloads)
#244084 - in reply to #244077
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