HELP! 8v71 4905 Power Steering Loss - Page 2
 

HELP! 8v71 4905 Power Steering Loss

Started by Ryker, October 21, 2018, 02:25:26 PM

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Ryker

I did not have a way to cross reference but it was only $4 so I'll try it out. It said it was for Vickers (Eaton) but did not give me a model number.
1974 GMC P8M4905A-615

luvrbus

There is only the 2 anyways so you have good odds it is right
Life is short drink the good wine first

chessie4905

In my experience 50-50 is usually 90-10. Lol
GMC h8h 649#028 (4905)
Pennsylvania-central

luvrbus

Me too the one he ordered is the most common and 4 bucks is a good price,I need to find a deal and buy some more,I am still passing out the Jake seals I bought a few years back  8)
Life is short drink the good wine first

Ryker

This banter was very helpful! For some reason I did not see the other part number when I was searching but now I see that Motion Industries sells both, and they are local here in Sacramento, which I also did not know. So I will be driving there and taking a look at both part numbers and buying a couple extra. 199390 is only $6.59.
1974 GMC P8M4905A-615

Ryker

Well, good thing I placed the second order. 199390 is the correct o-ring. 262332 is way too small. I popped it in and it is holding, for now.
1974 GMC P8M4905A-615

TomC

Maybe consider running 15W-40 instead especially with colder weather coming. Good Luck, TomC
Tom & Donna Christman. 1985 Kenworth 40ft Super C with garage. '77 AMGeneral 10240B; 8V-71TATAIC V730.

luvrbus

If you installed the right seal it's good some of those pumps run on 2500# psi,the standard o-rings just don't hold 
Life is short drink the good wine first

Ryker

I compared this o-ring to the O'Relly o-ring that I got for one dollar, and I can not tell a difference at all. I even put them both under a magnifying glass and the difference is just not noticeable. I guess maybe slightly different material? Dimensions are absolutely identical and they feel exactly the same to me.
1974 GMC P8M4905A-615

Ryker

My steering was very easy before this last o-ring loss. Now it is very stiff, and I think worse after I put the new o-ring in the other day. The book does not have a diagram. I am trying to remember what order I put the spring in. Does anybody have a diagram, or an order to insert the parts?
1974 GMC P8M4905A-615

Dave5Cs

Ryker  Don't know where you are in Sacramento but there is a good Hydraulics shop in Rocklin, CA Also :)
Rocklin Hydraulics.
http://www.rocklinhydraulics.com/


Dave5Cs
"Perfect Frequency"1979 MCI MC5Cs 6V-71,644MT Allison.
2001 Jeep Cherokee Sport 60th Anniversary edition.
1998 Jeep TJ ,(Gone)
Somewhere in the USA fulltiming.

luvrbus

The spring goes in first,then the relief valve with the o-ring towards the cover and pin 
Life is short drink the good wine first