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806 Steering

A

Andy S

New User
All, Problem- No power steering, or brakes.
I have done some work on this and looking for some more advice. removed pilot valve ( aka steering valve) and everything looks good and working properly. so I moved onto the MCV valve and removed the ck plug on bottom. According to I&T this plug is supposed to have 3k PSI but I have none. It then tells me to ck safty plug valve and it is not stuck. So this tells me that I am not getting any oil to the pump mounted inside MCV area. I believe this pump is faulty now. Anyone have any other ideas?
 
That pump runs the whole hydraulic system do you have other circuts working ( hydraulic couplers ) if not then might be pump. I had the nut come off the shaft once just put a new locking nut on. The old one was right there on the bottom. I assume you have already changed the filter and checked oil level and is full.
 
Hello Andy,
first thing to do is change the filter and make sure the gasket or seal is good on the filter cover. fill the hyd to proper level. Then you remove the plug on the rear side of MCV valve it is the small one i think it is 5/8 wrench. this will bleed the pump. some times you can do it just by cranking the engine over with the fuel shut off. some times you have to start it but it makes a mess. you want to get a good stream of oil out of the hole. if you can't get any oil out of the hole then i would look at your pump. That pump works the steering brakes and TA your hitch and remotes use a different pump. if you get steering back and after sitting you loose it again you can try overfilling the Hyd by 5 gallons. most times if you have a weak pump it will loose its prime.
Good Luck Ed
abcrepairparts
 
Please explain front pump.... Not for sure if I know where that one is. I have changed the filters and oil level is good. The MCV pump has been changed prior to me owning... so maybe just an o-ring blown out. Only way to tell is to drain oil and pull MCV out right?
 
A. A. PLUGGED FILTER. B. LOW PUMP VOLUME C. WRONG STEERING ORIFICE INSTALLED.
D. DEFECTIVE HAND PUMP. E. FLOW DIVIDER STUCK.
COPIED AND PASTED FROM AGPART LTD WEBSITE TROUBLESHOOTING
 
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