My power steering just stoped working. I changed the pump last year with a used one. It worked fine until now. There is no leaks and the pump is full of oil. the front end is all new. does anyone have a idear what is wrong? Thanks.

Belt still on t?

Belt still tight? Sometimes they get loose enough to fail to drive the pump.

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Whoever said there's nothing more expensive than a cheap Mercedes never had a cheap Jaguar.

83 300D Turbo with manual conversion, early W126 vented front rotors and H4 headlights 400,xxx miles
08 Suzuki GSX-R600 M4 Slip-on 22,xxx miles
88 Jaguar XJS V12 94,xxx miles. Work in progress.

yep belt is on and tight. thanks

does anyone know someone who rebuilds powersteering pumps?

Is there fluid movement in the reservoir when the engine is running?

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I changed the pump and still have the same problem.

Either a hose is blocked, or there's a problem in the steering box. I'd start by checking the hoses.

__________________
Whoever said there's nothing more expensive than a cheap Mercedes never had a cheap Jaguar.

83 300D Turbo with manual conversion, early W126 vented front rotors and H4 headlights 400,xxx miles
08 Suzuki GSX-R600 M4 Slip-on 22,xxx miles
88 Jaguar XJS V12 94,xxx miles. Work in progress.

I saw that the high pressure line was damaged next to the fitting.So I changed it thinking that maybe the inside was damaged also. The line was clear. now im going for some steering fluid. thanks for all your help. I will check the return line also.

Can you see fluid movement in the reservoir when the engine is running? If so, the pump is moving fluid and your problem is likely in the steering box. It's highly unlikely to be the pump or lines - you already changed the pump and the hydraulic pressure is sufficient to blow through any "blockage" that may be in the lines.

If you changed the pump and had an air pocket in there, it's possible you're airbound. Try running the engine and turning the steering wheel lock to lock several times to "burp" the system.

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Current stable:
1995 E320 149K (Nancy)
1983 500SL 120K (SLoL)

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1985 524TD 167K (TotalDumpster™)

Gone but not forgotten:
1986 300SDL (RIP)
1991 350SD
1991 560SEL
1990 560SEL
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yes fluild is moving in the pump. The steering is harder turning to the right than it is to the left. I will replace the steering box next. Thanks for the help!