Power steering fault on 806

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rossmedwards
Posts: 2
Joined: 27 Jun 2001, 23:09
Location: United Kingdom
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Power steering fault on 806

Post by rossmedwards »

Please help. I have a "T" reg 806 and under 2,000 rpm the power steering does not work.
But over 2,000 rpm it is fine.
Please help as parking is not nice with out it
rframpton
Posts: 5
Joined: 31 May 2001, 15:55
Location: United Kingdom
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Post by rframpton »

Only a few suggestions. Providing you're not loosing fluid then it might be a slack/slipping drive belt to the pump or an internal pump problem which means it doesn't provide enough pressure at low rpm. At higher rpm, the vehicle is probably moving anyway making the steering easier and masking the low pump pressure. Whats the PAS like if the 806 is stationary but with the engine revving above 2000 rpm?
rossmedwards
Posts: 2
Joined: 27 Jun 2001, 23:09
Location: United Kingdom
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Post by rossmedwards »

rframpton
Thanks for your reply.
When its staitionary it still happens.
The fluid is at the right level and the belt is not slack as they have been changed recently.
Any suggestions???
Ross Edwards
Dave Burns
Posts: 1915
Joined: 14 May 2001, 05:30
Location: United Kingdom
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x 2

Post by Dave Burns »

Hello Rossmedwards.
My thought's are
1. a blocked or restricted pipe on the intake (suction) side of the pump.
2. a broken or weak pressure relief valve spring.
3. a foreign object jammed in the relief valve.
4. a failed piston head assembly in the hydraulic ram (rare but not unknown).
5. the pump may require priming (only if the pump had run dry for some reason).
6. worn out or damaged pump due to ingress of foreign matter.
7. steering rack valve (extremely unlikely).
If possible Look into the power steering fluid reservoir where the return pipe comes in, with the engine running (at tickover) and steering at rest a good return flow should be observed, if there is a good flow then No.1 above can be discounted, find out from your dealer if it is possible to service the relief valve in the power steering pump, testing the ram requires it's removal from the vehicle, but I would start with the valve in the pump.
Regards Dave
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