Sabre Posted August 19, 2018 Share Posted August 19, 2018 We replaced the steering box on my son's 300TDi Discovery. We bled the system until the fluid coming out of the bleed nipple was free of any air. But the power steering performs on-and-off. For periods it will be active, and steer like normal, just to loose assistance, and the steering action becomes very heavy. We bled the system again, but the fluid remained bubble free We followed the bleeding process as described in the Haynes manual; Fill the reservoir, turn the wheels in the straight ahead position, start the engine, do not rev above idling, open the bleed screw and allow the oil to flow until no more air bubbled We had to wait a very long time before before the first oil flowed from the bleed screw, something like 20 minutes Did we do it wrong ? Is there another method ? Quote Link to comment Share on other sites More sharing options...
western Posted August 19, 2018 Share Posted August 19, 2018 have you centralised the new steering box ? if not that might cause a weird steering feel/operation. 1 Quote Link to comment Share on other sites More sharing options...
Sabre Posted August 19, 2018 Author Share Posted August 19, 2018 17 minutes ago, western said: have you centralised the new steering box ? if not that might cause a weird steering feel/operation. Western, I think we did. The drop arm can only fit in 4 positions. We fitted it in what appears to be the correct position, then turned the wheel from stop- to-stop. At the half-way point the drop arm lined up with the drag link ball joint. Did we do it right ? Quote Link to comment Share on other sites More sharing options...
western Posted August 19, 2018 Share Posted August 19, 2018 how to centralise the box in 1 Quote Link to comment Share on other sites More sharing options...
dailysleaze Posted August 20, 2018 Share Posted August 20, 2018 My steering goes heavy when the belt slips Quote Link to comment Share on other sites More sharing options...
Eightpot Posted August 20, 2018 Share Posted August 20, 2018 Was it a new or used box? Quote Link to comment Share on other sites More sharing options...
Sabre Posted August 21, 2018 Author Share Posted August 21, 2018 On 8/20/2018 at 5:15 PM, Eightpot said: Was it a new or used box? Recon Quote Link to comment Share on other sites More sharing options...
Sabre Posted August 21, 2018 Author Share Posted August 21, 2018 On 8/20/2018 at 4:18 PM, dailysleaze said: My steering goes heavy when the belt slips We will definitely check this out, thanks Quote Link to comment Share on other sites More sharing options...
Sabre Posted August 21, 2018 Author Share Posted August 21, 2018 On 8/19/2018 at 10:48 PM, western said: how to centralise the box in Thanks for this, a really good article, even if it reminds me of a Haynes manual where every component can be removed or refitted easily. The components that they work on are never stuck 😡 😄 Quote Link to comment Share on other sites More sharing options...
Sabre Posted August 28, 2018 Author Share Posted August 28, 2018 We replaced the Power steering pump, bled the system, and the steering is now 100% Thanks for all the replies Quote Link to comment Share on other sites More sharing options...
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