Why is my Jeep Commander's power steering stiff after towing a caravan?

After towing my caravan with my Jeep Commander for a day, the next day I find that the power steering is very stiff and seems to grind for about 200 yards. Then all seems OK. Any ideas why?

Asked on 7 August 2010 by guernseyman

Answered by Honest John
Strange, but it seems to indicate that the PAS pump is not powering up the rack immediately, so there may be a fault with the pump or a leak somewhere.
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