A power steering pumps as much as the power steering pump can
pump.
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To compute the power of a submersible pump, you need the
pressure and the pump power.
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Remove the power steering pump hose. Remove the power steering
pump belt. Remove the power steering pump retaining bolts. The
power steering pump will come off.
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Remove the belt for am your power steering pump. Remove the
power steering pump hose. Remove the power steering pump retaining
bolts. Reverse the process to install your new power steering
pump.
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If you have power and ground to the pump, the pump is bad.