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Pump Flow Rate Test

  1. Allow power steering fluid to cool to 130°F (55°C). With engine at full governed RPM, close shutoff valve. Flow should read zero. Quickly open shutoff valve. Flow rate should immediately return to normal.
  2. Repeat this test once, but DO NOT allow fluid temperature to exceed 200°F (93°C). If flow rate does not immediately return to normal, repair or replace pump.
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