This topic contains 1 reply, has 2 voices, and was last updated by 
Jeffrey Voight 1 year, 3 months ago.
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I recently replaced my steering gear box, ps pump, lines, fittings and ps cooler. It has no fluid in it now. My question is this: Can I do the handheld vacuum leak test with no fluid in the system, or does it HAVE to have fluid?
Thanks
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Air and fluids are too different to check this way. All your seals are designed to keep fluid from exiting outward. A vacuum test will not be accurate to test for leaks and could possibly damage sealing.
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