This Assembly kit is a genuine OEM part fit for:
ProX17 and ProX19 Stand and cart models with the following model numbers 17G177, 17G178, 17G179, 17G180
Install authentic Graco parts if the pump is worn or damaged. If the sprayer isn't priming or spraying, it may be due to wear in the piston pump packing or a failure in the check ball valve.
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