EXHIBIT 23(a) CONSENT OF INDEPENDENT ACCOUNTANTS We hereby consent to the incorporation by reference in this Registration Statement on Form S-8 of our report dated July 26, 2002 relating to the financial statements and financial statement schedule of Parker Hannifin Corporation, which appears in Parker Hannifin's Annual Report on Form 10-K for the year ended June 30, 2002. /s/ PricewaterhouseCoopers LLP PricewaterhouseCoopers LLP Cleveland, OH February 13, 2003