Exhibit (23) to Annual Report

On Form 10-K

for Fiscal Year Ended June 30, 2014

By Parker-Hannifin Corporation

CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM

We consent to the incorporation by reference in Registration Statement No. 333-186741 on Form S-3 and Registration Statement Nos. 333-103181, 333-107691, 333-117761, 333-126957, 333-186733, 333-186734 and 333-192909 on Form S-8 of our report dated August 22, 2014, relating to the financial statements and the financial statement schedule of Parker-Hannifin Corporation and subsidiaries (the “Company”), and the effectiveness of the Company’s internal control over financial reporting, appearing in this Annual Report on Form 10-K of the Company for the year ended June 30, 2014.

/s/ DELOITTE & TOUCHE LLP

Cleveland, OH

August 22, 2014