Exhibit 23(a)

CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM

We consent to the incorporation by reference in this Registration Statement on Form S-3 of our report dated August 26, 2010, relating to the consolidated financial statements and 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 the Annual Report on Form 10-K of Parker Hannifin Corporation for the year ended June 30, 2010, and to the reference to us under the heading “Experts” in the prospectus, which is part of this Registration Statement.

/s/ Deloitte & Touche LLP
Cleveland, Ohio
August 26, 2010