Exhibit 23(a)
CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM
We hereby consent to the incorporation by reference in this Registration Statement on Form S-3 of
our report dated August 16, 2006 relating to the consolidated financial statements, financial
statement schedule, managements assessment of the effectiveness of internal control over financial
reporting and the effectiveness of internal control over financial reporting, which appears in the
Annual Report to Shareholders for fiscal year ended June 30 2006, which is incorporated by
reference in Parker Hannifin Corporations Annual Report on Form 10-K for the year ended June 30,
2006. We also consent to the reference to us under the heading Experts in such Registration
Statement.
/s/ PricewaterhouseCoopers LLP
PricewaterhouseCoopers LLP
Cleveland, Ohio
May 24, 2007