POWER OF ATTORNEY



        Know all by these presents, that the undersigned hereby constitutes and appoints each of Joseph R.

Leonti, Kristen L. Gest, and Kelley B. Standard, or any of them signing singly, and with full power of

substitution, the undersigned's true and lawful attorney-in-fact to:



(1) prepare, execute in the undersigned?s name and on the undersigned?s behalf, and submit

  to the U.S. Securities and Exchange Commission (the ?SEC?) a Form ID, including

 amendments thereto, and any other documents necessary or appropriate to obtain codes

 and passwords enabling the undersigned to make electronic filings with the SEC of reports

 required by Section 16(a) of the Securities Exchange Act of 1934 or any rule or regulation

 of the SEC;



(2) execute for and on behalf of the undersigned, in the undersigned's capacity as an officer

 and/or director of Parker-Hannifin Corporation (the ?Company?), Forms 3, 4, and 5 in

 accordance with Section 16(a) of the Securities Exchange Act of 1934 and the rules

 thereunder;



(3) do and perform any and all acts for and on behalf of the undersigned which may be

 necessary or desirable to complete and execute any such Form 3, 4, or 5, complete and

 execute any amendment or amendments thereto, and timely file such form with the SEC

 and any stock exchange or similar authority; and



(4) take any other action of any type whatsoever in connection with the foregoing which, in the

 opinion of such attorney-in-fact, may be of benefit to, in the best interest of, or legally

 required by, the undersigned, it being understood that the documents executed by such

 attorney-in-fact on behalf of the undersigned pursuant to this Power of Attorney shall be in

 such form and shall contain such terms and conditions as such attorney-in-fact may

 approve in such attorney-in-fact's discretion.



       The undersigned hereby grants to each such attorney-in-fact full power and authority to do and

perform any and every act and thing whatsoever requisite, necessary, or proper to be done in the exercise

of any of the rights and powers herein granted, as fully to all intents and purposes as the undersigned might

or could do if personally present, with full power of substitution or revocation, hereby ratifying and

confirming all that such attorney-in-fact, or such attorney-in-fact's substitute or substitutes, shall lawfully do

or cause to be done by virtue of this power of attorney and the rights and powers herein granted.  The

undersigned acknowledges that the foregoing attorneys-in-fact, in serving in such capacity at the request of

the undersigned, are not assuming, nor is the Company assuming, any of the undersigned's responsibilities

to comply with Section 16 of the Securities Exchange Act of 1934.



       This Power of Attorney shall remain in full force and effect until the undersigned is no longer

required to file Forms 3, 4, and 5 with respect to the undersigned's holdings of and transactions in

securities issued by the Company, unless earlier revoked by the undersigned in a signed writing delivered to

the foregoing attorneys-in-fact.



        IN WITNESS WHEREOF, the undersigned has caused this Power of Attorney to be executed as of

this 15th day of August, 2017.



   /s/ Andrew D. Ross

                   Andrew D. Ross





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