Exhibit 99.3

                                  Certification
            Pursuant to Section 906 of the Sarbanes-Oxley Act of 2002
                with Respect to the Quarterly Report on Form 10-Q
                       for the Quarter ended June 30, 2002
                              of Dover Corporation

         Pursuant to Section 906 of the  Sarbanes-Oxley Act of 2002 (subsections
(a) and (b) of section 1350,  chapter 63 of title 18, United States Code),  each
of the undersigned  officers of Dover Corporation,  a Delaware  corporation (the
"Company"), does hereby certify, to such officer's knowledge, that:

        1.      The  Company's Quarterly Report on Form 10-Q for the quarter
                ended June 30, 2002 (the "Form 10-Q") fully complies with the
                requirements of Section 13(a) of the Securities Exchange Act
                of 1934, as amended; and

        2.      Information contained in the Form 10-Q fairly presents, in all
                material respects, the financial condition and results of
                operations of the Company.



Dated:   August 13, 2002                             /s/ Thomas L. Reece
                                                     -------------------
                                                     Thomas L. Reece
                                                     Chairman, President and
                                                     Chief Executive Officer



Dated:   August 13, 2002                             /s/ David S. Smith
                                                     ------------------
                                                     David S. Smith
                                                     Vice President, Finance and
                                                     Chief Financial Officer


         The certification set forth above is being furnished solely pursuant to
Section 906 of the  Sarbanes-Oxley Act of 2002 and is not being filed as part of
the  Form  10-Q or as a  separate  disclosure  document  of the  Company  or the
certifying officers.