Provide complete Parts and Labor warranty for new materials of First Party manufacture against fault or defective materials for a period of five years from date of completion of this agreement.  This warranty shall not apply to any material which has been repaired, rebuilt, altered or in any way tampered with, improperly used or installed, or abused by support personnel not previously authorized by R.A. Colby, Inc.  If any parts are found to be defective, they must be returned to R.A. Colby, transportation charges prepaid, and if upon examination we find parts or materials to come under the terms of our guarantee, we will replace or repair same free of charge.  This warranty excludes electric motors, solid state equipment, AC-DC rectifiers and other incorporated components which carry independent manufacturers warranty.  First Party guarantee is limited to the free replacement or repair of defective parts or material and none of our employees, servants, or agents has authority to assume for us any other obligations of liabilities in connection with our products.