Section 112 of the Act, 15 U.S.C. 2312,provides,1975. When a consumer purchases repair of a consumer product the date of manufacture of any replacement parts used is the measuring date for determining coverage under the Act. The date of manufacture of the consumer product being repaired is in this instance not relevant. Where a consumer purchases or obtains on an exchange basis a rebuilt consumer product, the date that the rebuilding process is completed determines the Act's applicability.