TB-9-2300-403-45 Technical Bulletin for Aluminum Oil Cooler Repair 6V53 8V71 AVDS-1790 Engines Download
Page 2 of 6
provide clearance to insert new tubes. mately 900° F or until flux melt. Apply flux and (7) Insert new tubes and weld, in accordance continue heating locally until brazing temperature with d above, using aluminum alloy 6061, 1100, or (1080° F) is reached. Apply filler at brazing temper- 3003. ature. NOTE Tube size, material, and configuration must be equal to original. (2) Apply brazing alloy. (3) Immediately after brazing, quench work in water heated to a minimum of 180° F. Additional washing in hot water and acid is necessary to re- g. ess: Repair of leak in tube, using torch brazing proc- move corrosive flux. 5. Test. a. Using air, nitrogen, or inert gas, test cool- (1) Using torch, preheat work area to approxi- er for leaks under water at 400 psi. Figure 1. Tube replacement details. b. Dry thoroughly with compressed air. will submit DA Form 2028 (Recommended Changes 6. Surface conditioning. Apply chemical treat- to Publications) direct to the Commanding Gen- ment (Alodine). eral, U.S. Army Tank-Automotive Command, ATTN: 7. Reporting Of Equipumnt Publication Improve- AMSTA-MAP, Warren, Mich. 48090. Contrac- ments. The reporting of errors, omissions, and recom- tor will submit a “Report of Shortcoming” to the mendations for improving this publication by the Contractor Officer or his designated representa- individual user is encouraged. Depots/Arsenals tive. 2