TM-9-2350-358-BD M109A6 Battlefield Damage Assessment and Repair Download
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TM 9-2350-358-BD 11-12. HYDRAULIC HIGH-PRESSURE TUBING REPAIR (PERMASWAGING) - CONTINUED References: TM 9-2350-314-20-2-2 Procedural Steps: NOTE Effective, leak-proof permaswaging depends on tube ends being square, deburred and very clean, and precise marking of tubing to avoid twisting of line (stress) and centering inside fitting(s). 1. Long Axis marking. Using a marking pen and a ruler, draw a straight line on the tubing, starting in the undamaged area, through to the damaged section, into the other undamaged area, as shown. 2. Determine the repair method required. A. Pinhole or circumferential crack not exceeding 0.30 inch, perform step 3 and steps 7 thru 13. B. Pinhole, circumferential or longitudinal crack exceeding 0 30 inch, perform step 4 and steps 7 thru 13. C. Repair of leaking tee or elbow (permanent tube connection type), perform step 5 and steps 7 thru 13. D. Repair leaking end fitting, perform step 6 and steps 7 thru 13. 3. Make one or two cuts as necessary to enable removal of damaged section. If two cuts are required, the distance between them shall not exceed 0.30 inch. PIN HOLE AND CIRCUMFERENTIAL CRACKS NOT EXCEEDING 0.30 INCH 11-18