TM 10-3930-659-20 10-16.    ACCUMULATOR-TO-ACCUMULATOR CROSSOVER LINE REPLACEMENT (Con't). 3. Remove crossover line (5) from accumulator (8) and tee (7). 4. Remove two preformed packings (6) from accu- mulator (8) and tee (7). b. INSTALLATION 1. Install two new preformed packings (6) on tee (7) and accumulator (8). 2. Install crossover line (5) on tee (7) and accumulator (8). • Bleed brake system (see paragraph 10-17). • Install left side cab skirt (see paragraph 14-6). • Remove frame locking bar (see TM 10-3930-659-10). TA706962 10-48