TM 10-3930-659-20 12-18.    SECONDARY STEERING PUMP-TO-HYDRAULIC OIL RETURN FILTER HOSE REPLACEMENT (Con't). 3. Remove hose (3) and preformed packing (6) from tee (5).  Discard preformed packing. b. INSTALLATION 1. Install new preformed packing (6) and hose (3) on tee (5). 2. Install two new preformed packings (1) and adapter (2) on secondary steering pump (4). 3. Install hose (3) on adapter (2). FOLLOW-ON TASKS: • Close left engine upper sideshield (see TM 10-3930-659-10). • Remove frame locking bar (see TM 10-3930-659-10). TA707590 12-51