TM 10-3930-659-20 12-16.    HYDRAULIC OIL RETURN TUBE-TO-STEERING VALVE HOSE REPLACEMENT (Con't). 3. Remove hose (2) from elbow (6). 4. Remove elbow (6) and two preformed packings (5) from steering valve (4).  Discard preformed packings. b. INSTALLATION 1. Install two new preformed packings (5) and elbow (6) on steering valve (4). 2. Install hose (2) on elbow (6). 3. Install new preformed packing (3) and hose (2) on hydraulic oil return tube (1). FOLLOW-ON TASKS: • Install transmission side guards (see para- graph 14-7). • Install cab skirts (see paragraph 14-6). • Remove frame locking bar (see TM 10- 3930-659-10). TA707585 12-46