TM 10-3930-659-20 12-7. HYDRAULIC OIL RETURN TUBE REPLACEMENT (Con't). b. INSTALLATION 1. Install two new preformed packings (4) and adapter (2) on priority valve (1). 2. Install hydraulic oil return tube (3) on adapter (2). FOLLOW-ON TASKS: • Install hydraulic oil return filter-to-priority valve line and fittings (see paragraph 17-38). • Install hydraulic oil return tube-to-steering valve hose and fittings (see paragraph 12-16). • Install hydraulic oil return tube-to-forklift control valve hose and fittings (see paragraph 12-14). • Fill hydraulic reservoir with hydraulic fluid and check for leaks (see TM 10-3930-659-10). • Remove frame locking bar (see TM 10-3930-659-10). 12-25