TM 10-3930-659-20 9-2. FRONT AND REAR DIFFERENTIAL BREATHERS REPLACEMENT (Con't). 2. Remove breather (5) and preformed packing (4) from cover (3). Discard preformed packing. b. INSTALLATION 1. Install breather (5) and new preformed packing (4) on cover (3) NOTE Groove In breather must be positioned parallel to axle shaft when Installing breather assembly on differential. 2. Install breather assembly (1) on differential (2). FOLLOW-ON TASKS: • Install transmission bottom guard (rear differential breather only) (see paragraph 14-8). • Install loader frame cover (front differential breather only) (see paragraph 14-11). TA706744 9-5