TM 10-3930-659-34 4-64. MAIN HYDRAULIC PUMP REPAIR (Con’t). c.           ASSEMBLY 1. Apply a coat of lubricating oil to surfaces of all internal parts. 2. Install new seal (10) and two studs (7) on rear cover (13). 3. Install two new seals (16) on main hydraulic pump body (17). 4. Install new channel seal (14), new thrust plate (15), and main hydraulic pump body (17) on rear cover (13). 5. Install idler gear (6) and drive shaft (5) on main hydraulic pump body (17). 4-260