TM 9-2320-361-34 15-42. INTERMEDIATE CASE MAINTENANCE (Contd) FOLLOW-ON TASKS: ● Install power leveler (para. 15-41). ● Install vertical leveling worm rear (para. 15-40). ● Install horizontal leveling worm gea;r (para. 15-39). ● Complete boring case installation (para. 15-38). . Replace lubricant (LO 9-2320-209-12-1). 15-181