TM 9-2320-361-20 3-31. MANIFOLD HEATER (UNCOVERED) REPLACEMENT (Contd) e. Elbow Removal 1. Loosen clamp (17) on air intake tube (23). 2. Remove four nuts (33), lockwashers (34), clamp (37), elbow (25), and gasket (24) from air intake manifold (22) and air intake tube (23). Discard lockwashers (34) and gasket (24). 3-67