TM9-2320-361-10 2-27. OPERATION OF WATER TANK TRUCKS (Contd) (11) When outside temperature permits, close shutoff valve (6), open exhaust stack cap (5), and shut off engine (refer to para. 2-17). h. Fording. (1) Drain delivery lines, manifold pipes, and delivery pump (refer to g,), turn pump delivery line discharge valve knob (7) and gravity delivery line discharge valve knob (8) right, to closed position, and secure dust caps (10) and (9). (2) Proceed with fording operation. Refer to para. 2-41 or 2-52. (3) After fording, flush out manifold pipes, delivery lines, and delivery pump. (4) Refer to para. 2-52 to complete after fording operations. 2-131