TM 10-4320-344-10(2) Swing jack (4) down to vertical position.Align holes in post (3) andsleeve (5) .Insert pin (1) through holes.g .Use turncranks (2) to lower jacks (4) until trailer (6) is secured in levelp o s i t i o n .2.3.2.1 Unpacking.Models 609-A and US636HCCD-1 are shipped with a protective plywoodcap.The protective plywood cap will have been removed by unit maintenance as partof the service upon receipt of materiel.If depreservation was needed, it willhave been performed by unit maintenance.2.3.2.2 Installation of Pumping Assemblies.The suction port and discharge ports have agroove for connection to a grooved pipe coupling.Before operation, the suctionand discharge ports must be connected to a hoseline or pipeline.Pumping assemblyinstallation instructions for the TWDS are contained in applicable TWDS technicalmanual.2.4 INITIAL ADJUSTMEMTS, CHECKS, MD SELF TEST.Do not operate pump unless casing isfilled with water to level of suctionp o r t .Operating a dry pump will cause overheating and damage unit.The pumping assembly must be primed before initial startup.Once primed, reprimingis not needed unless the pump loses prime because of a leak, hoseline or pipelinebreak, or disconnection for maintenance.If the pumping assembly is to be operatedas a standalone unit or source pump,manually prime the pump by filling with waterthrough the pump fill plug or priming port cap.If the pumping assembly is to beoperated as a boost pump,it will receive priming water from the upline pump; buttrapped air must be released through the discharge elbow.2.4.1 Priming of Lead Pump.Refer to Figure 2-17 and prime the pumping assembly asf o l l o w s:a .Remove fill plug (1) or priming port cap (2).b .Fill pump casing (3) with water to bottom of fill plug hole.c .Install fill plug (1) or priming port cap (2).2-86CAUTION
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