TM 10-4320-344-242.16.22 RheostatReplacement,Models609-CandUS636HCCD-1.This task covers:2.16.22.1 Removal2 .16 .2 2 . 2 I n s t a l l a t i o nINITIALSETUPToolsGeneral Mechanic’s AutomotiveTool Kit, Appendix B, Section III,Item 1Solder Gun, Appendix B, Section III,Item 2Material/PartsSolder, Appendix C, Item 25Tags, Appendix C, Item 31Equipment ConditionsPumping station shut down, TM 10-4320-344-10.EquipmentConditions(Continued)Control Panel open (609-C).Control Panel Cover Assembly removed,paragraph 2.16.2 (US636HCCD-1).General Safety InstructionsTo prevent rolling or sliding, do not workon equipment that is not securelys t a b i l i z e d.Do not work on equipment with batteryconnected.Electrocution hazard ispresent if battery is connected.Do not work on equipment without followingstandard shop safety precautions.Battery disconnected, paragraph 2.15.3,(609-C) or 2.15.4 (US636HCCD-1).This procedure applies to the lights dimmer rheostat on Model 609-C. Theprocedure for the Model 609-C auto throttle rheostat and Model US636HCCD-1manual throttle select rheostat is similar.2.16.22.1 Removal.Do not work on equipment with battery connected. Electrocution hazard ispresent if battery is connected. Failure to obey this warning may result indeath or serious personal injury.a .Tag and desolder wires (Figure 2-73, 1).b .Loosen set screw (2) and remove knob (3).c .Remove nut (4), lock washer (5), and rheostat (6) from control panel (7).2.16.22.2 Installation.a .Install rheostat (6) in control panel (7) and secure with lock washer (5) andnut (4).b.Install knob (3) on rheostat (6) and secure with set screw (2).c .Solder wires (1) to rheostat (6). Remove and discard tags.2-187NOTE
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