TM-9-2350-311-20-2 Maintenance Manual Volume 2 for M109 Cab Download
Page 425 of 828
TM 9–2350–311–20–2 8–1 CHAPTER 8 CAB ELECTRICAL SYSTEM GENERAL This chapter describes unit level maintenance procedures for the cab electrical system. Step-by-step procedures are pro- vided for maintaining electrical leads and harnesses, electrical components, and the intercommunications system. CONTENTS Page Section I. ELECTRICAL LEADS AND HARNESSES 8–1 WIRING HARNESS AND CABLE REPAIR 8–2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8–2 GUNNER’S SELECTOR SWITCH BOX WIRING HARNESS 8–12 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8–3 PANORAMIC TELESCOPE TO DOME LIGHT LEAD ASSEMBLY 8–16 . . . . . . . . . . . . . . . . . . . . . . . . . . . 8–4 CAB POWER LEAD ASSEMBLY 8–24 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8–5 POWER RELAY BOX TO PUMP MOTOR LEAD ASSEMBLY 8–28 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8–6 POWER RELAY BOX TO PRESSURE SWITCH WIRING HARNESS 8–31 . . . . . . . . . . . . . . . . . . . . . . . . 8–7 CAB TRAVERSING MECHANISM HARNESS 8–34 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8–8 GUNNER’S ELEVATION CONTROL SWITCH LEAD ASSEMBLY 8–38 . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8–9 NBC POWER LEAD ASSEMBLY 8–42 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8–10 NBC GROUND LEAD 8–46 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Section II. COMPONENT MAINTENANCE 8–11 DOME LIGHT ASSEMBLIES 8–47 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8–12 GUNNER’S SELECTOR SWITCH BOX ASSEMBLY 8–52 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8–13 POWER RELAY BOX ASSEMBLY 8–60 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Section III. INTERCOMMUNICATIONS SYSTEM 8–14 POWER RELAY BOX TO INTERCOM POWER SUPPLY LEAD ASSEMBLY 8–67 . . . . . . . . . . . . . . . . . . 8–15 POWER SYSTEM WIRING HARNESS (INTERCOM) 8–70 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8–16 AMPLIFIER AND CONTROL BOX 8–77 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .