TM-9-2350-311-20-2
HOWITZER, MEDIUM, SELF-PROPELLED, 155MM; M109A2, M109A3, M109A4 AND M109A5
TECHNICAL MANUAL; UNIT MAINTENANCE MANUAL FOR CAB, ARMAMENT, SIGHTING AND FIRE CONTROL, ELEVATING AND TRAVERSING SYSTEMS AND ASSOCIATED COMPONENTS
DECEMBER 1993
TM-9-2350-311-20-2 - Page 317 of 828
TM 9–2350–311–20–2
Change 2
6–1
CHAPTER 6
CAB HYDRAULICS
GENERAL
This chapter describes unit maintenance procedures for cab hydraulic system.
CONTENTS
Page
6–1
GAGE ASSEMBLY, SIGHT
6–3
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
6–2
POWER PACK, HYDRAULIC (FLUID LEVEL)
6–7
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
6–3
POWER PACK, HYDRAULIC (DRAINING, FILLING AND CHARGING)
6–9
. . . . . . . . . . . . . . . . . . . . . . .
6–3.1
EQUILIBRATED ELEVATION MECHANISM ASSEMBLY
6–14
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
6–4
POWER PACK STRAINER
6–18
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
6–5
POWER PACK SOLENOID
6–19
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
6–6
PRESSURE SWITCH, HYDRAULIC
6–20
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
6–7
BYPASS VALVE ASSEMBLY
6–21
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
6–8
CLUTCH VALVE
6–23
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
6–9
ACCUMULATOR ASSEMBLY (MANUAL PUMP)
6–25
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
6–10
ACCUMULATOR ASSEMBLY (MAIN)
6–28
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
6–11
ACCUMULATOR ASSEMBLY (PRIMARY)
6–30
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
6–12
ACCUMULATOR ASSEMBLY (SECONDARY)
6–32
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
6–13
EQUILIBRATION MANIFOLD ASSEMBLY
6–34
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
6–14
EQUILIBRATION HANDPUMP ASSEMBLY
6–36
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
6–15
MANUAL ELEVATION PUMP ASSEMBLY
6–38
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
6–16
ELEVATION SELECTOR VALVE ASSEMBLY
6–40
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
6–17
HYDRAULIC FILTER ASSEMBLY
6–42
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
6–18
HYGROSCOPIC BREATHER AND AIR LINE FILTER
6–46
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
6–19
GUNNER’S CONTROL ASSEMBLY
6–48
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
6–20
ASSISTANT GUNNER’S CONTROL ASSEMBLY
6–50
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
6–21
GUNNER’S/ASSISTANT GUNNER’S CONTROL ASSEMBLY HANDLES
6–52
. . . . . . . . . . . . . . . . . . . . .
6–22
LINES AND FITTINGS FROM POWER PACK TO PRESSURE SWITCH AND GAGES
6–54
. . . . . . . . .
6–23
LINES AND FITTINGS FROM CAB TO POWER PACK
6–60
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
6–24
LINES AND FITTINGS FROM HYDRAULIC FILTERS
6–62
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
6–25
LINES AND FITTINGS FROM PRIMARY AND SECONDARY ACCUMULATORS TO
EQUILIBRATED ELEVATING CYLINDER
6–64
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
6–26
LINES AND FITTINGS FROM TRAVERSING MECHANISM
6–68
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
6–27
LINES AND FITTINGS FROM CLUTCH VALVE
6–72
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
6–28
LINES AND FITTINGS FROM MANUAL ACCUMULATOR ASSEMBLY
6–74
. . . . . . . . . . . . . . . . . . . . . . .
6–29
LINES AND FITTINGS FROM ELEVATION SELECTOR VALVE ASSEMBLY
6–76
. . . . . . . . . . . . . . . . . .
6–30
LINES AND FITTINGS FROM ELEVATION EQUILIBRATION CYLINDER
6–80
. . . . . . . . . . . . . . . . . . . .
Back to Top
