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 384 of 828
TM 9–2350–311–20–2
6–62
6–24 LINES AND FITTINGS FROM HYDRAULIC FILTERS
This task covers:
a.
Removal
b.
Installation
INITIAL SETUP
Applicable Configuration
M109A4/M109A5 howitzers
Tools
Artillery and turret mechanic’s tool kit
(SC 5180–95–CL–A12)
Materials/Parts
Caps and plugs (item 7, Appx D)
Plastic bag (item 4, Appx D)
Preformed packings (2) (item 43, Appx G)
Preformed packings (2) (item 44, Appx G)
Tag, marking (item 36, Appx D)
Equipment Condition
Data display (GDU) removed (TM 11–7440–283–12–1)
NBC power control box removed (para 17–4)
Cab power relay box removed (para 8–13)
Discharge hydraulic pressure (para 6–3)
Disconnect electrical power lead and NBC inlet hose to
section chief’s heater (para 8–9)
a.
Removal
WARNING
•
Do not torque hydraulic fittings or perform removal procedures when hydraulic system is pres-
surized. Discharging hydraulic system pressure before performing any maintenance proce-
dures will avoid serious injury to personnel.
•
Eye protection will be worn when performing maintenance procedures on all hydraulic compo-
nents to avoid injury to personnel.
CAUTION
•
All hydraulic lines and ports must be capped to prevent contaminants from entering the hydrau-
lic system and causing internal damage to hydraulic components.
•
All serviceable components must be placed in plastic bags to prevent contamination of hydrau-
lic system during installation.
NOTE
•
All hydraulic lines and components must be tagged before removal for identification during in-
stallation.
•
The removal of hydraulic tubes and fittings must be restricted to those items that are to be re-
placed. Therefore, the legends in this chapter are for identification only.
For removal, follow illustration and legend as a guide. Discard all preformed packings.
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