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 79 of 828
TM 9–2350–311–20–2
2–18
Change 2
Section III.
PREVENTIVE MAINTENANCE CHECKS AND SERVICES (PMCS),
LUBRICATION INSTRUCTIONS, AND MANDATORY REPLACEMENT PARTS
2–8
LUBRICATION
2–8.1
General
All lubrication procedures applicable to the unit maintenance level have been integrated within the PMCS procedures
found in Table 2–2, Preventive Maintenance Checks and Services for M109 Self-Propelled Howitzer. Information on autho-
rized lubricants, lubrication intervals, man-hour requirements, the Army Oil Analysis Program, and other areas pertinent to
lubrication may be found in the remainder of para 2–8.
2–8.2
Lubrication Intervals
Lubrication procedures are integrated within the PMCS procedures in accordance with the interval in which performance is
required. For example, a lubrication required annually is incorporated with the annual preventive maintenance proce-
dures. The “Interval” column of the PMCS table indicates the appropriate interval for performing lubrication.
Oil and filters are to be changed whenever they are known to be contaminated or clogged.
When AOAP analysis service is available, change oil and filters at the direction of the AOAP laboratory.
When AOAP analysis service is not available, change oil and filters at 75 hours or 750 miles of operation.
Always lubricate after water fording.
Use Table 2–1, Expected Temperature Lubrication Table, to determine seasonal lubrication requirements. When changing
engine and transmission oil due to seasonal requirements always change the oil filters.
The following lubrication interval symbols shall be used on illustrations, as applicable.
Q – quarterly
A – annually
AOAP – Upon direction of Army Oil Analysis Program
RDS – Rounds fired
2–8.3
Cleaning
WARNING
Solvents can burn easily, can give off harmful vapors, and are harmful to skin and clothing. To avoid
injury or death, keep away from open fire and use in well-ventilated area. If solvent gets on skin or
clothing, wash immediately with soap and water.
Clean parts with cleaning compound (item 9.1, Appx D).
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