TM-9-2350-274-BD

M109/M110/M578 VEHICLES HOWITZER, MEDIUM, SELF-PROPELLED FULL-TRACKED

TECHNICAL MANUAL; OPERATORS, ORGANIZATIONAL DIRECT SUPPORT AND GENERAL SUPPORT MAINTENANCE

JANUARY 1984
TM-9-2350-274-BD

  TM-9-2350-274-BD - Page 135 of 219

TM 9-2350-274-BD
ARMAMENT AND FIRE CONTROL SYSTEM
10-8. TURRET INTERCHANGEABILITY (M109 FAMILY).
General Information:
Removal of the complete cab of an M109 requires a lifting capacity of at least 15,000 pounds. Turrets on
the M109 are interchangeable only within the M109 family itself. Turrets with five slip ring contact arm
assemblies can replace models with three, but not the other way around. M109, M109A1, M109A3 and
M109A4 vehicles through serial no. 1122 have three slip ring contact arm assemblies, two slip ring seg-
ments, and a slip ring cover. M109, M109A1, M109A3 and M109A4 vehicles after serial no. 1122 and all
M109A2 and M109A5 vehicles have five slip ring contact arm assemblies, one slip ring segment and no
slip ring cover.
10-8.1. TURRET INTERCHANGEABILITY (M110 FAMILY).
General Information:
Removal of the complete turret of an M 110 series requires a lifting capacity of at least 15,000 pounds.
Turrets on the M 110 series are interchangeable only within the M 110 family itself.
10-8.2. WINCH\BOOM INTERCHANGEABILITY (M578 Recovery Vehicle).
General Information:
The quickest method of repair for a damaged boom may be to cannibalize replacement parts from
disabled vehicles. There are some minor differences in certain components of the vehicles listed below, but
they will function. Cannibalize the required component from another vehicle as available. Boom compo-
nents of the M578 Recovery Vehicle are interchangeable with those of the following vehicles:
a. Traversing Drive Unit: M107, M110, M110A1, M110 series.
b. Turret Bearing Ring: M107, M110, M110A1, M110 series, M578.
The following items may be cannibalized from other areas of the M578 Recovery Vehicle in order to
make the more critical area operable. Note that the items will work; however, the mission capabilities will
be degraded.
a. Boom Winch Hydraulic Motor is directly interchangeable with the Tow Winch Hydraulic Motor.
b. Boom Winch Hydraulic Relief Valve, 1525 psi, PN 12253778-1: interchangeable with Boom Cylinder
and Two Winch Hydraulic Relief Valve, 2275 psi, PN 12253778-1.
c. Check Valve, 2 psi, PN 12253779-1: interchangeable with Check Valve, 5 psi, PN 12253779-2.
Change 3
10-11


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