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 - Page 143 of 219
TM 9-2350-274-BD
ARMAMENT AND FIRE CONTROL SYSTEM
10-13. PIVOT INTERLOCK SWITCH (Cont).
Materials/Tools:
●
Knife or wire cutter with stripper
●
Electrical tape
Procedural Steps:
1.
Cut wires 37B and 174 and strip 1/4 in. to 1/2 in. on each piece.
2. Twist stripped ends together.
3. Insulate with electrical tape.
10-14. RAMMER TRAY INTERLOCK SWITCH.
General Information:
The purpose of the rammer tray interlock is to prevent the tube from being elevated or depressed while
the rammer tray is in use.
Limitations:
This procedure may not be used if the pivot interlock switch has been by-passed. The rammer loader may
be severely damaged if the gun is elevated or depressed while the rammer tray is in use without an
interlock switch.
Personnel/Time Required:
●
1 soldier
●
2 minutes
Materials/Tools:
●
Knife or wire cutter with stripper
●
Electrical tape
Procedural Steps:
1. Cut wires 1740 and 174A and strip 1/4 in. to 1/2 in. on each piece.
2. Twist stripped ends together.
3. Insulate with electrical tape.
10-15. TRAVERSING MECHANISM DAMAGE.
General Information:
In the event the traversing mechanism becomes so damaged that it is impossible to traverse either under
power or manually, the gun may be traversed using a vehicle to push the tube if the traverse lock is still.
Limitations:
Pushing the tube into position causes reduced accuracy and a reduced rate of fire.
Personnel/Time Required:
●
3 soldiers
●
2 minutes
Materials/Tools:
●
Vehicle
Change 1
10-19
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