Perform Safety Checks on an M224 60-mm Mortar

Task 071-323-4104

Conditions

Given a mounted M224 60-mm mortar complete with sight.

Standards & Safety

Make the safety checks to ensure the mortar is safe to fire.
Be careful with the sight, it's got Tritium gas in it which is radio active.

Training/Evaluation

Training Information Outline

1. Check for mask and overhead clearance as follows:

  a. To determine mask clearance, lower the barrel to 0800 mils elevation and sight along top of the barrel with eye near baseplate.

  b. To determine overhead clearance, raise barrel to 1500 mils elevation and sight along top of the barrel with eye near baseplate.

     NOTE: If full range of elevation cannot be obtained, raise or lower barrel until rounds clear obstruction, turn elevation knob on sight until bubble is level, read the elevation, and report it to the squad leader who, in turn, reports it to the FDC.

2. Make sure the barrel is locked to the baseplate, the open end of the socket points in the direction of fire, and the handle assembly is up

3. Check the yoke coupling.

  a. Make sure the coupling knob is seated and hand tight

  b. Make sure the coupling is properly seated in the appropriate saddle.

    (1) Low saddle for elevations: 1101 to 1511 mils.

    (2) High saddle for elevations: 0800 to 1100 mils.

4. Check that the spread cable is not tangled and is taunt between the legs.

5. Check that the locking nut on the bipod leg is hand-thight.

6. Check that the selector is on drop-fire.

Evaluation Preparation

Setup: At the site, provide all equipment and information given in the task conditions statement.

Brief Soldier: Tell the soldier that, using the equipment and information provided, he must perform safety checks on a 60-mm mortar.

Evaluation Guide

PERFORM SAFETY CHECKS ON AN M224 60-MM MORTAR--071-323-4104
Performance Measures		Results
	The following requirements must be met to perform safety checks on an M224 60-mm mortar.
1.	Checks mask on overhead clearance.	P	F
2.	Checks the barrel to ensure that it was locked to the baseplate.	P	F
3.	Checks that the yoke coupling knob it tight.	P	F
4.	Checks that the spread cable is taunt between the legs.	P	F
5.	Checks the locking nut on the bipod is tight.	P	F

Feedback

Score the soldier a GO if all steps are passed (P).
Score the soldier a NO-GO if any step(s) are failed (F).
If the soldier fails any step(s), show what was done wrong and how to do it correctly.

References

FM 23-36

NAVIGATION SECTION

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