How To Check The Continuity Of

Remove the feeder assembly from receiver. Check for continuity through motor between pins J1-L & J2-P and J1-M & J2-K. Is there continuity?_

Disconnect FSS harness J2 from index drive cover assembly (WP 0047 00). Check for continuity between pins P1-P & J2-C and P1-K & J2-D. Is there continuity?_

Replace direct current motor (WP 0061 00).

BOLT POSITION INDICATOR

Replace feeder assembly (WP 0026 00) and send defective feeder assembly to Direct Support Maintenance for repair of index drive cover assembly._

BOLT POSITION INDICATOR

M242 Bushmaster Bolt Position Indicator
CAMPLATE NOTCH

Replace FSS harness (WP 0047 00). If harness is not removable, replace FSS (WP 0045 00).

M242 Bushmaster Bolt Position Indicator
FEED SELECT SOLENOID HARNESS

ELECTRICAL CHECKOUT - Continued

Press sear release link and use hand crank to manually rotate gun. While performing resistance check between pins M & V on motor turret plug, have helper look through bolt position indicator glass and hand crank gun slowly until bolt position indicator enters the EXTRACT zone, and the actuator roller falls into the camplate notch. Did a reading of less than 0.5 ohms occur when the roller fell into the camplate notch?_

Remove the feeder assembly from receiver. Check for continuity through motor between pins J1-V & J2-R and J1-M & J2-K. Is there continuity?

Replace direct current motor (WP 0061 00).

PLUG

ELECTRICAL SEAR SOLENOID

AUTO GUN RECEIVER (BOTTOM VIEW)

SEAR RELEASE LINK (PUSH J)f TO ACTUATE ELECTRICAL fP SEAR SOLENOID)

MOTOR/TURRET

ELECTRICAL SEAR SOLENOID

AUTO GUN RECEIVER (BOTTOM VIEW)

PLUG

MOTOR/TURRET

CAMPLATE NOTCH

ELECTRICAL CHECKOUT - Continued

Johnson Solenoid Exploded ViewJohnson Solenoid Exploded View
J2
Johnson Solenoid Exploded View

ELECTRICAL CHECKOUT - Continued

For standard guns: Electrical checkout complete.

For enhanced guns only: Check for continuity between pins U & M on motor/turret plug. Is there continuity?_

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  • virginia
    How to check the continuity of gun?
    4 years ago

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