TM 55-1930-209-14&P-13 Table 2-2.  Bridge Crane Troubleshooting (Continued) Condition Possible Cause Suggested Action 5 Cable reel does not extend or a. Cable reel improperly a. Check that reel drum is center retract mounted line to cable fun b. Reel ratchet spring and b. Remove and replace reel up lack proper tension assembly c. Reel assembly not c. Remove slip ring cover, ensure electrically grounded ground wire is properly connected Repair as necessary. (See manufacturer's service manual SM-3120-04-LL, page 3, for component location) 6 2-ton trolley hoist brake does a. Power panel 1 circuit a. Close (ON) circuit breaker not release breaker 6P5 open (OFF) b. Electrical power not b. Remove brake cover, check for reaching brake magnet any broken wires leading to assembly magnet assembly  Repair as required c. Low voltage to brake c. With power off and using a magnet continuity meter, check wiring. Repair or replace as necessary 7 Trolley hoist does not stop Brake release did not Remove brake cover plate and when hand-held controls are reset to normal position inspect for damage or broken released parts.  If brake is defective, replace brake assembly 8 Bridge crane interlocks do not a. Safety stops binding a. Adjust stops and/or replace retract defective stops as required b. Pull rod on connector b. Check pull rod for proper interlock assembly bent condition. Remove and replace or broken as required c. Operator wheel on crane c. Check operator wheel assembly interlock and operator for proper operation.  Adjust or assembly binding warped, replace components as or out of adjustment required 2-16.2   Repair or replacement of bridge crane system components WARNING Shut down bridge crane system before attempting maintenance.  Be sure to open (OFF) circuit breaker 6P5 on power panel 1.  Red tag circuit breakers with: "WARNING - DO NOT ACTIVATE REPAIRS BEING MADE." 2-20