TM 5-3820-205-10-2
42.
Conveyor Belts Do Not Run, or Run at Uneven Speed
Probable cause
Possible remedy
Too much slack in belts ................................................. Adjust the conveyor belts (fig. 61).
Overload device in motor circuit tripped ........................ Correct the cause of overload, and reset the circuit breaker or
magnetic starter.
Belt roller bearings frozen ............................................. Inspect the bearing for this condition. Report defective rollers
to organizational maintenance
Lagging on drive pulley worn out or loose ...................... Report damaged lagging to organizational maintenance.
Grease has collected on drive sheave or belt ................ Remove grease from drive sheave and belt with approved
cleaning solvent.
43.
Conveyor Belts Run to One Side
Probable cause
Possible remedy
Drive pulleys are loose or out of alignment .................... Report condition to organizational maintenance.
Troughing and under conveyor rollers out
of adjustment .......................................................... Report condition to organizational maintenance.
Belt lacing torn, loose, or broken at one end .................. Report condition to organizational maintenance.
Dirt or foreign matter built-up on belt
pulleys, rollers, or conveyor belt .............................. Inspect the belt pulley and rollers for dirt or foreign matter.
Remove the accumulated deposits and clean with an ap-
proved cleaning solvent.
44.
Crusher Jaw Not Operating Correctly
Probable cause
Possible remedy
Crusher jaw adjustment incorrect .................................. Adjust crusher jaw (figs. 53 and 54).
Crusher jaw drive belts slipping ..................................... Report condition to organizational maintenance.
Engine clutch slips ......................................................... Report condition to organizational maintenance.
45.
Screen Will Not Vibrate
Probable cause
Possible remedy
Drive belts slipping or broken ........................................ Adjust V-belts (figs. 58 and 59). Report broken V-belts to orga-
................................................................................
nizational maintenance.
Motor circuit breaker or magnetic starter trips ................ Correct cause of tripping or report to organizational mainte-
................................................................................
nance.
46.
Screen Vibrates Excessively
Probable cause
Possible remedy
Rubber mounts broken or deteriorated .......................... Report condition to organizational maintenance.
Motor drive belts slipping .............................................. Adjust V-belts (figs. 58 and 59).
47.
Feeder Will Not Operate or Works Slowly
Probable cause
Possible remedy
Drive belts slipping or broken ........................................ Inspect V-belts for slipping and adjust as required (fig. 60). Re-
port broken V-belts to organizational maintenance.
Motor circuit breaker or magnetic switch tripped,
continues to trip ...................................................... Correct cause of tripping or report to organizational
maintenance.
Frozen bearing in feeder rollers ..................................... Report condition to organizational maintenance.
48.
Electric Motors Will Not Run
Probable cause
Possible remedy
Circuit breaker or relay overload tripped ........................ Reset circuit breaker or relay overload (para 16).
Voltage source fluctuating ............................................. Report condition to organizational maintenance.
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