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This section provides information on the oil capacity in the gear case and procedures for checking, adding, and draining oil in the gear case. 

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The table displays the traction motor gear case oil capacities for the DC (5GE752AH) and AC (5GEB13) traction motor types. 

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<b>Note:</b> Before checking the gear case lubricant level, the locomotive should be motionless for at least 30 minutes for AC traction motors and 15 minutes for DC traction motors to get an accurate reading. 

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<b>Caution:</b> NEVER permit the gear case lubrication level to run low, as this could result in pinion end bearing (on an AC traction motor), bull gear, and pinion gear failure. 

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Do NOT use any lubricant other than the recommended gear case lubricant as this also could result in component failure. 

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The gear case has a fill opening that is either a solid-fill plug or a spring-loaded plug, located in the lower half of the gear case. 

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Check the lubricant level by looking in the fill opening. 

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If the lubricant is below the fill opening, use the proper dipstick to determine how much lubricant to add. 

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Wipe the dipstick with a clean cloth to remove oil, dirt, and sand before inserting it into the gear case. 

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For AC traction motors, if the gear case requires more than 6.5 quarts (6 L) of lubricant, remove and replace the traction motor combo. 

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For DC traction motors, if the gear case requires more than 4 quarts (3.8 L) of lubricant, remove and replace the traction motor combo.
