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Potential Problem
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Possible Reason
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Solution
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No voltage going to the clutch.
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Wiring connector not seated properly.
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Pull apart and re-seat connector.
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No voltage or low voltage coming from the battery.
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Check with voltmeter, battery should be 8-16 volts. (Assuming 12
volt battery.)
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Defective charging system.
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Fix charging system.
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Lead wire cut or broken internally.
(Example)
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Fix or replace lead wire. If destroyed, replace clutch.
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Fuse blown.
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Replace fuse.
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Defective switch operating clutch.
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Replace the switch.
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If voltage is going to the clutch, but the clutch will still
not engage.
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Coil open or shorted.
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Check coil with ohmmeter. A range close to 3 to 4 ohms should be
present at an ambient coil temperature of 70\uffffF. Replace coil.
(Example)
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Check coil voltage to make sure it is compatible with the voltage coming
in. (If voltage is too high, this could cause the coil to burn out.)
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Change battery or coil to meet your requirement. |
Burnt out coil caused by frictional contact (rotor strike). If so, coil will be discolored, can
be cracked, burnt or epoxy can be melted.
(Example 1, Example 2)
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Replace coil.
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Clutch engages, but load will not engage.
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Rivets or springs broken.
(Example)
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Replace clutch.
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Key missing.
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Put in key.
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Armature could be warped because of heat due to slippage. This means it
will pull in, but will slip when a load is supplied. Clutch should
show signs of heat.
(Example)
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Replace clutch and determine why it slipped.
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