SPACER-SPRING 5I8405 - Caterpillar

Table 1
Fault Condition and Possible Causes    
Current At Start-Up     Voltage After About 10 Min Is Below Spec.     Voltage After About 10 Min Is In Spec.     Voltage After About 10 Min Is Above Spec    
Below Specification     Repair alternator (defective regulator, open stator phase, and/or rectifier)     Turn ON all accessories. If voltage drops below spec, repair alternator (open rectifier, and/or stator phase)        
Reached Specification and then tapered OFF     Repair alternator (defective regulator)     Alternator and battery in spec. Turn ON all accessories to verify. Voltage must stay in spec.     Repair alternator (shorted regulator)    
Exceeds Specification and stays high     Check battery per Form SEHS7633-01. Do alternator test again if necessary.     Alternator in spec. Check battery per Form SEHS7633-01.     Repair alternator (shorted regulator). Also check battery for possible damage.    Note: The proper drive pulley is required for the correct alternator output.
Table 2
Tools Needed    
Qty     Part Number     Description    
1     6V-7070     Digital Multimeter    
1     8T-0900     Ammeter Tool Gp    Machine Test
Put the multimeter positive (+) lead on the B+ terminal of the alternator. Put the negative (-) lead on the negative (-) terminal or frame of the alternator. Put the 8T-0900 Ammeter Tool Gp around the positive output wire of the alternator.
Turn OFF all electrical accessories. With the fuel OFF, crank the engine for 30 seconds. Wait 2 minutes to let the starting motor cool. If the system appears to operate at the specifications, crank the engine again for 30 seconds.Note: Cranking the engine for 30 seconds partially discharges the batteries in order to do a charging test. If batteries are already low in charge, skip the Step 2. Jump-start engine or charge batteries as required.
Start the engine and run at full throttle.Note: Full throttle approximates the required drive pulley speed of 5000 rpm.
Immediately check output current. When operating correctly, this initial charging current is equal to or greater than the full output current specification shown below: 8C-5535