BUSHING 1161365 - Caterpillar

System Operation Description:
Table 1
Alternator Rating    
   Peak Current Rating    Minimum Peak Current    
24 V Alternator    
5N-5692     45     41     Often when problems with the charging system are being investigated, the alternator is not the problem. If a low battery condition is present test the batteries first. See Special Instruction, SEHS7633, "Battery Test Procedure" for more information. If the engine cranks slowly, then test the starting system. See Service Magazine, SEPD0020, "Testing The Starter On The Engine" for more information. Note: Severely discharged batteries can cause low system voltage. Severely discharged batteries can occur even while the engine is running above idle, and the alternator is working properly. Proper low engine idle is also important.Test Step 1. CHECK THE SYSTEM VOLTAGE.
Before you start the generator set, connect a voltmeter between the "B+" terminal and the case of the alternator. Disconnect all loads from the battery. Disconnect the battery voltage to the EMCP II.
Turn the disconnect switch to the ON position but do not start the engine. Read the voltage on the voltmeter. Make a note of the voltage that was measured.Expected Result:This voltage should be approximately system voltage. Results:
YES - The voltage is approximately system voltage. Proceed to test step 2.
NO - The voltage is less than system voltage. Proceed to test step 4.Test Step 2. CHECK THE OPERATION OF THE ALTERNATOR.
The voltmeter remains connected between the "B+" terminal and the case of the alternator.
Start the generator set. Set the throttle to at least 75 percent. Read the voltage on the voltmeter. Make a note of the voltage that was measured.Expected Result:The voltage measurement is greater than the voltage that was recorded in the previous test step "Check The System Voltage".Results:
VOLTAGE HIGHER - The voltage measurement is greater than the voltage that was observed in the previous test step "Check The System Voltage". The voltage is also less than the maximum voltage that is listed in the specifications for the alternator. The alternator is partially charging the battery. Proceed to test step 3.
VOLTAGE TOO HIGH - The voltage measurement is greater than the voltage that was observed in the previous test step "Check The System Voltage". The voltage is also greater than the maximum voltage that is listed in the specifications for the alternator. The alternator is over charging. Proceed to test step 16.
VOLTAGE LOWER - The voltage is not higher than the voltage that was observed in the previous test step. Proceed to test step 4.Test Step 3. TEST THE ALTERNATOR OUTPUT.Note: For the proper output current, refer to table 1.
Ensure that the batteries are NOT fully charged.Note: A fully charged battery may have open circuit voltage above25 V on 24 V systems.
If the batteries are fully charged, then crank the engine for 30 seconds. This action reduces the battery voltage.
Connect the 9U-5795 Current Probe to a DMM (digital multimeter) or use a 225-8266 Ammeter Tool Gp . The multimeter must have a peak hold feature. Clamp the probe around the