CONNECTOR 8T0077 - Caterpillar

The condition of charge in the battery at each regular inspection will show if the charging system is operating correctly. An adjustment is necessary when the battery is constantly in a low condition of charge or a large amount of water is needed. A large amount of water would be more than 1 oz of water per a cell per a week or per every 100 service hours.Testing of the charging system components on the engine is preferred, including the wiring and other components that are a permanent part of the system. Off-engine testing or bench testing of the operation of the charging system components is acceptable as a last resort. This testing will give an indication of needed repair. After repairs are made, test the charging system in order to verify that the charging system meets specifications.Test Tools For The Charging System
Table 1
Tools Needed
Part Number Part Name Quantity
225-8266 Ammeter Tool Gp 1
237-5130
or
146-4080 Digital Multimeter Gp
or
Digital Multimeter Gp 1 225-8266 Ammeter Tool Gp
Illustration 1 g02231196
225-8266 Ammeter Tool Gp
The 225-8266 Ammeter Tool Gp is portable. This ammeter is a self-contained instrument that measures electrical currents without breaking the circuit and without disturbing the conductor insulation. The ammeter contains a digital display that is used to monitor current directly within a range between 1 A and 1200 A. In order to view current readings of less than 1 A use the multimeter display. In order to read the multimeter display connect a 6V-6014 Cable between the digital multimeter and the ammeter. The ammeter then sends the current measurement to the multimeter display.A lever opens the ammeter jaws over a conductor. The conductor diameter cannot be larger than 19 mm (0.75 inch).The spring loaded jaws close around the conductor for measuring the current. A trigger switch controls the ammeter. The trigger switch can be locked into the ON position or into the OFF position.After the trigger is turned to the OFF position, the reading appears in the digital display for 5 seconds. This meter accurately measures currents in areas with a limited access. For example, these areas include areas that are beyond the sight of the operator. For DC operation, the ammeter contains a zero control. Batteries inside the handle supply the power.Note: Refer to the user manual for more information about using the 225-8266 Ammeter Tool Gp. 237-5130 Digital Multimeter Gp or 146-4080 Digital Multimeter Gp
Illustration 2 g02231214
237-5130 Digital Multimeter Gp or 146-4080 Digital Multimeter Gp
The 237-5130 Digital Multimeter Gp or the 146-4080 Digital Multimeter Gp is a portable, hand-held service tool with a digital display. This multimeter is built with extra protection against damage in field applications. The multimeter is equipped with 7 functions and 29 ranges. The 237-5130 Digital Multimeter Gp or the 146-4080 Digital Multimeter Gp has an instant ohms indicator. This indicator permits checking continuity for a fast inspection of the circuits. The multimeter can also be used for troubleshooting capacitors that have small values.Note: Refer to the