CAMSHAFT-FUEL PUMP 1295670 - Caterpillar

Introduction
The ""Remove The Old Sensor"" section of this Special Instruction applies to the transmissions or the torque converters with the 144-0178 Speed Sensor or the 3E-6955 Speed Sensor .If the 266-8577 Speed Sensor is already installed, proceed to ""Install The New Sensor"".Important Safety Information
Sudden movement or accidental starting of the machine can cause personal injury or death to persons on or near the machine.To prevent personal injury or death, perform the following:Park the machine on a smooth level surface.Lower the bucket and or attachments to the ground.Stop the engine and engage the parking brake.Block the wheels and install the steering frame lock.Turn the battery disconnect switch to the OFF position and remove the key.Place a Special Instruction, SEHS7332, "Do Not Operate" tag at the battery disconnect switch location to inform personnel that the machine is being worked on.
Care must be taken to ensure that fluids are contained during performance of inspection, maintenance, testing, adjusting and repair of the product. Be prepared to collect the fluid with suitable containers before opening any compartment or disassembling any component containing fluids.Refer to Special Publication, NENG2500, "Caterpillar Dealer Service Tool Catalog" for tools and supplies suitable to collect and contain fluids on Caterpillar products.Dispose of all fluids according to local regulations and mandates.
Remove The Old Sensor
Note: When you replace the old sensor, first disconnect the connector to the speed sensor in order to identify the wires that go to each pin. The wire connections may not be obvious since the wires are potted. In order to reduce the chance for error, cut one wire at a time. Perform a continuity check between the cut wire that is connected to the old connector and the pin on the old connector. Insert one wire at a time into the new connector before going on to the next wire.
On the mating harness connector, identify the wire that is connected to pin A on the old sensor. Identify the wire that is connected to pin B on the old sensor. Identify the wire that is connected to pin C on the old sensor. Refer to Illustration 1. Record each wire color and each wire number.
Label each wire.
Illustration 1 g01223536
Old 144-0178 Speed Sensor
Disconnect the connector and remove the existing 144-0178 Speed Sensor or the 3E-6955 Speed Sensor .
Cut off the existing circular mating harness connector.
Strip off 6 mm (0.250 inch) to 8 mm (0.312 inch) of insulation from each wire.
Crimp a 9X-3402 Socket onto each wire with the 1U-5804 Crimping Tool .
Install each harness wire into the DT connector that is included in the 155-2260 Kit . Refer to Table 1.Note: The orientation of the pins are different on the new DT connector. Refer to Illustration 2.
Table 1
Wire     Connector    
A     Pin A (Power)    
B     Pin B (Return)    
C     Pin C (Signal)    Note: The orientation of the pins on the new DT connector is different.
Illustration 2 g01239728
New 266-8577 Speed Sensor
Insert the green wedge from the 155-2260