SPRING 7W4650 - Caterpillar

Engine: 3408C (S/N: TAM1-UP; 1TS1-UP) 3412 (S/N: 2WJ1-UP) 3412 DI TA (S/N: 7BL1-UP) 3412C (S/N: 9EP1-UP) 3412C DI TA (S/N: RLR1-UP) 3412C (S/N: 8AR1-UP) 3508 (S/N: 23Z1-UP; 69Z1-UP) 3508B (S/N: BAG1-UP; 3DM1-UP; 3DW1-UP) 3512 (S/N: 50Y1-UP; 24Z1-UP) 3512B (S/N: 8EM1-UP) 3516 (S/N: 27Z1-UP; 29Z1-UP) 3516B (S/N: 9AN1-UP; 2FW1-UP) G3516 (S/N: 4EK1-UP) G3516 SI TA (S/N: CSZ1-UP) G3532 (S/N: 8BZ1-UP)Cold Planer: PR-1000C (S/N: 38S1-UP)Generator Set: 3406 GEN SET (S/N: 4ZR1-UP) 3406C GEN SET (S/N: KPS1-UP) 3406C MARINE GS DI TA (S/N: PFH1-UP)Industrial Engine: 3406B IND DI (S/N: 6TB1-UP) 3406C IND (S/N: 3ER1-UP)Marine Engine: 3406 (S/N: 4TB1-UP) 3406C MARINE (S/N: 1SS1-UP) 3408 (S/N: 99U1-UP) 3408C MARINE (S/N: 9ER1-UP) 3412 (S/N: 60M1-UP)Generator Set Engine: 3408 (S/N: 78Z1-UP) 3412 (S/N: 81Z1-UP)Locomotive Engine: 3516 (S/N: 9KF1-UP)Introduction
Do not perform any procedure in this Special Instruction until you read this information and you understand this information. This Special Instruction is for engines that have the 4W-9733 Governor Control As . If the 4W-9733 Governor Control As does not seem to monitor the engine speed properly, then install the new 234-8717 Switch . The new 234-8717 Switch can now be installed in order to have a more reliable speed sensor. This Special Instruction gives the proper instructions for replacing the 4W-9733 Governor Control As with the 234-8717 Switch .The Procedure for Inside the Engine Mounted Instrument Panel
Illustration 1 g01379728
Loosen the 9X-9675 End Bracket (2). Slide the 9X-9675 End Bracket (2) along the rail as the arrow shows above. Make sure in order to keep the 121-3328 Marker Kit (1) in the current location. Only slide the 9X-9675 End Bracket (2) down the rail. The new space that was just created will allow the space for the new 234-8717 Switch .
Install the 234-8717 Switch on the rail. Install the 234-8717 Switch between the 9X-9675 End Bracket (2) and the 121-3328 Marker Kit (1). This space was created in Step 1 when the 9X-9675 End Bracket was moved down the rail.
Slide the 9X-9675 End Bracket (2) and the new 234-8717 Switch up the rail. Slide the 234-8717 Switch to the 121-3328 Marker Kit (1) .
Slide the 9X-9675 End Bracket (2) to the new 234-8717 Switch . Tighten the screws in order to secure the 9X-9675 End Bracket (2) .
Illustration 2 g01379738
Remove the black wire from terminal five on the 4W-9733 Governor Control As