12M Series 3, 140M Series 3, 160M Series 3, 140, 150 and and 160 Motor Graders Centershift Lock Caterpillar


Centershift Lock
`

------ WARNING! ------

Be sure to ground moldboard before retracting centershift lock pin. Failure to ground the moldboard can cause personal injury or death.




Illustration 1g02164089
(1) Solenoid for the centershift lock
(2) Centershift lock cylinder

Centershift lock cylinder (2) is located on the rear of the link bar. When the centershift lock cylinder (2) is not engaged, the link bar and the circle can be moved. The link bar and the circle can be moved in order to place the blade in the correct position. When the centershift lock cylinder (2) is engaged, the link bar and the circle will not move sideways.



Illustration 2g02170233
(3) Centershift lock switch

Centershift lock switch (3) is located on the console to the right of the operator. This switch sends an electrical signal to solenoid (1) for the centershift lock. Solenoid (1) will direct oil to either side of centershift lock cylinder (2). The machine is normally operated with the centershift lock pin in the LOCK position.

Reference: For more information on operation of the centershift lock switch, refer to Operation and Maintenance Manual, "Centershift Lock Switch".

The lock pin cannot be seen by the operator. A centershift indicator shows the operator when the lock pin is in alignment with the correct hole in the lock plate. The centershift lock indicator is located on the right side of the link bar.



Illustration 3g03586298
(1) Solenoid for the centershift lock
(2) Centershift lock cylinder
(3) Centershift lock switch
(4) Centershift lock/Blade cushion fuse
(5) Fuse block A

Implement pilot oil is directed to the centershift lock when the implement lockout switch is engaged. When solenoid (1) is de-energized, pilot oil will be directed to the head end of the centershift lock cylinder (2). Cylinder (2) will travel to the end of the stroke. The cylinder rod will hold the blade circle in position.



Illustration 4g03530249
(1) Solenoid for the centershift lock
(2) Centershift lock cylinder
(3) Centershift lock switch
(4) Centershift lock/Blade cushion fuse
(5) Fuse block A

Implement pilot oil is directed to the centershift lock when the implement lockout switch is engaged. When solenoid (1) is energized, pilot oil will be directed to the rod end of the centershift lock cylinder (2). Cylinder (2) will travel to the end of the stroke. The retracted cylinder rod will release the blade circle from a fixed position.

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