Usage:
12H (4XM, 5ZM, 8MN, 2LR, 2WR, 4ER, 2GS),
14H (7WJ),
16H (6ZJ, 3JR),
120H (4MK, 5FM, 6NM, 6TM, 2AN, 9FN, 3GR, 9YR),
135H (3YK, 7MM, 8WN),
140H (2ZK, 5HM, 8KM, 8JM, 9TN, 9ZN, 3FR, 3AS),
143H (1AL),
160H (9EJ, 9JM, 3GM, 2FM, 6WM, 3HR, 2HS),
163H (5AK) Motor Graders
Description of Change: A new pressure switch for activating the brake lights on H series Motor Graders, is now available. The new switch contacts provides a longer service life than the former pressure switches contacts.
Adaptable To: The new 166-7781 Pressure Switch is a direct replacement for the former 2M-9346 Pressure Switch used on early H series Motor Graders. The new switch, along with the 3T-1480 Wire Assembly is also used for service replacement of the former 125-9352 Pressure Switch. Manufacturing effectivities of the new pressure switch on certain motor grader models are listed in the following chart.
One end of the 3T-1480 Wire Assembly has two spade terminals that connect to the stud terminals on the 166-7781 Pressure Switch. The other end of the 3T-1480 Wire Assembly has a two pin SureSeal connector housing, for mating with the existing chassis wiring harness on the motor grader. Note the installation torque of the pressure switch is 22 ± 3 N·m (194.7 ± 26.5 lb in). The installation torque of the stud terminal nuts is 1 ± .2 N·m (8.8 ± 1.8 lb in).
