ROLLER GP-TRACK-DOUBLE FLANGE 4978958 - Caterpillar

Actuating force ... 24.5 8.9 N (5.51 2.00 lb)Over travel force ... 89 N (20 lb) maximumContact operation ... normally open (1 & 2), normally closed (3 & 4)Parking Brake Limit Switch Adjustment
1. With valve stem (1) fully extended outward, install switch (3) in plate (5) until the wheel just makes contact with the flat spot on block (2).2. Rotate switch (3) clockwise as required until the wheel will roll freely on the incline of block (2).3. Rotate switch (3) clockwise an additional one and one-half turn.4. Tighten jamnut (4) to a torque of ... 10 N m (7 lb ft)