. OPERATION OPERATION BRAKE PERFORMANCE CURVE Load: 36 tons 3 - 97 Method of using Exampl e: Down l resistance: -11% [grade resistance: - 13%, rolling resistance: 2% Obtain the maximu m permissible speed and the transmis sion speed range from the graph when traveling d ownhill under the above c 1. Use th e brake performance graph for the downhill dis tance of 1,500 m (4,921 ft) 2. Startin g from p oint (A) which corresponds to the over all weight of the machine, draw a perpendicular line down. 3. Take t he point where it crosses the line for travel res istance -11% as (B) and draw a horizonta l line. 4.
Take t he point where it crosses the performance cur ve as (C), and draw a perpendicular line down. Ta ke the point where thi s line crosses the travel speed scale a 5. The fo llowing i nformation can be obtained from this p From point (D) : Maximum permissible speed = 17 km From point (C) : Speed range = F3 This maximum per missible speed is one guideline determ ined from the retarder brake performance, so on an actual jobsite, de termine a safe travel speed below the maximu m permissible speed to match the conditions of the jobsite so that the retarde r brake oil temperature gauge is alway s in the white range when t raveling.