Komatsu HD465-8, Operation & Maintenance Manual

Page: 243 / 420

Obtain the maximum permissible speed and the gear speed range from the graph when traveling downhill under
the above conditions.
1.
Use the brake performance curve for downhill distance of 1500 m.
2.
Starting from the point (A) which corresponds to the gross machinery weight, draw a perpendicular line
down.
3.
Take the point where it crosses the line -11 % for travel resistance as (B) and draw a horizontal line.
4.
Take the point where it crosses the performance curve as (C), and draw a perpendicular line down. Take
the point where this line crosses the travel speed scale as (D).
5.
The following information can be obtained from this procedure.
The maximum permissible speed is “29.8 km/h” from the point (D).
The gear speed is “F3” from the point (C).
This maximum permissible speed is a reference obtained from the retarder brake performance. Determine a
safe travel speed to be below the maximum permissible speed to match the conditions of the jobsite so that the
retarder brake oil temperature gauge is always in the green range when traveling.
OPERATION MACHINE OPERATIONS AND CONTROLS
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