Doosan DX300LC Excavator Travel Speed Test Guide

by Dave Jack Auto Car Repair Knowledge

This instruction show you guide on how to do travel speed test for Doosan DX300LC excavator.

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Travel Speed and Travel Motor Balance (Steering Deviation) Tests
Speed Test
Prepare the excavator for travel speed tests by extending all hydraulic cylinders - boom, arm and bucket - to the fully extended position

The lowest part of the bucket linkage should be 0.3 - 0.5 m (1' -2') off the ground.
Mark off a 20 m (65' 7-1/2") test distance, with a 3 - 5 m (10' -15') run-up area, and a 3 - 5 m (10' - 15', or longer) speed run-off distance.
Travel the excavator back and forth to be sure steering is centered and side frames are parallel with the test course.
Operate both travel levers at the fully engaged position and measure the time it takes to cross 20 m (65' 7-1/2"). Compare measured results against the standard for new machines:

Rotate the turntable 180°. Both tests should be repeated three times. Average all results to obtain a final value.

Travel Deviation
To check steering deviation (travel motor balance), use a long tape or rope, or the edge of an undeviating straight road curb or other marker to verify side to side travel motor uniformity.
Deviation distance should always be measured at the 20 m (65'7-1/2") "finish line." Repeat the test in reverse to measure in both directions, with starting point becoming the finish line, and vice versa. (Figure 5)
A greater amount of deviation is allowed with the travel control set for high speed