330D, 336D and 340D Excavators Hydraulic System – Travel on Level Ground – Test

Specification

Note: Certain machines will default to “Economy Mode” at machine startup. Change to “High Hydraulic Power Mode” before performing the test procedure.

Table 1
“Travel on Level Ground – Test”    
Travel Time (time in seconds)    
Travel Speed     New     Rebuild     Service Limit     Actual    
HIGH     Forward     15.2 or less     16.2 or less     17.2 or less        
Reverse
LOW     Forward     24.0 or less     25.5 or less     27.0 or less        
Reverse
Travel Deviation (1) mm (inch)    
Travel Speed     New     Rebuild     Service Limit     Actual    
HIGH     Forward     800 (31.5) or less     1200 (47.2) or less     1500 (59.1) or less        
Reverse    
LOW     Forward     800 (31.5) or less     1200 (47.2) or less     1500 (59.1) or less        
Reverse    
( 1 ) Travel deviation (distance) from the reference line

Introduction

The performance level of the travel motors can be determined with the following procedure.

Note: The engine speed and/or the machine configuration that is used during this test can affect the results of this test. Refer to Testing and Adjusting, “Engine Performance – Test (Engine Speed)” for the engine speed that was used for this test. Refer to Testing and Adjusting, “Operational Checks” for the machine configurations that were used for this test.

Note: The relief valve pressure settings must be set to the relief valve pressure specification before performing this operational check. Refer to Testing and Adjusting, “Specifications”.

Required Tools

Table 2
Required Tools    
Description     Qty    
Measuring Tape     1    
Stopwatch     1    

Machine Preparation




    Illustration 1 g00296317

    (A) Preliminary run 5 m (16.4 ft)

    (B) Travel distance 20 m (65.6 ft)

    (C) Bucket height 0.5 to 1 m (1.6 to 3.3 ft)

  1. Travel distance must be at least 25 m (82 ft) long. Travel test ground must be hard and as level as possible.
  1. Draw a 25 m (82 ft) straight line on travel test ground as a reference line.

Test Procedure

  1. Start the engine.
  1. Place the machine controls at the following settings: Engine speed dial “10” and AEC switch OFF.
  1. Increase the hydraulic oil temperature to 55° ± 5°C (131° ± 9°F).
  1. The bucket should be empty.
  1. Position the machine so that one track is parallel with the reference line. Position the machine for the travel test. Refer to Illustration 1.
  1. Place the travel speed control switch in HIGH position.
  1. Move the machine by operating both travel levers at the same time.
  1. The first 5 m (16.4 ft) are for a preliminary run. Measure the travel time that is required to travel the remaining 20 m (65.6 ft). Measure the time that is required in each direction.
  1. Measure the travel deviation from the reference line.
  1. Place the travel speed control switch on the LOW position and repeat Steps 7 through 9.