Travel on Level Ground - Test
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349F and 352F Excavators Hydraulic System
[UENR2955]
349F and 352F Excavators Hydraulic System
Engine Performance - Test - Engine Speed
349F and 352F Excavators Hydraulic System
Travel on Level Ground - Test - Optional Test
HYDRAULIC SYSTEM
MOTOR GP
349F and 352F Excavators Hydraulic System
Machine Drift on a Slope - Check
349F and 352F Excavators Hydraulic System
Travel on Level Ground - Test
349F and 352F Excavators Hydraulic System
Travel on Level Ground - Test - Optional Test
349F and 352F Excavators Hydraulic System
Swing Speed and Overswing on Level Ground - Check
349F and 352F Excavators Hydraulic System
Swing Speed and Swing Drift on a Slope - Check
349F and 352F Excavators Hydraulic System
Relief Valve (Crossover) - Test and Adjust
349F and 352F Excavators Hydraulic System
Automatic Travel Speed Control - Test
1.1. Specification
2.1. Introduction
3.1. Required Tools
4.1. Machine Preparation
5.1. Test Procedure
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| "Travel on Level Ground - Test" | ||||
|---|---|---|---|---|
| Travel Time (time in seconds) | ||||
| Travel Speed | New | Service Limit | Actual | |
| HIGH | Forward | 16.5 or less | 21.5 or less | |
| Reverse | ||||
| LOW | Forward | 20.7 or less | 26.9 or less | |
| Reverse | ||||
| Travel Deviation(1) mm (inch) | ||||
| Travel Speed | New | Service Limit | Actual | |
| HIGH | Forward | 800 (31.5) or less | 1500 (59.1) or less | |
| Reverse | ||||
| LOW | Forward | 800 (31.5) or less | 1500 (59.1) or less | |
| Reverse | ||||
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| (1) | Travel deviation (distance) from the reference line |
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".
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| Required Tools | |
|---|---|
| Description | Qty |
| Measuring Tape | 1 |
| Stopwatch | 1 |
- Travel distance must be at least
25 m (82 ft) long. Travel test ground must be hard and as level as possible. - Draw a
25 m (82 ft) straight line on travel test ground as a reference line.
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| |
| Illustration 1 | g00296317 |
|
(A) Preliminary run (B) Travel distance (C) Bucket height | |
- Start the engine.
- Place the machine controls at the following settings: Engine speed dial "10" and AEC switch OFF.
- Place the hydraulic activation control lever in the UNLOCKED position.
- Increase the hydraulic oil temperature to
55° ± 5°C (131° ± 9°F) . - The bucket should be empty.
- Position the machine so that one track is parallel with the reference line. Position the machine for the travel test. Refer to Illustration 1.
- Place the travel speed control switch in HIGH position.
- Move the machine by operating both travel levers at the same time.
- The first
5 m (16.4 ft) are for a preliminary run. Measure the travel time that is required to travel the remaining20 m (65.6 ft) . Measure the time that is required in each direction. - Measure the travel deviation from the reference line.
- Place the travel speed control switch on the LOW position and repeat Steps 8 through 10.
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