304 Excavator TA2 Technical Inspection{0372, 1000, 7000, 753T, 7565}
- Mini Hydraulic Excavator:
- 304C CR (S/N: FPK1-UP)
Introduction
Inspections are the most basic form of condition monitoring. Inspections are easy to do and surprisingly effective at helping you spot equipment health issues. Proactive monitoring and analysis of equipment information will allow Dealers to intervene effectively before problems occur.
Note: Before adjusting product settings to comply with listed baseline TA2 values, consult SIS for the latest specification values.
Note: Specification values are based on the following machine settings unless stated otherwise
- Engine Speed High Idle
Creating an Electronic Copy
Use the following procedure to create an editable electronic copy from SIS Web.
- Click format to print.
- Save the document as an HTML format.
- Open the document with Microsoft Word.
Electrical System
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| Status (1) | Description | Specification | Actual | Comments |
| Inspect Battery Cables | Cables between the battery, the starter, and the engine ground must be the correct size. Wires and cables must be free of corrosion. Wires and cables must have cable support clamps in order to prevent stress on battery connections (terminals). | |||
| Battery Test | 12.4 VDC or more | Refer to Special Instruction, SEHS7633, "Battery Test Procedure". | ||
| Charging System Test | 13.8 ± 0.5 VDC | Refer to Special Instruction, REHS0354, "Charging System Troubleshooting". | ||
| Electric Starting System Test | Refer to Testing and Adjusting, RENR5547, "Electrical System Troubleshooting". | |||
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| ( 1 ) | N = Normal, M = Monitor, A = Action |
Engine
Cooling System
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| Status (1) | Description | Specification | Actual | Comments |
|---|---|---|---|---|
| Radiator Pressure Relief (Radiator Cap) (2) | - | |||
| Freezing Point of Engine Coolant | - | Use 245-5829 Coolant/Battery Tester Gp . | ||
| Conditioner Test of Engine Coolant | - | Use 8T-5296 Coolant Conditioner Test Kit . | ||
| Belt Tension | 98 N (22 lb) | Mid way between pulleys for all belts. The belt should deflect 8 to 11 mm (0.3 to 0.4 inch). |
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| Difference between the Upper Radiator Tank Temperature and Lower Radiator Tank Temperature | - | |||
| Jacket Water Inlet Temperature from Cooling System | 76.5° ± 1.5°C (169.7° ± 34.7°F) |
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| ( 1 ) | N = Normal, M = Monitor, A = Action |
| ( 2 ) | Test for the pressure that is listed on the cap. |
Basic Engine
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| Status (1) | Description | Specification | Actual | Comments |
| Engine Performance - Test (Engine Speed) | ||||
| No Load High Idle (2) | 2520 to 2620 rpm | |||
| No Load Low Idle | 1030 to 1250 rpm | |||
| No Load Auto Idle | 1030 to 1250 rpm | |||
| Engine speed with load (3) | 2400 rpm (4) | |||
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| ( 1 ) | N = Normal, M = Monitor, A = Action |
| ( 2 ) | Low idle switch in the OFF position |
| ( 3 ) | Pressure is relieved from both pumps (stall condition). |
| ( 4 ) | Minimum rpm |
Air Inlet and Exhaust System
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| Status (1) | Description | Specification | Actual | Comments |
| Inlet Manifold Pressure - Test | ||||
| Cylinder # 1 Exhaust Temperature (2) | ||||
| Cylinder # 2 Exhaust Temperature (2) | ||||
| Cylinder # 3 Exhaust Temperature (2) | ||||
| Cylinder # 4 Exhaust Temperature (2) | ||||
| Cylinder # 5 Exhaust Temperature (2) | ||||
| Cylinder # 6 Exhaust Temperature (2) | ||||
| Cylinder # 7 Exhaust Temperature (2) | ||||
| Cylinder # 8 Exhaust Temperature (2) |
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| ( 1 ) | N = Normal, M = Monitor, A = Action |
| ( 2 ) | Compare the exhaust temperature variance at each exhaust port. |
Performance Checks
ReferenceRefer to Testing & Adjusting, RENR9635, "Operational Checks" for more detail on the following test.
Operational Checks
Travel on Level Ground - Test
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| Status (1) | Description | Specification | Actual | Comments | |
|---|---|---|---|---|---|
| Rubber Track | Steel Track | ||||
| Travel Time for 30 m (98.4 ft) (time in seconds) (2) |
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| High Forward | 13.6 to 17.7 | 14.8 to 16.8 | |||
| High Reverse | 13.6 to 17.7 | 14.8 to 16.8 | |||
| Low Forward | 24.7 to 30.0 | 26.0 to 28.4 | |||
| Low Reverse | 24.7 to 30.0 | 26.0 to 28.4 | |||
| Travel Deviation - Check | |||||
| High Forward | 1000 mm (39.4 inch) |
1000 mm (39.4 inch) |
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| High Reverse | 1000 mm (39.4 inch) |
1000 mm (39.4 inch) |
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| Low Forward | 1000 mm (39.4 inch) |
1000 mm (39.4 inch) |
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| Low Reverse | 1000 mm (39.4 inch) |
1000 mm (39.4 inch) |
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| ( 1 ) | N = Normal, M = Monitor, A = Action |
| ( 2 ) | First 10 m (32.8 ft) is preliminary. Measure travel time for remaining 20 m (65.6 ft). |
Travel on Level Ground - Test (Optional Test)
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| Time for Three Revolutions (time in seconds) | ||||||
|---|---|---|---|---|---|---|
| Status (1) | Description | Specification | Actual | Comments | ||
| Rubber Track | Steel Track | Right | Left | |||
| High Forward | 11.2 to 14.0 | 11.5 to 13.5 | ||||
| High Reverse | 11.2 to 14.0 | 11.5 to 13.5 | ||||
| Low Forward | 20.1 to 24.2 | 20.3 to 22.7 | ||||
| Low Reverse | 20.1 to 24.2 | 20.3 to 22.7 | ||||
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| ( 1 ) | N = Normal, M = Monitor, A = Action |
Machine Drift on a Slope - Check
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| Status (1) | Description | Specification | Actual | Comments |
|---|---|---|---|---|
| Machine Drift (mm (inch)) (2) | 0 |
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| ( 1 ) | N = Normal, M = Monitor, A = Action |
| ( 2 ) | After 3 minutes |
Swing Speed and Overswing on Level Ground - Check
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| Status (1) | Description | Specification | Actual | Comments |
|---|---|---|---|---|
| Swing Time (three revolutions) (seconds) | ||||
| Right Swing (2) | 2.5 or less | |||
| Left Swing (2) | 2.5 or less | |||
| Continuous swing right | 20.3 ± 1.4 or less | |||
| Continuous swing left | 20.3 ± 1.4 or less | |||
| Overswing (3) (mm (inch)) | ||||
| Right Swing | 210 mm (8.3 inch) or less |
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| Left Swing | 210 mm (8.3 inch) or less |
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| ( 1 ) | N = Normal, M = Monitor, A = Action |
| ( 2 ) | 90 degree swing operation |
| ( 3 ) | Loaded bucket weight 180 kg (397 lb) |
Swing Speed and Swing Drift on a Slope - Check
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| Status (1) | Description | Specification | Actual | Comments |
|---|---|---|---|---|
| Swing Speed on a Slope (90 degree swing) (seconds) | ||||
| Right Swing | 2.5 or less | |||
| Left Swing | 2.5 or less | |||
| Swing Drift (mm (inch)) (2) | ||||
| Right Swing | 0 | |||
| Left Swing | 0 | |||
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| ( 1 ) | N = Normal, M = Monitor, A = Action |
| ( 2 ) | Loaded bucket weight is 210 kg (463 lb) |
Cylinder Drift - Check
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| Status (1) | Description | Specification | Actual | Comments |
|---|---|---|---|---|
| Loaded Bucket (mm (inch)) (3 minutes) (2) | ||||
| Boom Cylinder | 2 mm (0.1 inch) or less |
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| Stick Cylinder | 5 mm (0.2 inch) or less |
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| Bucket Cylinder | 5 mm (0.2 inch) or less |
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| Blade Cylinder | 2 mm (0.1 inch) or less |
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| Boom Swing Cylinder (3) | 2 mm (0.1 inch) or less |
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| ( 1 ) | N = Normal, M = Monitor, A = Action |
| ( 2 ) | Weight of bucket load is 210 kg (463 lb) |
| ( 3 ) | Position the machine on a slope of 12 degrees |
Cylinder Speed - Check
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| Status (1) | Description | Specification | Actual | Comments |
|---|---|---|---|---|
| Boom Extension | 2.6 ± 0.4 sec | |||
| Boom Retraction | 2.7 ± 0.4 sec | |||
| Stick Extension | 3.2 ± 0.4 sec | |||
| Stick Retraction | 2.6 ± 0.4 sec | |||
| Bucket Extension | 3.1 ± 0.4 sec | |||
| Bucket Retraction | 2.0 ± 0.4 sec | |||
| Blade Extension | 1.1 ± 0.4 sec | |||
| Blade Retraction | 1.0 ± 0.4 sec | |||
| Boom Swing Extension (with stop) |
5.3 ± 0.4 sec | |||
| Boom Swing Retraction (with stop) |
5.4 ± 0.4 sec | |||
| Boom Swing Extension (without stop) |
5.8 ± 0.4 sec | |||
| Boom Swing Retraction (without stop) |
5.9 ± 0.4 sec |
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| ( 1 ) | N = Normal, M = Monitor, A = Action |
Hydraulic System
ReferenceRefer to Testing & Adjusting, RENR9635, "Hydraulic Systems" for more detail on the following test.
Relief Valve (Pilot) - Test and Adjust
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| Status (1) | Description | Specification | Actual | Comments |
| Relief Valve (Pilot) | 3400 ± 200 kPa (493 ± 30 psi) |
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| ( 1 ) | N = Normal, M = Monitor, A = Action |
Accumulator (Pilot) - Test and Charge
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| Status (1) | Description | Specification | Actual | Comments |
| Pilot Accumulator | 1035 kPa (150 psi) |
Should stay above 1035 kPa (150 psi) within 1 minute. |
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| ( 1 ) | N = Normal, M = Monitor, A = Action |
Relief Valve (Main) - Test and Adjust
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| Status (1) | Description | Specification | Actual | Comments |
| Main Relief Valve Pressure at HIGH IDLE | 24500 to 26000 kPa (3550 to 3800 psi) |
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| ( 1 ) | N = Normal, M = Monitor, A = Action |
Relief Valve (Line) - Test
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| Status (1) | Description | Specification | Actual | Comments |
| Boom Extended | 27250 ± 700 kPa (3952 ± 101 psi) |
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| Boom Retracted | ||||
| Stick Extended | ||||
| Stick Retracted | ||||
| Bucket Extended | ||||
| Bucket Retracted |
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| ( 1 ) | N = Normal, M = Monitor, A = Action |
Relief Valve (Swing) - Test
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| Status (1) | Description | Specification | Actual | Comments | |
| Swing Relief Valve (Left Swing) | 21900 to 24900 kPa (3176 to 3611 psi) |
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| Swing Relief Valve (Right Swing) | 21900 to 24900 kPa (3176 to 3611 psi) |
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| ( 1 ) | N = Normal, M = Monitor, A = Action |
S.O.S
ReferenceRefer to Operation and Maintenance Manual, SEBU8021, "Maintenance Interval Schedule" for more detail on the following S.O.S.
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| Status (1) | Description | Obtain | Comments |
| Engine Oil Sample | |||
| Engine Coolant Sample I | |||
| Engine Coolant Sample II | |||
| Hydraulic Oil Sample | |||
| Right Final Drive Oil Sample | |||
| Left Final Drive Oil Sample | |||
| Swing Drive Oil Sample |
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| ( 1 ) | N = Normal, M = Monitor, A = Action |
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