Cylinder Speed - Check
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" for the engine speed that was 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     | ||
Part Number     | Description     | Qty     |
    | Stopwatch     | 1     |
- Perform the following steps in order to test the operating speed of the boom cylinders.
- Start the engine.
Show/hide tableIllustration 1 g01187151
(A) Extension test
(B) Retraction test
- Place the machine on level ground.
- Increase the hydraulic oil temperature to 55° ± 5°C (131° ± 9°F).
- Empty the bucket.
- Fully retract the bucket cylinder and fully retract the stick cylinder. Refer to Illustration 1.
- Position the bucket on the ground. With a stopwatch, measure the time that is required to fully extend the boom cylinders.
Note: Do not include the time of the snubber operation of the boom cylinders.
- Position the boom cylinders at full extension. With a stopwatch, measure the time that is required for the bucket to come in contact with the ground.
- Refer to the specifications in Table 3 for the operating speed of the boom cylinders.
- Perform the following steps in order to test the operating speed of the stick cylinder.
- Start the engine.
Show/hide tableIllustration 2 g01187149
(A) Extension test
(B) Retraction test
- Place the machine on level ground.
- Increase the hydraulic oil temperature to 55° ± 5°C (131° ± 9°F).
- Empty the bucket.
- Position the upper surface of the boom parallel to the ground.
- Fully extend the bucket cylinder. Refer to Illustration 2.
- Fully retract the stick cylinder. With a stopwatch, measure the time that is required to fully extend the stick cylinder.
- Fully extend the stick cylinder. With a stopwatch, measure the time that is required to fully retract the stick cylinder.
Note: Do not include the time of the snubber operation of the stick cylinders.
- Refer to the specifications in Table 3 for the operating speed of the stick cylinder.
- Perform the following steps in order to test the operating speed of the bucket cylinder.
- Start the engine.
Show/hide tableIllustration 3 g01187147
(A) Extension test
(B) Retraction test
- Place the machine on level ground.
- Increase the hydraulic oil temperature to 55° ± 5°C (131° ± 9°F).
- Empty the bucket.
- Position the upper surface of the boom parallel to the ground.
- Position the stick so that the stick is perpendicular to the ground. Refer to Illustration 3.
- Fully retract the bucket cylinder. With a stopwatch, measure the time that is required to fully extend the bucket cylinder.
- Fully extend the bucket cylinder. With a stopwatch, measure the time that is required to fully retract the bucket cylinder.
- Refer to the specifications in Table 3 for the operating speed of the bucket cylinder.
- Perform the following steps in order to test the operating speed of the blade cylinder.
- Start the engine.
Show/hide tableIllustration 4 g01187145
(A) Extension test
(B) Retraction test
- Place the machine on level ground.
- Increase the hydraulic oil temperature to 55° ± 5°C (131° ± 9°F).
- Position the stick so that the stick is perpendicular to the ground.
- Lower the stick to the ground. Refer to Illustration 4.
- Fully retract the blade cylinder. With a stopwatch, measure the time that is required to lower the blade to the ground.
- Position the blade on the ground. With a stopwatch, measure the time that is required to fully retract the blade cylinder.
- Refer to the specifications in Table 3 for the operating speed of the blade cylinder.
- Perform the following steps in order to test the operating speed of the boom swing cylinder.
- Start the engine.
Show/hide tableIllustration 5 g01187054
View from top of machine
(A) Extension test
(B) Retraction test
- Place the machine on level ground.
- Increase the hydraulic oil temperature to 55° ± 5°C (131° ± 9°F).
- Position the stick so that the stick is perpendicular to the ground.
- Fully retract the boom swing cylinder. With a stopwatch, measure the time that is required to fully extend the boom swing cylinder.
- Position the boom swing against the swing stop. With a stopwatch, measure the time that is required to fully retract the boom swing cylinder.
- Refer to the specifications in Table 3 for the operating speed of the boom swing cylinder.
Show/hide table
Cylinder Operating Speed     | ||
---|---|---|
Item     | Specification     | |
Boom     | Extension     | 2.5 ± 0.5 sec     |
Retraction | N/A     | |
Stick     | Extension     | 3.0 ± 0.5 sec     |
Retraction | 3.0 ± 0.5 sec     | |
Bucket     | Extension     | 2.2 ± 0.4 sec     |
Retraction | 2.9 ± 0.3 sec     | |
Blade     | Extension     | 1.1 ± 0.2 sec     |
Retraction | 1.1 ± 0.2 sec     | |
Boom Swing     | Extension     | 6.7 ± 1.4 sec     |
Retraction | 5.8 ± 1.4 sec     |
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