Specifications are listed in tables for the following operational checks. These specifications are calculated average values. The values will vary due to the configuration of the machine.
A machine with the following equipment was used to achieve these specifications:
Required Tools | ||
---|---|---|
Part Number | Description | Qty |
6V-3121 | Multitach group | 1 |
Engine speed for an excavator with no load at high idle is 1880 ± 50 rpm.
Item | 311B Specifications | |||
---|---|---|---|---|
New | Rebuild | Service Limit | ||
No load high idle(1) | 1880 ± 50 rpm(2) | 1680 to 1930 rpm(2) | ||
1980 ± 50 rpm(3) | 1780 to 2030 rpm(3) | |||
No load low idle | 850 ± 50 rpm | 850 ± 100 rpm | ||
Maximum speed with load(4) | 1730 rpm(5) | 1680 rpm(5) | 1630 rpm(5) | |
No load speed(6) | 1300 ± 80 rpm | 1300 ± 100 rpm |
(1) | AEC switch in the OFF position |
(2) | Three seconds after the engine speed dial was placed at position "10" |
(3) | Engine rpm within three seconds after the engine speed dial was placed at position "10" |
(4) | Pressure is relieved from both pumps. |
(5) | Minimum rpm |
(6) | AEC switch in the ON position |
Note: A New specification is the performance that can be expected for a new machine. A Rebuild specification is the performance that can be expected after rebuilding the components of a system. Performance beyond the Service Limit is an indication of the following problems: improper maintenance or adjustment, component wear and failure.
Preparation For Operational Checks
Perform Steps 1 through 3 prior to performing any of the following operational checks.
- Place the machine controls at the following settings: Power Mode, Boom Priority Mode, Engine speed dial "10" and AEC switch OFF.
- Increase the hydraulic oil temperature to
55° ± 5°C (131° ± 9°F) . - Set the relief valve pressure settings to the proper specification.
Note: Refer to Testing and Adjusting, "Pressure Specifications".
Required Tools | ||
---|---|---|
Part Number | Description | Qty |
5P-3277 | Measuring Tape | 1 |
Stopwatch | 1 |
Illustration 1 | g00296317 |
(A) Preliminary run (B) Travel distance (C) Bucket height |
- 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. - Position the machine so that one track is parallel with the reference line. Position the machine for the travel test. Refer to Illustration 1.
- The bucket should be empty.
Reference: Make reference to "Preparation For Operational Checks".
- 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 2 through 4.
Travel Time (time in seconds) | ||||
---|---|---|---|---|
Travel Speed | New | Rebuild | Service Limit | |
HIGH | Forward | 14.0 or less | 16.1 or less | 18.2 or less |
Reverse | ||||
LOW | Forward | 20.3 or less | 23.3 or less | 26.4 or less |
Reverse |
Note: The following table represents the travel deviation (distance) from the reference line.
Travel Deviation
mm (inch) |
||||
---|---|---|---|---|
Travel Speed | New | Rebuild | Service Limit | |
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 |
Travel Test On Level Ground (Optional Test)
Note: When "Travel Test On Level Ground" cannot be performed, this test may be used as a substitute.
Required Tools | ||
---|---|---|
Part Number | Description | Qty |
Stopwatch | 1 |
Illustration 2 | g00297292 |
- Position the machine on level ground.
- Raise a track off the ground. Refer to Illustration 2.
- Put a mark on a shoe of the raised track.
Reference: Make reference to "Preparation For Operational Checks".
- Place the travel speed control switch in HIGH position.
- Move the control lever of the raised track to full travel position.
- Measure the time that is required for the raised track to make three complete revolutions. Measure the time that is required in each direction.
- Place the travel speed control switch in the LOW position and repeat Steps 2 through 3.
311B Specifications (time in seconds) | ||||
---|---|---|---|---|
Travel Speed | New | Rebuild | Service Limit | |
HIGH | Forward | 14.4 or less | 16.6 or less | 18.7 or less |
Reverse | ||||
LOW | Forward | 20.9 or less | 24.0 or less | 27.2 or less |
Reverse |
Note: Measuring the amount of drift of the machine on a slope will determine if there is a need to check the travel brake.
Required Tools | ||
---|---|---|
Part Number | Description | Qty |
Stopwatch | 1 | |
Scale |
1 |
Illustration 3 | g00297342 |
- Place the machine on a slope of 12 degrees. The surface of the slope must be hard and smooth.
- Position the implements, as shown. Refer to Illustration 3.
- The bucket should be empty.
Illustration 4 | g00297498 |
- To indicate the machine's relative position to the slope, put a mark on both the track and the ground. Refer to Illustration 4.
- Stop the engine.
- Measure the machine movement on the slope after three minutes.
Drift mm (inch) | ||
---|---|---|
New | Rebuild | Service Limit |
0 | 0 | 0 |
Swing Speed And Overswing (On Level Ground)
Note: Measuring the swing speed and the overswing of the machine will determine if there is a need to check the swing motor or the anti-reaction valve. The fine swing control switch (if equipped) must be in the OFF position.
Required Tools | ||
---|---|---|
Part Number | Description | Qty |
5P-3277 | Measuring Tape | 1 |
Stopwatch | 1 |
Illustration 5 | g00297618 |
- Position the machine on level ground. Refer to Illustration 5.
- Stop the engine.
Show/hide table
Illustration 6 g00293972 (A) Upper frame
(B) Undercarriage frame
(C) Marking - To indicate the relationship of the two positions, put a mark (C) on the inner race and the outer race of the swing bearing. The mark will be used as a target to stop the swing operation. Refer to Illustration 6.
- The bucket should be empty.
Reference: Make reference to "Preparation For Operational Checks".
- Move the swing control lever in either direction until the machine completes a 180 degree swing operation away from the target.
- Move the swing control lever in either direction until the machine completes a 180 degree swing operation toward the target. Return the swing control lever to the NEUTRAL position at the target.
- Measure the amount of overswing by measuring the distance between the marks on the swing bearing. Refer to Illustration 6.
Note: Use a point that is visible from the operator seat as a reference point for the target.
Specification for Overswing | |||
---|---|---|---|
Item | New | Rebuild | Service Limit |
Right Swing | |
|
|
Left Swing |
- Move the swing control lever in each direction and measure the time that is required to complete a 180 degree swing operation.
Swing Time | |||
---|---|---|---|
Item | New | Rebuild | Service Limit |
Right Swing | 4.2 seconds or less | 4.8 seconds or less | 5.5 seconds or less |
Left Swing |
Swing Speed And Swing Drift (On A Slope)
Note: Measuring the swing speed on a slope will determine if there is a need to check the swing motor and the anti-reaction valve. Measuring the swing drift on a slope will determine if there is a need to check the swing parking brake.
Required Tools | ||
---|---|---|
Part Number | Description | Qty |
5P-3277 | Measuring Tape | 1 |
Stopwatch | 1 |
Illustration 7 | g00298078 |
- The bucket should be empty.
- Position the machine on a slope of 12 degrees. Refer to Illustration 7.
- Position the implements at maximum reach. Position the bucket above the ground so that the bucket will not come in contact with any obstacles.
Illustration 8 | g00298079 |
- Position the upper structure at position (A). The upper structure should be at a 90 degree angle to the lower structure. Refer to Illustration 8.
- Measure the time that is required to swing the upper structure from position (A) to position (B).
- Position the upper structure at position (C). The upper structure should be at a 90 degree angle to the lower structure.
- Measure the time that is required to swing the upper structure from position (C) to position (B).
Swing Time (seconds) | |||
---|---|---|---|
Item | New | Rebuild | Service Limit |
Right Swing | 3.7 or less | 4.3 or less | 4.8 or less |
Left Swing |
Illustration 9 | g00298079 |
- Position the upper structure at position (A). The upper structure should be at a 90 degree angle to the lower structure. Refer to Illustration 9.
Show/hide table
Illustration 10 g00293972 (A) Upper frame
(B) Undercarriage frame
(C) Marking - To indicate the relationship of the two positions, put a mark (C) on the inner race and the outer race of the swing bearing. Refer to Illustration 10.
- Stop the engine.
- Leave the machine in this position for three minutes. Measure the swing drift on the circumference of the swing bearing.
- Position the upper structure at position (C). The upper structure should be at a 90 degree angle to the lower structure. Refer to Illustration 9.
- Repeat Steps 3 and 4.
Swing Drift mm (inch) | |||
---|---|---|---|
Item | New | Rebuild | Service Limit |
Right Swing | 0 | 0 | 0 |
Left Swing |
Required Tools | ||
---|---|---|
Part Number | Description | Qty |
5P-3277 | Measuring Tape | 1 |
Stopwatch | 1 |
Illustration 11 | g00298378 |
Reference: Make reference to "Preparation For Operational Checks".
- Position the machine on level ground. Refer to Illustration 11.
- The bucket should be empty.
Test (Boom And Stick Cylinders)
- Raise the boom until the upper surface of the boom is parallel to the ground.
- Fully extend the bucket cylinder.
- Fully retract the stick cylinder.
- Measure each cylinder's length from cylinder pin to cylinder pin.
- Stop the engine.
- Leave the machine in this position for three minutes. Measure each cylinder's length from cylinder pin to cylinder pin for drift.
Illustration 12 | g00298379 |
- Raise the boom high enough so that the stick can be positioned perpendicular to the ground. Refer to Illustration 12.
- Fully extend the bucket cylinder.
- Measure the bucket cylinder's length from cylinder pin to cylinder pin.
- Stop the engine.
- Leave the machine in this position for five minutes. Measure the bucket cylinder's length from cylinder pin to cylinder pin for cylinder drift.
Cylinder Drift | |||
---|---|---|---|
Item | New | Rebuild | Service Limit |
Boom Cylinder | |
|
|
Stick Cylinder | |
|
|
Bucket Cylinder | |
|
|
Blade Cylinder | |
|
|
Required Tools | ||
---|---|---|
Part Number | Description | Qty |
Stopwatch | 1 |
Reference: Make reference to "Preparation For Operational Checks".
- Place the machine on level ground.
- The bucket should be empty.
- Fully retract the bucket cylinder and the stick cylinders.
Start with the bucket on the ground. Measure the time that is required for the boom cylinders to reach full extension.
Illustration 13 | g00298498 |
( A) Extension test
( B) Retraction test |
Start with the boom cylinders at full extension. Measure the time that is required for the bucket to come in contact with the ground.
- Position the upper surface of the boom parallel to the ground.
- Fully extend the bucket cylinder.
Start with the stick cylinder in the full retracted position. Measure the time that is required for full extension of the stick cylinder.
Illustration 14 | g00298558 |
(A) Extension test
( B) Retraction test |
Start with the stick cylinder in the full extended position. Measure the time that is required to retract the stick cylinder.
- Position the upper surface of the boom parallel to the ground.
- Position the stick in a perpendicular position to the ground.
Start with the bucket cylinder in the full retracted position. Measure the time that is required for full extension of the bucket cylinder.
Illustration 15 | g00298598 |
(A) Extension test
(B) Retraction test |
Start with the bucket cylinder in the full extended position. Measure the time that is required to retract the bucket cylinder.
Cylinder Operating Speed (seconds) | ||||
---|---|---|---|---|
Item | New | Rebuild | Service Limit | |
Boom | Extension | 3.3 ± 0.5 | 4.3 max. | 5.0 max. |
Retraction | 2.8 ± 0.5 | 3.6 max. | 4.2 max. | |
Stick | Extension | 2.8 ± 0.5 | 3.6 max. | 4.2 max. |
Retraction | 2.7 ± 0.5 | 3.5 max. | 4.1 max. | |
Bucket | Extension | 4.3 ± 0.5 | 5.6 max. | 6.5 max. |
Retraction | 2.7 ± 0.5 | 3.5 max. | 4.1 max. | |
Blade | Extension | 1.9 ± 0.3 | 2.5 max. | 2.9 max. |
Retraction | 1.9 ± 0.3 | 2.5 max. | 2.9 max. |