RING 9U8147 - Caterpillar

Specification
Table 1
Swing Speed    
Item    Specification    
308E
Right Swing     4.0 sec or less    
Left Swing    
Table 2
Swing Drift (1)    
Bucket Load
(kg)     Time
(min)     Swing Drift
(mm)
(inch)    
520.0     3.0     0    
( 1 ) Maximum DriftIntroduction
Measuring the swing speed on a slope will determine if there is a need to check the swing motor. Measuring the swing drift on a slope will determine if there is a need to check the swing parking brake.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 3
Required Tools    
Description    Qty    
Tape Measure     1    
Stopwatch     1    Test Procedure
Swing Speed on a Slope
Illustration 1 g03332341
(A) 12 degrees
Complete the following steps in order to measure the swing speed on a slope.
Start the engine.
Place the engine speed dial in the HIGH IDLE position.
Increase the hydraulic oil temperature to 55° 5°C (131° 9°F).
Position the machine on a slope of 12 degrees. Refer to Illustration 1.
Position the implements at maximum reach and close the bucket. Position the bucket above the ground so that the bucket will not come in contact with any obstacles.
Illustration 2 g03555942
Position the upper structure at position (X). The upper structure should be at a 90 degree angle to the lower structure. Refer to Illustration 2.
Measure the time that is required to swing the upper structure from position (X) to position (Y) .
Position the upper structure at position (Z). 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 (Z) to position (Y) .Swing Drift on a Slope
Complete the following steps in order to measure the swing drift on a slope.
Illustration 3 g03555942
Load the bucket.Weight of bucket load with 308E excavators: ... 520 kg (1146 lb)
Position the upper structure at position (X). The upper structure should be at a 90 degree angle to the lower structure. Refer to Illustration 3.
Illustration 4 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 4.
Start the engine. Position the implements at maximum reach. Place the engine at the LOW IDLE position. Place the hydraulic activation lever in the UNLOCKED position.
Leave the machine in this position for 3 minutes. Measure the swing drift on the circumference of the swing bearing.
Position the upper structure at position (Z). The upper structure should be at a 90 degree angle to the lower structure. Refer