ROTOR-EXCITER 5264954 - Caterpillar

Table 1
Required Tools
Description Qty
Measuring Tape 1
Stopwatch 1
Illustration 1 g00298078
Complete the following steps in order to measure the swing speed on a slope.
The bucket should be empty.
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 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 2.
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).
Table 2
Swing Time (seconds)
Item New Rebuild Service Limit
Right Swing 4.6 or less 4.9 or less 5.6 or less
Left Swing
Complete the following steps in order to measure the swing drift on a slope.
Load the bucket. Weight of bucket load 312D ... 675 kg (1490 lb)
Illustration 3 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 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.
Stop the engine.
Leave the machine in this position for three minutes. Measure the swing drift on the circumference of the swing bearing.
Start the engine.
Position the upper structure at position (C). The upper structure should be at a 90 degree angle to the lower structure. Refer to Illustration 3.
Repeat Steps 2.c through 2.e.
Table 3
Swing Drift mm (inch)
Item New Rebuild Service Limit
Right Swing 0 0 0
Left Swing