HOUSING 8N2494 - Caterpillar

Table 1
Required Tools
Description Qty
Measuring Tape 1
Stopwatch 1
Illustration 1 g00297618
Position the machine on level ground. Refer to Illustration 1.
Stop the engine.
Illustration 2 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 2.
The bucket should be empty.
Move the swing joystick in either direction until the machine completes a 180 degree swing operation away from the target.
Move the swing joystick in either direction until the machine completes a 180 degree swing operation toward the target. Return the swing joystick 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 2. Note: Use a point that is visible from the operator seat as a reference point for the target.
Table 2
Overswing
Item New Rebuild Service Limit
Right Swing 1100 mm (43.3 inch) or less 1200 mm (47.2 inch) or less 1400 mm (55.1 inch) or less
Left Swing
Move the swing joystick in each direction and measure the time that is required to complete a 180 degree swing operation.
Table 3
Swing Time
Item New Rebuild Service Limit
Right Swing 5.1 seconds or less 5.5 seconds or less 6.1 seconds or less
Left Swing