CONTROL VALVE 1704473 - Caterpillar

Specification
Table 1
Overswing
Item Specification
Right Swing 600 mm (23.6 inch) or less
Left Swing
Table 2
Swing Time(1)
Item Specification
Right Swing (90°) 3.0 sec or less
Left Swing (90°)
Continuous swing right (three revolutions)(2) 14.5 - 17.5 sec or less
Continuous swing left (three revolutions)(2)
(1) Empty bucket
(2) Start the measurement after the machine has rotated one full revolution.Introduction
Measuring the swing speed and the overswing of the machine will determine if there is a need to check the swing motor.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
Illustration 1 g03332315
Position the machine on level ground. Refer to Illustration 1.
Fully retract the stick cylinder and fully extend the bucket cylinder.
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.
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).
Load the bucket.Weight of bucket load for 308E2 excavators ... 375 kg (827 lb)
Move the swing joystick in either direction until the machine completes a 90 degree swing operation away from the target.
Move the swing joystick in the opposite direction until the machine completes a 90 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.
Empty the bucket and reposition the machine according to Illustration 1.
Move the swing joystick in each direction and measure the time that is required to complete a 90 degree swing operation.Move the swing joystick in each direction and measure the time that is required to complete three revolutions.