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Pruebas y Ajustes320B Excavator Hydraulic System
Swing Speed and Overswing on Level Ground - Check
SMCS - 5058-535-ZW
Measuring the swing speed and the overswing of the machine will determine if there is a need to checkthe swing motor or the anti-reaction valve. The fine swing control switch (if equipped) must be in theOFF position.
Note: The engine speed and/or the machine configuration that is used during this test can affect theresults of this test. Refer to Testing and Adjusting, "Operational Checks" for the engine speed and themachine configurations that were used for this test.
Note: The relief valve pressure settings must be set to the relief valve pressure specification beforeperforming this operational check. Refer to Testing and Adjusting, "Pressure Specifications".
Cerrar SIS
Pantalla anterior
Producto: EXCAVATORModelo: 320B EXCAVATOR 3YZ
Configuracin: 320B, 320B L,320B N, 320B S, 320B LN Excavators3YZ00001-UP (MACHINE) POWERED BY 3116 Engine
Nmero de medio -SENR9247-07 Fecha de publicacin -01/11/2004 Fecha de actualizacin -02/11/2004
i01674320
Table 1
Required Tools
Part Number Description Qty
5P-3277 Measuring Tape 1
Stopwatch 1
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1. Position the machine on level ground. Refer to Illustration 1.
2. Stop the engine.
Illustration 1 g00297618
Illustration 2 g00293972
(A) Upper frame
(B) Undercarriage frame
(C) Marking
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3. To indicate the relationship of the two positions, put a mark (C) on the inner race and the outerrace of the swing bearing. The mark will be used as a target to stop the swing operation. Refer toIllustration 2.
4. The bucket should be empty.
5. Move the swing control lever in either direction until the machine completes a 180 degree swing
operation away from the target.
6. Move the swing control lever in either direction until the machine completes a 180 degree swingoperation toward the target. Return the swing control lever to the NEUTRAL position at thetarget.
7. Measure the amount of overswing by measuring the distance between the marks on the swingbearing. Refer to Illustration 2.
Note: Use a point that is visible from the operator seat as a reference point for the target.
8. Move the swing control lever in each direction and measure the time that is required to complete a180 degree swing operation.
Table 2
Overswing
Item New Rebuild Service Limit
Right Swing
1100 mm (43.3 inch) orless
1200 mm (47.2 inch) orless
1400 mm (55.1 inch) orlessLeft Swing
Table 3
Swing Time
Item New Rebuild Service Limit
Right Swing4.2 seconds or less 4.6 seconds or less 5.2 seconds or less
Left Swing
Copyright 1993 - 2012 Caterpillar Inc.Todos los derechos reservados.Red privada para licenciados del SIS.
Wed Jan 4 10:02:22 UTC-0400 2012
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