COVER 1400076 - Caterpillar

Table 1
914G and 914G2 Wheel Loader Cycle Times    
Machine Function     Time in Seconds    
Lift with empty bucket (1)     5.2 0.7    
Dump with empty bucket (2)     2.0 0.4    
( 1 ) The work tool is in the full TILT position.
( 2 ) The lift arms are in the full RAISE position.
Table 2
IT14G and IT14G2 Integrated Toolcarrier Cycle Times    
Machine Function     Time in Seconds    
Lift with empty bucket (1)     6.1 0.7    
Dump with empty bucket (2)     3.0 0.4    
( 1 ) The work tool is in the full TILT position.
( 2 ) The lift arms are in the full RAISE position.The speed of the implements is affected by the amount of oil flow that is produced by the implement pump. Check the implement cycle times in order to determine if there may be a problem with the implement pump.
Perform the machine preparation for testing.ReferenceFor more information about preparing the machine for troubleshooting, refer to the Service Manual module Testing and Adjusting, "Machine Preparation for Troubleshooting" for the machine that is being serviced.
Illustration 1 g00934339
Warm the hydraulic oil to normal operating temperature. Normal operating temperature that is needed in order to run the cycle time test is between 38 °C (100 °F) and 65 °C (150 °F). If Caterpillar Electronic Technician is being used, the hydraulic oil temperature can be monitored on the screen. Refer to Illustration 1, for the location on the screen for the hydraulic oil temperature.
Place the ride control switch in the OFF position.
Begin the test for the lift cycle time with the work tool in the full TILT position.
Increase the engine speed to high idle.
Pull the lift control lever back to the full RAISE position. Measure the cycle time from the work tool flat on the ground to the full RAISE position. Record the lift cycle time.
Ensure that the lift linkage in the full RAISE position and the work tool is in the full TILT position.
Move the tilt control lever to the full DUMP position. Measure the time for the work tool to travel from the full TILT position to the full DUMP position. Record the cycle time for dump.
Reduce engine speed to low idle.
Lower the work tool to the ground.
Turn the engine start switch to the OFF position.Compare the test results with the cycle times that are listed in Table 1 for the 914G and 914G2 Wheel Loader. Compare the test results with the cycle times that are listed in Table 2 for the IT14G and IT14G2 Integrated Toolcarrier. The implement pump should be working properly if the implement cycle times match the cycle times that are listed in Tables.If, the cycle times are not correct for both the lift and tilt functions one of the following conditions are probably present:
The pump may have excessive wear.If, the cycle time is slow for only one of the implement circuits, see the following conditions. The circuit with slow