Engine Does Not Rotate Smoothly - Komatsu 114E-3 Series Shop Manual

SEN00458-01
S-5 Engine does not rotate smoothly
General causes why engine does not rotate smoothly
Air in fuel system
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Defective speed sensor (Error at degree that it is not indicated)
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Confirm recent repair history
Degree of use of machine Operated for long period
Condition of hunting
Replacement of filters has not been carried out according to Operation and Maintenance
Manual
When fuel tank is inspected, it is found to be empty
Air breather hole of fuel tank cap is clogged
Rust and water are found when fuel tank is drained
Fuel is leaking from fuel piping
Inspect fuel filter, strainer directly
When a cylinder is cut out for reduced cylinder mode operation, engine speed does not
change
Carry out troubleshooting according to "Abnormality in Ne speed sensor (*1)" in E-mode
Carry out troubleshooting according to "Abnormality in Bkup speed sensor (*2)" in E-mode
*1: Code [689/CA689] in E-mode
*2: Code [778/CA778] in E-mode
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Occurs at a certain speed range
Occurs at low idle
Occurs even when speed is raised
Occurs on slopes
40 Troubleshooting
Causes
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Remedy
114E-3 Series
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