20 TESTING, ADJUSTING AND TROUBLESHOOTING20-1 7 12 Table of judgement standard value .... 20-25Testing and adjusting hydraulic pressure in work equipment, swing, travel circuit.... 20-35
Trang 9720 TESTING, ADJUSTING AND TROUBLESHOOTING
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Table of judgement standard value 20-2Standard value table for electrical system 20-18Tool for testing, adjusting, and troubleshooting 20-20Adjusting valve clearance 20-21Measuring compression pressure 20-23Adjusting fuel injection timing 20-24Measuring engine oil pressure 20-24-1Adjusting fuel control lever 20-25Testing and adjusting hydraulic pressure in work equipment, swing, travel circuit 20-26Testing control circuit pressure 20-29Measuring output pressure of PPC valve 20-30Adjusting PPC valve 20-31Measuring solenoid valve outlet port pressure 20-32Adjusting blade control lever 20-33Measuring internal leakage of cylinder 20-34Bleeding air from hydraulic circuit 20-35Releasing remaining pressure from hydraulic circuit 20-37Testing hydraulic breaker gas pressure 20-38Troubleshooting 20-39
★ The following precautions are necessary when using the standard value tables for testing and adjusting or for shooting
trouble-1 The values in the tables are for new machines and are obtained from reference to values when the machine is shipped fromthe factory These values should be used only as a target guide for judging the progress of wear or when repairing the ma-chine
2 The standard values for judging failures are based on the results of various tests when shipping the machine from the tory These values should be used as reference together with the repair condition and operating record of the machine tomake judgement on failures
fac-3 These standard values do not form a basis for judging claims
WARNING! Before performing inspection, adjustment or faultfinding, park the machine on level ground and check the safety pin and chock.
WARNING! When performing joint work, make appropriate signals and allow only authorized personnel near the machine.
WARNING! When checking the water level, allow the engine to cool down before removing the radiator cap to prevent the risk of being scalded by hot water which may spurt out if engine is hot.
WARNING! Take great care to avoid getting caught in rotating parts such as the fan, etc.
PC25-1 PC30-7 PC40-7 PC45-1