TM 5-3895-383-24Testing and Adjusting SectionTroubleshootingMachine Preparation for TroubleshootingSMCS Code: 6606-035Refer to the following warnings for all inspections and tests ofthe vibratory system. If the source of the problem is notdetermined, perform the inspections and tests. Perform theinspections and tests in sequential order. For all tests, thevibratory system oil must be at normal operating temperature.Sudden movement of the machine or release of oil underpressure can cause injury to persons on or near themachine.To prevent possible injury, perform the procedure thatfollows before testing and adjusting the vibratory system.Personal injury can result from hydraulic oil pressure andhot oil.Hydraulic oil pressure can remain in the hydraulic systemafter the engine has been stopped. Serious injury can becaused if this pressure is not released before any serviceis done on the hydraulic system.Make sure all of the attachments have been lowered, oil iscool before removing any components or lines. Removethe oil filler cap only when the engine is stopped, and thefiller cap is cool enough to touch with your bare hand.NOTICECare must be taken to ensure that fluids are containedduring performance of inspection, maintenance, testing,adjusting and repair of the product. Be prepared to collectthe fluid with suitable containers before opening anycompartment or disassembling any component containingfluids.Refer to Special Publication, NENG2500, "Caterpillar Toolsand Shop Products Guide" for tools and supplies suitableto collect and contain fluids on Caterpillar products.Dispose of all fluids according to local regulations andmandates.1.Release the pressure in the hydraulic system (page 11-41).During a diagnosis of the hydraulic system, remember thatcorrect oil flow and pressure are necessary for correctoperation. The output of the pump (oil flow) increases with anincrease in engine speed (rpm) and decreases when enginespeed (rpm) is decreased. Oil pressure is caused byresistance to the flow of oil.The 4C-4892 ORFS Fittings Group can be used to makepressure tests on the vibratory system. Before any tests aremade, visually inspect the complete hydraulic system forleakage of oil and for parts that are damaged. For some of thetests, a magnet and a measuring rule are usable tools.When any test is made of the vibratory system, the hydraulicoil must be at the normal temperature for operation.Troubleshooting can be complex. A list of some of thepossible problems and corrections are on the following pages.11-40
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