TM-9-2520-234-35 Technical Manual for M109 Transmission XTG-411-2A Download
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PAR 63-65 CHAPTER 4 TROUBLESHOOTING Section I. GENERAL 63. PURPOSE Note: Information in this chapter is for use by Ordnance mainte- nance personnel, in conjunction with and as a supplement to the troubleshooting section in the ap- plicable TM-20 manual. It provides continuation of instructions where a remedy in the Unit level mainte- nance manual refers to Ordnance maintenance personnel for cor- rective action. Operation of a deadlined vehicle without a preliminary examination can cause fur- ther damage to a disabled component and possible injury to personnel. By careful inspection and troubleshooting, such dam- age and injury can be avoided. In addition, the causes of faulty operation of a vehicle or component can often be determined without extensive disassembly. 64. GENERAL INSTRUCTIONS AND PROCEDURES Note: This chapter contains inspection and troubleshooting procedures to be performed while a disabled component is still mounted in the vehicle as well as after it has been removed. a. The inspections made while the component is mounted in the vehicle are, for the most part, visual and are to be performed before attempting to operate the vehicle. The object of these inspec- tions is to determine the condition of these components and, if found defective, to take precautions to prevent any further damage. b. The troubleshooting performed while the component is mounted in the vehicle is that which is beyond the scope of the using organization. Check the troubleshooting section of the applicable TM-20 manual, then proceed as outlined in this chapter. c. If the component alone is received by the Ordnance establishment, inspection is performed to verify the diagnosis made when the component was in the vehicle, to uncover further defects, or to determine malfunctions. This inspection is particu- larly important because it is often the only means of determining the malfunction without completely disassembling the component. Section II. TROUBLESHOOTING PROCEDURES 65. OPERATING CHARACTERISTICS a. Construction Features. Refer to pars. 8 through 27 for description and To perform effective troubleshoot- operation of transmission components. ing, the mechanic must have a thorough knowledge of the construction features b. Functions of Components. Refer and operating characteristics of the to pars. 28 through 58 for explanations of power train. Particular attention should power train hydraulic operations and be accorded to the subjects outlined power flow through the power train com- below. ponents. Change 2 69