COMPRESSOR TROUBLESHOOTING CHART

COMPRESSOR TROUBLESHOOTING CHART (cont) - TM-5-3805-260-24_104

TM-5-3805-260-24 Scraper Tractor: Elevating Self-Propelled 11 Cubic Yard Sectionalized and Nonsectionalized Manual
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TM 5-3805-260-2428. 28. ALTERNATOR HAS NOISE Cause Correction Drive Belt For Alternator is Install a new drive belt for the alternator. Worn or Has A Defect Loose Alternator Drive Check key groove in pulley for wear. If groove is worn, install a Pulley new pulley. Tighten pulley nut according to Specifications. Drive Belt and Drive Pulley Make an adjustment to put drive belt and drive pulley in correct For Alternator Are Not in alignment. Alignment Worn Alternator Bearings Install new bearings in the alternator. 29. EXHAUST TEMPERTATURE IS TOO HIGH Cause Correction Air Inlet or Exhaust System Remove restriction. Has A Restriction Wrong Fuel Injection Timing Make an adjustment to the timing. COMPRESSOR TROUBLESHOOTING CHART SYMPTOMS CAUSE REMEDY 30. Compressor passes excessive A. Restricted air intake. A. Check engine air cleaner and replace if neces- oil as evidenced by presence sary. Check compressor air inlet line for kinks, of oil at exhaust ports of excessive bends and be certain inlet lines have valving or seeping from air the minimum specified inside diameter. strainer. Recommended minimum inlet line inside diameter is 5/8". Recommended maximum air inlet restriction is 25" of water. B. Restricted oil return B. Oil return to the engine should not be in (to engine). any way restricted. Check for excessive bends, kinks, and restrictions in the oil return line. Minimum recommended oil return line size is 5/8" O.D. tubing or equivalent I.D. (1/2" minimum). Return line must CONSTANTLY DESCEND from the compressor to the engine crankcase. Make certain oil drain passages in the compressor and mating engine surfaces are unobstructed and aligned. Special care must be taken when sealants are used with, or instead of, gaskets. 2-34

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