2. Troubleshootimf 2. TROUBLESHOOTING 2.1 Quick Reference Table for Troubleshooting The following table summarizes the general trouble symptoms and their causes. If any trouble symptom occurs, take corrective action before it develops into a serious problem so as not to shorten the engine service life. Starting failure insufficient Poorex- g engine output haust color -z Trouble symptom 2 Exhaust smoke 0 z Corrective action P Cause 8 8 g .rn I? Compression leakage from valve seat 0 0 0 0 0 0 0 0 Lap the valve seat. (See 4.2(6) in Chapter 4.) Improper clearance of intake/exhaust valve 00 0 0 0 0 Adjust the valve clearance.
(See 3.5 in Chapter 3.) Seizure of intake/exhaust valve 0 00 0 0 0 00 0 0 0 Correct or replace. Blowout from cylinder head gasket 0 0 0 Replace the gasket. (See 4.2(2) - @h Chapter 4.) Seized or broken piston ring 0 0 0 0 0 0 0 00 00 0 Replace the piston ring. (See 4.4(2) - 0, @ in Chapter 4.) Worn piston ring, piston or cylinder 0 0 0 0 00 0 See 4.4(5)-(5.1). (5.4) and Perform honing and use oversize parts. in chapter 4. (6) Seized crankpin metal or bearfng 00 0 000 0 Repair or replace. Improper arrangement of piston ring joints 0 0 0 0 Correct the ring joint positions. (See 4.4 (4)-6 in Chapter 4.) E Reverse assembly of piston rings 0 0 0 0 Reassemble 4.4 in correctly.
(See (4)-6 Chapter 4.) g Worn crankpin and bearing journal 0 0 000 0 Measure and replace. (See 4.4 (5)-(5.2) - @ in Chapter 4.) 6 E Loosened connecting rod bolt 0 0 0 Tighten to the specified torque. (See 4.4 (4)-2 in Chapter 4.) z Foreign matter trapped in combustion chamber 0 0 0 0 Disassemble and repair. Worn intake/exhaust valve guide 0 0 0 Measure and replace. (See 4.2 (5)-(5.2) and (7) in Chapter 4.) Excessive gear backlash 0 Adjust gear meshing. (See 4.3 (4)-2 in Chapter 4.) Defective governor 0 0000 Make adjustment. (See 3.8 in Chapter 3.) Improper open/close timing of intake/ 0 0000 0 Adjust the valve clearance.
(See 3.5 in Chapter 3.) exhaust valves $j Waste gate malfunction Fouled blower 0 0 0 0 Wash the blower. Disassemble and inspect. g Worn floating bearing 0 0 Disassemble and inspect. :: P 3 2-l