Quick Reference Table For Troubleshooting - Takeuchi TB 175 Handbuch

3.2 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 becomes a serious problem so as not to shorten the engine service life.
Trouble symptom
Cause
Improper clearance of intake/exhaust valve
Compression leakage from valve seat
Seizure of intake/exhaust valve
Blowout from cylinder head gasket
Seized or broken piston ring
Worn piston ring, piston or cylinder
Seized crankpin metal or bearing
Improper arrangement of piston ring joints
Reverse assembly of piston rings
Worn crankpin and journal bearing
Loosened connecting rod bolt
Foreign matter trapped in combustion chamber
Excessive gear backlash
Worn intake/exhaust valve guide
Defective governor
Improper open/close timing of intake/exhaust valves
Fouled blower
Waste gate malfunction
Worn floating bearing
Poor
Insufficient
Starting failure exhaust
engine output
color
Engine starts
Exhaust During
but stops
color work
soon.
Exhaust
smoke
Cooling
Hunting Lubricating oil
water
54
3. TROUBLESHOOTING
Air
intake
Corrective action
Adjust the valve clearance. (See 2.2.6 (4) in Chapter2.)
Lap the valve seat. (See 4.2.6 in Chapter4.)
Correct or replace.
Replace the gasket. (See 4.2.2-12) in Chapter4.)
Replace the piston ring. (See 4.4.2-5) & 10) in Chapter4.)
Perform honing and use oversize parts.
(See 4.4.5-1)4) and 4.4.6 in Chapter4.)
Repair or replace.
Correct the ring joint positions. (See 4.4.4-point 6 in Chapter4.)
Reassemble correctly. (See 4.4.4-point 6 in Chapter4.)
Measure and replace. (See 4.4.5-(2) in Chapter4.)
Tighten to the specified torque. (See 4.4.4-point 2 in Chapter4.)
Disassemble and repair.
Adjust gear meshing. (See 4.3.4-point 2 in Chapter4.)
Measure and replace. (See 4.2.5-(2) and 4.2.7 in Chapter4.)
Make adjustment.
Adjust the valve clearance. (See 2.2.6-(4) in Chapter2.)
Wash the blower.
Disassemble and inspect.
Disassemble and inspect.