Yanmar 3TNV82A Service Manual page 359

Troubleshooting Charts
Trouble Symptom Starting Problem
Cause
Reverse Assembly of Piston Rings
Worn Crankpin and Journal Bearing
Loose Connecting Rod Bolt
Foreign Matter Trapped in Combustion
O
Chamber
Excessive Gear Backlash
Worn Intake / Exhaust Valve Guide
Governor Adjusted Incorrectly
Improper Open / Close Timing of Intake /
O
Exhaust Valves
TNV DI Service Manual
Poor
Insufficient
Exhaust
Engine Output
Color
Engine Starts
During
But Stops Exhaust Color
Work
Soon.
Exhaust
Smoke
O O
O O
O
O
O
O
O
O O O O O
Engine Engine
Engine Oil
Surging Coolant
O O
O O O O
O O
O O
O O
O O O O
Air Intake
Corrective Action
Reassemble Correctly.
Measure and Replace.
Tighten to the Specified Torque.
Disassemble and Repair.
Adjust Gear Meshing.
Measure and Replace.
Make Adjustment.
Adjust the Valve Clearance.
TROUBLESHOOTING
Reference Page
See Reassembly of Pistons on
page 6-84.
See Inspection of Crankshaft on
page 6-81.
See Torque for Bolts and Nuts on
page 6-23.
See Disassembly of Engine on
page 6-67.
See Checking Timing Gear Backlash on
page 6-68.
See Inspection of Valve Guides on
page 6-38.
See Check and Adjust the Governor
Lever and Engine Speed Control on
page 5-28.
See Measuring and Adjusting Valve
Clearance on page 6-60.
14-9