Rato R80, Руководство по обслуживанию, Страница: 32 / 79

Part IV Disassembly and Maintenance
28
4-1-3 Unstable speed
Phenomenon Cause Remedy
There is knocking
noise in the gasoline
engine
Excessive wear of piston, cylinder and piston
ring
Replace worn parts
Excessive wear of piston pin and pin hole Replace the piston or piston pin
Excessive wear of small end of connecting
rod
Replace the connecting rod
Wearing of rolling bearing of crankshaft
crank journal
Replace the bearing
Deflagration
Gasoline engine overheating Find the cause and eliminate the fault
There is carbon deposit in the combustion
chamber.
Clear carbon deposit
Unqualified gasoline Replace with qualified gasoline
Misfire of gasoline
engine
There is water in float chamber Clean the float chamber
Electrode clearance of spark plug is
improper
Adjust electrode clearance
Ignition coil failure, etc. Check and replace damaged parts
4-1-4 Starter motor's failure to start
Inspection item Possible causes Remedy
1. Check the battery
connection.
Incorrect connection Carry out connection correctly
2. Check the battery.
Gasoline engine’s failure to charge the
battery or insufficient battery charging;
battery plate vulcanization and corrosion
because the battery is not used for a long
time.
Check or replace the rectifier bridge
circuit, and then use a special charger
for charging fully; replace the battery.
3. Abnormal operation
of starter motor
Fault of starter motor or starting relay,
looseness or shedding of wires, fault of
starting switch.
Check to eliminate the circuit fault of
the starter or replace the faulty parts.