Zontes ZT125T-D Maintenance Manual page 5

4. Remove the air filter housing ........................................................................................................................................ 42
5. Replace Air filter element ............................................................................................................................................. 43
6. Inspection air filter waste oil pipe ................................................................................................................................. 43
7. Reinstall ......................................................................................................................................................................... 43
Bolts and nuts of muffler .......................................................................................................................................................... 44
1. Check for air leaks at the engine exhaust. .................................................................................................................... 44
2. Check for nut and bolts at the muffler .......................................................................................................................... 44
D350 Spark plug ........................................................................................................................................................................ 45
1. Disassemble the spark plug ........................................................................................................................................... 45
D350 .......................................................................................................................................................................... 45
D125 .......................................................................................................................................................................... 46
2.Check the spark plug ...................................................................................................................................................... 47
D350 .......................................................................................................................................................................... 47
D125 .......................................................................................................................................................................... 47
3. Refer to the steps to remove the spark plug to restore all parts. ................................................................................. 47
Engine oil ................................................................................................................................................................................... 48
D350 .................................................................................................................................................................................. 48
1. Drain the oil ........................................................................................................................................................... 48
2. Replace fine filter .................................................................................................................................................. 48
3. Add oil ................................................................................................................................................................... 49
4. Change gear box oil ............................................................................................................................................... 49
5. Confirm the oil level .............................................................................................................................................. 49
M125 ................................................................................................................................................................................. 50
1. Drain the oil ........................................................................................................................................................... 50
2. Replace fine filter .................................................................................................................................................. 50
3. Add oil ................................................................................................................................................................... 50
4. Change gear box oil ............................................................................................................................................... 51
5. Confirm the oil level .............................................................................................................................................. 51
D350 Throttle valve body ....................................................................................................................................................... 51
1. Do not dismantle the throttle body to clean up carbon deposits ................................................................................. 51
2. Remove the stepper motor and clean up carbon deposits ........................................................................................... 51
3. Remove the throttle valve body assembly to clean up carbon deposits ...................................................................... 52
4. Disassemble the sensor ................................................................................................................................................. 53
5. Throttle valve body troubleshooting process ............................................................................................................... 54
M125 Throttle valve body ......................................................................................................................................................... 55
1. Do not dismantle the throttle body to clean up carbon deposits ................................................................................. 55
2. Remove the stepper motor and clean up carbon deposits ........................................................................................... 55
3. Remove the throttle valve body assembly to clean up carbon deposits ...................................................................... 56
4. Disassemble the sensor ................................................................................................................................................. 56
5. Throttle valve body troubleshooting process ............................................................................................................... 56
Throttle cable ............................................................................................................................................................................ 57
1. Inspection ...................................................................................................................................................................... 57
2. Adjust the throttle cable clearance ............................................................................................................................... 57
3. Lube door cable ............................................................................................................................................................. 57
Idle speed .................................................................................................................................................................................. 58
Check idle speed: .............................................................................................................................................................. 58
Fuel evaporative pollutant control system ............................................................................................................................... 59
D350 fuel evaporation ...................................................................................................................................................... 59
M125 fuel evaporation ..................................................................................................................................................... 60
Radiator..................................................................................................................................................................................... 61
1. Check the coolant.......................................................................................................................................................... 61
2. Add coolant (antifreeze) to the Coolant expansion tank .............................................................................................. 61
3.D350 Add coolant to the Radiator ................................................................................................................................. 61
4. Put coolant .................................................................................................................................................................... 62
D350 .......................................................................................................................................................................... 62
M125 ......................................................................................................................................................................... 62
5. Check whether the fins of the radiator water tank are deformed or the air duct is blocked ....................................... 62
D350 .......................................................................................................................................................................... 62
M125 ......................................................................................................................................................................... 63
6. Check all water pipes for leaks; aging. .......................................................................................................................... 63
D350 .......................................................................................................................................................................... 63
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