2.6 Tightening Torque of Main Bolts and Nuts:
Cylinder cover bolt
Main bearing bolt
Connecting rod bolt
Flywheel bolt
Crankshaft pulley bolt
Other bolts: mechanical property is 8.8 grade, tightening torque N.m
Japanese
bolt TT
Joint bolt
M10
1.25
98
M12
1.5
73
M9
43
M10
1.25
32
M14
1.5
30
M6
M8
M10
M12
M14
M16
M18
M20
M8
M10
M12
M14
M16
80
5
120
5
60
5
70
5
180
10
8~12
18~26
45~60
80~100
130~150
180~210
240~270
350~400
13~16
20~28
25~32
38~45
48~55
Item
Value
Remark
Tightening torque
(N.m)
Thread
specification
Note:
1. If the bolts screw into the aluminum alloy part, the tightening torque should be
about 80% of the small value at left column.
2. If the performance rate is 5.6 grade, the tightening torque should be about 60%
of the small value at left column.
2.7 Operation control system
2.7.1 Starting switch
th
Starting switch is a kind of 4 grade switch with heat and automatic reset function.
Insert the key into the switch hole and screw it, which enables the starting switch
to choose the position.
OFF If the key is staying at this position, it means that the engine is stopped, and
the key can be released or inserted since all the current is cut off at this position.
ON If Current goes through the meter and inspect instrument (alarm system) when
the key is on ON position.
START Turn the key to the START position and the starter motor will start the
engine. Release the key and it will be return to ON position automatically.
HEAT When the key is staying at this position, the current will go through the air
heater, and the inlet air of the cylinder is heated, resulting the rising of the
temperature. Release the key and it will return to OFF automatically.
2.7.2 Air-heater (cold starting aid device)
The air-heater is installed in the flange of the inlet pipe to provide an easy starting
of the engine, and its working principle goes as following: If the engine is started in
a low temperature, switch the current on the air-heater, and the electrical heated
platen becomes heater and heater, resulting in the heat of the inlet air.
Turn the key to HEAT position, and the current will go through the air-heater,
meanwhile, the heat indicating lamp is on, indicating the beginning of heating. The
lamp will go off in about 15 seconds, indicating the finish of heating.
Turn the key clockwise quickly to the START position immediately after the lamp
is off, and the pinion of electrical starter will jump out to joggle with the ring gear of
flywheel, thus the engine is started.
2.7.3 STOPPING-ENGINE DEVICE
If the key is turned to OFF during normal running of the engine, the fuel shut-off
electromagnet on the fuel injection pump will actuate to cut off the fuel supply of the
fuel injection pump, and thus the fuel injection is stopped, resulting a quick stop of
the engine.
2.7.4 Speeder: Mechanical centrifugal speeder /all speed governor
Control the engine speed via the speed control lever: Move the control lever
upward to raise the speed, or downward to decrease it.
If there is a necessary to operate the speed control lever in a remote place, a
remote control device can be attached, and the lever can be controlled by a micro
motor.
Never loose the high speed or low speed limit switch because the steady speed
of the engine at its maximum and minimum state has been strictly restricted.
2.7.5 Alarm lamp
These lamps are used to monitor abnormal states during the engine running.
2.7.5.1 CHARGE ALARM LAMP
The light will be on when turn on the starting switch, it will be off when the engine is
running properly, which means the light is off when battery is charging normally; if
not, the battery might be abnormal, and at this moment, please check the cause of
the abnormal charging of the engine.
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