lever, and it take two flexible shaft to
implement the gear selecting and
shifting which is shown in the figure
on the next page. It is composed of
operating lever seat尧flexible shaft for
gear selecting or shifting and the
bracket. The core shaft of the interior
flexible shaft is steel cable, the oper鄄
ation of gear selecting or shifting is
completed by the pushing or pulling
motion of the steel cable. The ball on
the flexible shaft and adjusting screw
are used for adjusting the total length
of the flexible shaft to ensure that the
gear selecting or shifting can be to
the correct position. There are sym鄄
bols of each gear on the control
handle of the transmission, it is
shown in the below figure.
Using and maintenance
1. If find the gear shifting can not
operate or operate difficultly when
the engine is not working, it shows
that the gear shifting lever (or the
flexible shaft) have bad adjustment
or the bolt becomes loose, now you
must adjust the control lever (or the
flexible shaft), check and tighten ev鄄
ery bolt and every nut.
1尧 gear shift control lever 2尧dust cover
3尧handle 4尧floor of the cab
5尧flexible
shaft for gear selecting
6尧transmission rocker arm for gear select鄄
ing 7尧side bracket for gear selecting 8尧
flexible shaft for gear shifting
9尧fixed
bracket of the gear shifting flexible shaft
10尧rear cover of the clutch 11尧transmis鄄
sion rocker arm for gear shifting
control handle of transmission
schematic diagram of the
transmission gear shift control device
32
HFC1020
series trucks
2. If find out-of-gear when running
on the rough road, the control lever
(or the flexible shaft) have bad ad鄄
justment, and it should be adjusted
correctly.
3. If is find free play of the control
lever too large, check and tighten
every bolt and every nut.
4. Do not take gear shifting operation
when the engine work at over fast
speed to avoid accelerating the wear
of the synchronizer.
5. When shifting, the force should be
gentle. The hand force must be act鄄
ed on the control lever until the gear
reaches the correct position. Shifting
with flap of one push and one loosen
is inappropriate and the shifting op鄄
eration can not be accomplished
easily in this way.
6. Only after the vehicle stop and
keep steady, the shifting from driving
gear to reverse gear or from reverse
gear to driving gear can be done, or
else, the gear can be damaged.
7. As the fifth gear hositlon is over-
speed gear, in order to avoid the
damage of the overspeed gear
spoke because of overload, when
the vehicle is not in heavy load, run
on good road and its running speed
is under 50 km/h, the fifth gear can
be used to prevent the overspeed
gear from damage because of over鄄
load. When running in the fifth gear
position, if encountering some cir鄄
cumstance, the vehicle speed be鄄
come under 50 km/h, the vehicle
should be shifted into low gear hosit鄄
lon.
8. When running, if find there is ab鄄
normal noise in the transmission,
stop the vehicle and check it, elimi鄄
nate the malfunction.
9. When sliding on the downgrade,
stalling of the engine is unallowed,
starting the engine with the inertia of
sliding on the downgrade is forbid鄄
den to avoid the damage of the gear
and the synchronizer.
10. In the running -in period of the
new vehicle, because the metal
chipping which was produced by the
frictional function between new parts
is bad to components in the trans鄄
mission, especially to the life of the
conical ring on the synchronizer, so
33