34
running speed is under 50 km/h, the
fifth gear can be used .
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
the lubricating oil should be replaced
after the running -in period of the
new vehicle expires. Under general
condition, for every 6000 km running,
replace the lubricating oil once.
When replacing the lubricating oil,
first drain the oil in the transmission,
prop up the rear axle, shift the trans鄄
mission into the reverse gear, add
the kerosene, rotate the transmission
for 2耀3 minutes, then drain the kero-
sene, add the pure gear oil.
11冤 Check the oil level in the trans鄄
mission frequently, if found the level
is under the lower edge surface of
the oil filler bolt hole, sufficient oil
should be added.
12冤 Check the outside bolt of the
transmission and the flange of the
second shaft for tightness and the
operating state of the component in
the transmission frequently, because
the vent plug is blocked by dust and
pressure in the transmission increas鄄
es, the oil seepage or leakage may
be found, so the vent plug should be
cleaned periodically.
13冤 The movement parts of shifting
operation should be kept good lubri鄄
cating, or else, the shifting operation
may become difficult because of the
wear of the movement parts. If found
the position of gear selecting is in鄄
correct, or gear shifting become dif鄄
ficult or the transmission is out of
gear automatically in using, firstly
you should readjust the gear select鄄
ing and gear shifting mechanism.
HFC1048
series trucks
35
(芋) Drive shaft
1.General structure
The two-piece driveshaft, connected
with transmission on the front end
and with rear axle on the back end.
2.Use & Inspection
1冤Driveshaft has been counterpoised
in factory, it should be ensured not to
be impacted in use and not to be
knocked and stacked in disassemble
and carry. Replace if the shaft is dis鄄
torted or the balancer is desquamat鄄
ed, otherwise there will be vibration,
noise, and extra impact in travel, it
can damage power train and endan鄄
ger driver.
2冤Regularly check the cross shaft
needle bearing, check the sealing of
the slide spline and replace the oil
seal when necessary
3冤The first maintenance ,to fill grease
to universal joint ,slide spline ,oil pis鄄
tol ,driving spindle and quickly tight
the blot in order to sliding the univer鄄
sal joint .According to moment ratio
to checking and tighten driving spin鄄
dle and the middle parts of bearing
blots.
The second maintenance ,to check鄄
ing is there anything fall down about
the dirt proof boot ; is there any
problems about move the universal
joint .when cross shaft in the middle
of the needle bearing .The distance
would not be very large .If it is too
large ,you would be disassemble the
universal joint and you can depend
on what you need to changing nee鄄
dle bearing universal joint.
When you do the third maintenance ,
should be disassemble the driving
spindle .Pay attention to sign on
flange ,cross shaft ,link fork, slide
spline in order to mounting .When
you finished all the maintenances ,
please do the blance check , the
standard of dyramic blance is 2750
r/min.The amount of unbalance is
more than 144g.cm遥
渊IV冤 Rear axle
The brief of structure 院Single reduc鄄
tion rear axle ,as the final part of
power train of truck ,is the driving
axle ,and it is composed of final
drive and differential and axle hous鄄
ing .Final drive can not only change