JAC HFC1061 Owner's Manual - page 21
knock and stack when doing disas鄄
sembly and assembly work or carry鄄
ing. Replace for a new one if the
shaft is distorted or the balancer is
desquamated, otherwise, there will
be vibration, noise, and extra impact
in running, which can damage other
assemblies and even endangered
running.
2. Check oil seals of center support鄄
ing bearing, needle bearing of cross
shaft, sliding spline regularly, replace
invalid oil seals instantly
3. When doing class -one mainte鄄
nance, lubricate the universal joint,
slide spine and intermediate bearing.
When adding lubrication to the uni鄄
versal, extrude the oil pistol quickly
to fully lubricate the needle bearing
of universal joint, check and tighten
drive shaft and the connecting bolt in
every position of intermediate sup鄄
port.
When doing class-two maintenance,
check whether the dust cap drop
and whether the universal joint's free
rotate motion get stuck. When the
cross shaft lies in the needle bear鄄
ing, tear down the universal joint if
the radial play is too wide. Replace
the needle bearing or cross shaft ac鄄
cording to your requirement
When doing class -three mainte鄄
nance, disassembling the drive shaft
is necessary, pay attention to making
the mutual mark for the flange yoke,
cross shaft and connecting yoke. For
slide spline shaft, make the cooper鄄
ative mark on the flange so as to
mount on the original position. After
finishing all the maintenance items,
having balanced check again is bet鄄
ter. The standard of dynamic bal鄄
ance is 2750 turn per minute and the
unbalanced volume is less than
144g/cm
36
OWNER爷S MANUAL for
HFC1061,HFC1063,HFC1083
series trucks
Rear axle
Brief description of structure:
Rear axle is single reduction driving
axle, which is composed of final
drive and differential and axle hous鄄
ing. It is medium and final class
speed reduction driving mechanism
in driving system. Final drive can not
only change the direction of driving
force, but also reduce the rotate
speed. It's composed of drive pinion
and driven gear and final drive. The
drive pinion is connected with drive
shaft, whose end with spline is con鄄
nected with universal joint assembly
by coupling flange. Driving bevel
gear's toe end axle journal is mount鄄
ed on guiding cylindrical roller bear鄄
ing and bears radial force only.
Driven gear is also called crown gear
and is fixed to left half flange of the
differential case with bolts. Differen鄄
tial is a kind of device that is com鄄
posed of differential case, cross
shaft and four planetary pinions is a
device that makes the left wheel and
the right wheel run at a different
speed when necessary. Rear axle
housing is an integrated axle housing
that is made of welding punched ar鄄
mor plate.
Final drive's tooth face meshing and
adjustment of gear lash
1. Check drive gear bearing's pre -
tension level. The pre -tension force
of drive gear bearing should be ad鄄
justed. When measuring bearing
case's bolt hole , tangential stress is
15-30N.
2. The adjustment of drive gear bea-
ring's pre-tension force is a process
of adding and reducing number of
adjusting shim. When adjusting shim
adds, friction moment will be re鄄
duced. When adjusting shim re鄄
duces, friction moment will be
added. Thickness of friction moment
has three norms of 0.40mm, 0.45mm,
0.50mm.
3. Check final drive for meshing be鄄
tween drive pinion and driven gear .
The contact area and side play be鄄
tween drive pinion and driven gear
can be adjusted by means of adjust鄄
ing shim and adjusting collar of dif鄄
ferential bearing. There are four kind
of shims according to thickness,
37