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Isuzu N-Series. Manual - part 1235
0.30mm,0.40mm, 0.45 and 0.5mm.
Normally, the clearance between
these two gears is 0.15 -0.25mm,
while the side play ranges under
0.07mm. To adjust side play, mea鄄
sure four points with equal angle
around the driven gear, and the
gauge outfit of micrometer should be
in a vertical position.
To adjust tooth contact area, driven
gear should be coated with red lead
in three points, and 2-3 teeth should
coated in every point. Then rotate
gears clockwise and anti -clockwise
to get the trace of contact area. (see
the right figure). If tooth contact area
doesn't conform to the requirement
showed in figure (a), adjust it to con鄄
form to the requirement. If trace devi鄄
ate from convex or concave tooth
root, add adjusting shim. If trace de鄄
viate from convex or concave tooth
top, reduce adjusting shim.
Correct contact trace should deviate
from toe end of tooth, as figure (a),
trace deviate from convex or con鄄
cave tooth root, as figure (b), trace
deviate from convex or concave
tooth top, as figure(c).
Adjustment of rear axle's hub bear鄄
ing: tighten the bearing lock nut to a
certain force moment and release 1/
3 -1/4 circle. Pre -tightening force
moment is 490-588N.m
Maintenance of rear axle:
1. Hyperbola bevel gear requires a
strict standard of lubricating, only
can be filled with specified gear oil.
Don't use or mix with other gear oil,
or else, it will result in quickened
scratch and wear.
2. Don't remove or adjust the conical
gears and bearings of final drive, for
they have been matched and adjust鄄
ed in factory. Removing and adjust鄄
ing should be done only as the gears
are worn and the gear clearance is
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OWNER爷S MANUAL for
HFC1061,HFC1063,HFC1083
series trucks
beyond the specified value or the
bearing axial clearance is too large,
or the damaged parts must be re鄄
placed.
3. Clean the vent plug regularly, dis鄄
assemble it when doing class -one
maintenance to make sure ventilation
expedite. A jammed air drain can
bring higher air pressure in the rear
axle, which will result in lubricant leak
from the drive pinion seal and other
welding line. Check the level of lubri鄄
cant in axle housing.
4. For a new vehicle, lubricant should
be replaced when doing class -two
maintenance. Afterwards, check the
quality of lubricant during class-two
maintenance every time. Replace
new lubricant if color -change or
thinness has taken place.
5. Dismantle the rear cover when do鄄
ing class -three maintenance. Clean
the inner cavity and final drive as鄄
sembly, screw bolt and nut referring
to the specified force moment.
Frame
Brief description of structure:
Truck of this series is of side-mem鄄
ber structure.
Using and maintenance
Side member, cross member and
every component fixed on the frame
are connected using rivet or thread
and welding. Only when all the com鄄
ponents are in perfect condition, can
the frame be used well. Having over鄄
all check when doing class -three
maintenance. Tighten the rivet and
thread if they loose and renovate the
cross member in time if there are
crack and shape distortion on it.
Shape distortion and damage of
frame have close relationship with
overloading and parking location and
driving condition (vehicle speed and
road condition).
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