504G3 SERIES TRACTOR OPERATION MANUAL
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0.32mm. Measure it for 3 times and at 3 point which equally at the circle. The
difference between them should be less than 0.1mm. If it failed to reach the request,
adjust the thickness of adjusting shim (5). At last, put all of the components on.
2. Checking the meshing zone
The meshing zone can be measured by smear test, painting the crown gear teeth with
some colors such as red lead or Prussian blue. The standard meshing zone should be in
the middle of all the teeth face and deflecting to small end of teeth slightly. It’s length at
least equal to 55% of the width, and it’s height equal to at least 55% of the tooth’s
height. If the meshing zone doesn’t accord with the proper position, adjust the thickness
of the shim (3) and (5).
During the adjustment, when it has the proper meshing zone, but without the correct
clearance, or on the other way, it should be better to get the proper meshing zone, with
the clearance not less than 0.2mm.
6.5.3 Adjustment of front axle final transmission
There are two couples of gears in the front axle final transmission (As Fig.6-5 shows,
one couple is piece 1, 2 and another is piece 4, 5). They have been adjusted in the
factory, generally, there is no need to adjust them by the users unless replacing the
bearings and gears or do some repairs. The two couples have the same way to be adjust,
here will give the example.
Before adjusting, bring down the tire, raise the front axle. Remove the steering arm (8)
and upper bearing cover (7), adjust the clearance between drive pinion (4) and drive
pinion (5) through changing the thickness of adjusting shim (6).
Generally, the clearance is between 0.16 to 0.3mm. After the adjustment, reinstall all of
the components. It’s better to ask someone professional to finish the work.
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