KNEGT 504G3 Series, Руководство по эксплуатации

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504G3
SERIES TRACTOR OPERATION MANUAL
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changed or this part needs a repair. When adjusting, screw down the bolts 3 (totally 4),
get down the assemblage of spiral bevel pinion, then clamp the assemblage to a table
vice or other work platform. Loose the locking nut 1, and then knock the spiral bevel
pinion and the bearings down. Change the bearings and locking nut. Make sure there is
a torque of 1.5 to 2.5Nm when rotating the pinion. If no equipment or tool can be used
to measure the torque, ask somebody who is experienced for help. At last, lock the
locking nut.
6.4.2 Adjustment of the spiral bevel pinion and spiral bevel crown gear
Correct meshing zone and right clearance between tooths of the drive pinion and crown
gear can influence the life of the main drive and the noise (Fig.6-3). Because of
abrasion of the gears and bearings, the clearance increases. As a result, the gears can not
work in the correct meshing zone. There is no necessary to adjust only when it effect
the gears to work normally or the bearings and the bevel gears need to be replaced or
the assemblage needs to be repaired. (The adjusting needs to be done after the bearings
have been fastened.)
1. Check the clearance between the teeth
Make sure the clearance of the pinion and crown gears at the stated range. Only when
the clearance is large enough, it should be adjusted.
When adjusting, put a lead piece between the teeth of pinion and crown gears. The lead
piece will be pushed to transform. Then measure the thickness of lead piece near the big
end. The proper clearance changes from 0.16 to 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 adjusting nuts (9) and (13).
2. Checking the meshing zone
Through measuring the meshing zone, we can know if the gears work normally. 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 its height equal to at least 55% of the tooth’s height.
If the meshing zone doesn’t accord with the proper position, the bevel gears should be
adjusted.