504G3 SERIES TRACTOR OPERATION MANUAL
75
torque.
6.5.2 Adjustment of the spiral bevel pinion and spiral bevel crown gear
Fig.6-4
1. Ba
ck seat 2. Assemblage of the spiral bevel pinion
3. Adjusting shim 4. Assemblage of thedifferential
5. Adjusting shim 6. Front seat
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. Checking 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, bring down the back seat (1) and (6), 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
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