MTZ 1220.1/1220.3
Section H. Adjustments
H6
FDA adjustments
Checking
and
adjusting
preload
in
drive
pinion
tapered
bearings
The bearings must be adjusted so
that the preload in the driving pinion
bearings be from 0,01 to 0,04 mm. Adjust
the preload by installing two washers (9)
(Figure H-4) of the required thickness.
When adjusting:
- tighten up the bearings with the nut (8)
(Fig. H-4) to a torque of 120 to 150 N•m
When tightening up, rotate the pinion
holding by the flange of the driving pinion
to let the bearing rollers get into the
correct position;
- measure the axial play in the bearings of
the pinion. When there is a play, ensure the
desired bearing preload using the adjusting
washers (9) of lesser thickness. The tightening
torque must be in the range from 0.20 to 1.60
N•m, which corresponds to a force from 5 to
40 N at the radius of drill holes of the flange (7)
of the driving pinion (10);
- after adjusting, lock the nut (8) with a
cotter pin.
At that, to align the nut slots with the holes
for the cotter pin, it is allowed to increase
the tightening torque of the nut.
1, 11 — shims; 2, 5, 6 — tapered roller bearing; 3 — differential; 4 — driven pinion; 7 — flange; 8 - nut; 9 —
adjusting washers, 10 — driving pinion;.
Fig. H-4.
FDA adjustments
Summary of Contents for 1220.1
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Page 161: ...MTZ 1220 1 1220 3 Section I Coupling of implements I15...
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