MTZ 1220.1/1220.3
Section H. Adjustments
H7
Checking and adjusting side clearance in main set
Adjust the side clearance in the mesh
with the differential bearings adjusted. The
side clearance between the final drive
teeth must be from 0.18 to 0.46 mm,
which corresponds to an angular play in
the range from 0.30 to 0.65 mm when
measured on the radius of flange screws
of cardan shaft.
Adjust using the shims (11) (Fig. H-4),
at that the driven pinion must be set to a
dimension of 40.7 ± 0.15 mm from the
drive pinion axle to the mounting surface
of the pinion (4).
When measuring the side clearance,
lock the driven pinion from rotating with a
crowbar or another tool, using the threaded
hole for the filler cap 25 (Figure E-24) in the
FDA housing. The drive pinion must have
no axial play.
Worn pinions are replaced only in pairs.
Do not replace only one pinion, since
pinions are produced by the manufacturer
in pairs
Mesh (contact pattern)
Adjust using the shims (11) (Fig. H-4) to
move the driving pinion (10) or the shims
(1) to move the driven pinion (4) in
accordance with the table below.
The engagement of the teeth (contact
pattern) must be by the length not less
than 50% of the tooth length, and by the
width — not less than 50% of the contact
depth of the tooth. Displacement of the
contact pattern is allowed only to the top
of the drive pinion of the pitch cone.
Adjusting pinion mesh
Contact pattern at
driven pinion
How to adjust pinion mesh
Adjustment scheme
Proper pinion mesh at low load
Move the drive pinion to the driven
one
Move the drive pinion aside from the
driven one.
Move the driven pinion (differential)
aside from the drive one.
Move the driven pinion (differential) to
the drive pinion.
Содержание 1220.1
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