8
6.6.1 Checking bogie bearings
To check the status of bogie bearings, loosen the track. By
turning the bogie wheel, check for noise and ease of rotation,
the axial and radial runout.
If a bearing is worn-out, replace it. To replace it, remove the
cheek wheel, remove the retaining ring and remove the bearing.
Check the bearing as indicated in
5.2 on page 5
If the
bearing does not meet the parameters, replace it with a new
one�
In mounting the wheel cheek, do not over-tighten fasteners.
Overtightened cheeks may impede the movement of the wheels
and deform the rubber rim. In tightening, check the wheel travel.
If there is any difficulty, loosen the fasteners.
6.7 Track shafts
Track shafts are an essential element of the transmission. In the
SNOWDOG of the model year 2016-2017 used are track shafts of
two types�
1. The shafts are rigidly fixed to the side plates. The
sprockets rotate on bearings. The shafts are those
driven only�
2. The shafts mounted on bearings. The sprockets are
rigidly fixed to the shaft.
Diagnostic principles are similar for all shafts.
The principles of inspection and maintenance of all types of
shafts are the same.
The shafts should not have more than 1 mm beats, nor should
be bent. Operation of any broken shafts can lead to the tracks
getting off the sprockets and jam, which is fraught with falls
and injuries. The sprockets on the shafts should be arranged in
parallel to each other and parallel to the sprockets on the second
shaft. Failure to observe this condition, sprockets will wear the
track in the windows, which can lead to the track’s getting off the
sprockets. Runout of sprockets no more than 5 mm is possible.
Bearings are another important element of the shafts. The main
cause of bearing failures is corrosion due to ingress of water in
overcoming water obstacles. Replace defective bearings. The
driving shafts are at one of its ends has the spline on which the
driven sprocket is set. The spline should not be damaged.
Damage to the shaft at the spline can be easily detected by the
beating of the driven chain sprocket. A damaged shaft should be
replaced. Beating will lead to chain flinging, and increased wear
of bearings and the structure as a whole.
To maintain the bearings of the driven shaft, it needs to be
removed from the suspension.
1�
Using the wrenches 10 mm, unscrew the 9 bolts and
nuts�
2�
Remove the sidewall of the disc and the sprocket.
3�
Remove the retaining ring.
4�
Remove the bearing.
5�
Check the bearing as indicated in
5.2 on page
5
.
If necessary, replace it with a new one.
6�
Install the bearing.
7�
Install the sprocket and the sidewall of the disc.
!
WARNING
WHEN TIGHTENING THE FASTENERS, DO NOT
OVERTIGHTEN. THIS WILL LEAD TO DEFORMATION
OF THE SPROCKET AND DISC SIDEWALL.
Tighten the nut so that the bolt protrudes 1 mm.
!
WARNING
WHEN TIGHTENING UP TIGHT ALL THE SUSPENSION
BOLTS AND THE BOLTS HOLDING SUSPENSION TO
THE BODY, USE THE ANAEROBIC THREAD LOCKER!
