Minsk Tractor Works Belarus 1221.2, Disassembly-Assembly Manual

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Disassembly-assembly manual for tractor BELARUS-1221.2/1221 В .2/1221.3/1221.4
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6 WHEELS AND HUBS
6.1 Mounting-dismounting works on wheel dismantled from tractor
Mounting and dismounting tires are dangerous operations, hence they must be carried out only by
competent persons who have corresponding professional knowledge and skills, and relevant
equipment.
Observe the following major rules when dismounting and mounting wheels:
а ) carry out works on specially arranged terrain or inside premises on a platform. Do not perform
tires mounting and dismounting directly on the tractor;
b) use only serviceable mounting tools for mounting-dismounting. Mounting blades must be free of
sharp edges, burrs, rust and mud.
ATTENTION! Never use heavy tools (sledge hammers, and so on) that can lead to tire damage
during disassembly-assembly.
с ) never use faulty defective tires and rims, the rims must be of corresponding size, have no
mechanical damages, bends, dented edges and burrs, and be corrosion-free;
d) deformation of flange lips must be corrected by slight strikes against bent place, using spacers
to avoid dents. Corroded sections must be cleaned of rust, degreased, primed and painted;
e) tires to be mounted must be clean and dry. Inner tubes and tires kept at temperature below -
10° С before bounting must be warmed up inside at temperature about +15° С ;
f) to facilitate mounting-dismounting put soapy solution on tire flanges and rim lips. It is forbidden
to use for these purposes fats or derivatives of petroleum;
g) put rim on clean surface so that valve opening faced upwards. Put tire on rim so that its lower
bead opposite valve opening rested against rim lip, and on the side of valve was in the rim strand;
h) place inner tube inside tire so that to fix valve in the rim opening. Slightly inflate inner tube and
then using the mount lift entire lower flange through rim lip.
j) put soapy solution on higher flange and rim lip. Lift section of bead opposite the valve by the lip
using the mount, and push it inside strand of deep rim. By slight grips gradually lift entire bead over
the rim lip while pressing section of tire already being inside to the strand.
i) put tire on the rim concentrically and start inflation. Keep on inflating until beads of tire take their
position. Air pressure during inflation must be continually controlled and must never exceed
250 kPa. If beads do not take their position before pressure reaches 250 kPa, release air out of tire
and repeat inflation;
k) inflate tire at safe distance from tire or behind special fencing. Length of hose between tire and
pressure gauge being under pressure on the rim must be about 5 m