KIROVETS K-744R1, K-744R2, K-744R3, K-744R4 tractors
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– the leak-tightness of seals of the parts of hydraulic system units by means of a rubber
ring of the round cross-section depends upon cleanness of the sealing surfaces,
conservation of the ring integrity and depth of installation grooves;
– most leaks cannot be eliminated by tightening.
ATTENTION!
It is allowed to start the engine after repair of the system in case when the
intake pipe being is not filled with the working fluid only at the working fluid temperature of
not less than minus 20°С. In case of tractor repair at the ambient temperature below
minus 20°С, fully drain the working fluid from the hydraulic tank and before start-up fill the
hydraulic tank with the working fluid heated to the temperature of 50
–60°. Filling of the
hydraulic tank with the working fluid drained from pipelines during dismantling without
cleaning is not allowed in order to avoid a steering control failure.
ATTENTION!
In order to increase the operational life of pumps, the filling of hydraulic
system after drainage of the working fluid from the oil-intake pipe should be performed as
follows:
1. Refill oil into the hydraulic tank through the oil filler port; in doing so the oil level shall
reach the middle of the housing of filter 11 (Fig.38).
2. Start the engine.
3. Pump out the system by making 3...5 tractor turns to the stop and 4 up and down
movement of the implement.
4. Refill oil into the hydraulic tank.
Installation and operation of high-pressure hoses
During installation and operation of hoses observe the following rules:
a) do not admit any twist of hoses during installation and dismantling, check the
correctness of installation of hoses by the rectilinearity of the marking strip;
b) during installation on the tractor do not admit that the hoses should not rubbed or
damaged by parts of assemblies of the tractor;
c) do not subject the hoses to the action of mechanical loads as it can lead to their
destruction;
d) do not permit the ingress of fuel and lubricants on the outer runner layer of hoses.
7.5.10 Tractor wheel maintenance
Check of the condition of tyres and wheels