KIROVETS K-744R1, K-744R2, K-744R3, K-744R4 tractors
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After each removal and installation of air cleaner in the tractor or its disconnection from the
engine, it is necessary to check tightness of connector areas of the cleaned air supply line to
the engine as well as of the dust removal line from the air cleaner. To perform this check, use
KI-4870-GOSNITI device or U-shaped water manometer. Before the check, tighten all
clamps of line hoses. Perform the check with the engine operating on idle run at the crank-
shaft rotation rate of 30.0 s
-1
(1800 RPM). Press the device tip to the area of connector or
assumed leak-tightness fault. Water level variation in the tube gives evidence of a leak-
tightness fault.
Upon elimination of the fault, check the leak-tightness again.
IT IS PROHIBITED
to operate
the engine with non-tight air feed channels from the air cleaner to the engine and dust suc-
tion channels from the air cleaner.
In the course of operation of the tractor, it is necessary to check leak-tightness of the cleaned
air supply line to the engine in the course of M-1.
IT IS ABSOLUTELY PROHIBITED
to work with clogged or ice-covered grill of the air intake
pipe cover and without free gas outlet from the exhaust pipe, as it leads to the ingress of ex-
haust gases through the dust suction pipe to the air cleaner cartridges.
7.5.4 Cooling system maintenance
Filling and check of the cooling fluid:
а) fill in the tractor cooling system through the expansion tank filler to a level visible via the
sight hole of the tank. When working, do not allow level reduction beyond the permissible
level.
b) avoid leaks of cooling fluid;
c) in order to prevent premature clogging of the cooling system, cooling fluid shall be filled
and drained into a clean reservoir; ingress of oil products therein must be prevented;
d) a drain valve located on the pipe connecting the radiator to the water pump is provided
under the radiator to drain the cooling fluid from tractors with 8481.10/-02/-04, OM460LA
(Mercedes) engines. In tractors with YaMZ- 238ND5 engine, the valve is located on the heat-
ing boiler. There is a drain plug on the left-hand block of 8481.10/-02/- 04, YaMZ-238ND5
engines;
e) fill and refill the cooling system only using automotive cooling fluids specified in the manu-
al for the engine.
