KIROVETS K-744R1, K-744R2, K-744R3, K-744R4 tractors
147
e) increase the rotational speed of the engine crankshaft and make several turns of the
tractor to the right and to the left up to the stop and several up and down movements of
the mounted implement;
f) shut off the engine and check the oil level in the hydraulic tank and leak-tightness of
connections; if necessary, refill oil into the tank.
Change of filtering elements of main filters of the hydraulic tank
a) Under fastening nuts 3 (see Fig. 38) and take off cover 1.
b) Dismantle filter 24 with filtering element and install it on the base of housing 14 (with
splint pin 12 upwards).
c) Having squeezed spring 13, take off splint pin 12 and remove the spring.
d) Take off pipe 15 along with filtering element 17 from housing 14.
e) Remove lower rubber ring 16 and filtering element 17.
f) Wash up the filter housing in diesel fuel.
g) Change the filtering element and assemble the filter in the reverse sequence. The
change of the second element shall be carried out in a similar manner.
Pressure filter maintenance
Fig. 39 Pressure filter
1
– electrical visual indicator of
clogging of DE-500 filter; 2
– filter
cup
In order to enhance the operating reliability of the
hydraulic system for steering control, a pressure filter
HMM422C25XNR (Fig. 39) with filtering element
CHP422C25XN is installed on the tractor.
Perform maintenance of the pressure filter in case when
indicator lamps 24 and 26 on the lower block of indicator
lamps of the instrument panel comes on (Fig.1, 2, 3, 4).
In order to perform maintenance of the pressure filter,
unscrew the filter cup, replace the filtering element and
wash the cup. Perform replacement of CHP422C25XN
filters according to signal of the clogging sensor on the
instrument panel.
