Yaroslavl ???-236, Maintenance Manual

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4.8 Centrifugal oil cleaner
4.8.1 During assembling friction surfaces of the oil cleaner parts as well as filler rings 2 and 7
(picture 4.8) should be lubricated with the oil
И-12А.
4.8.2 Oil cleaner shaft 9 should be tightened with the moment of force from 70 to 90 Nwm
(from 7.0 to 9.0 kfg·m).
4.8.3 After the assembling of the rotor body 8 with the rotor cap 5 nut 4 should be tightened
with the moment of force from 20 to 40 Nwm (from 2.0 to 4.0 kfg·m).
4.8.4 Nut 3 should be tightened with the moment of force from 44 to 62 Nwm (from 4.4 to 6.2
kgf·m).
4.8.5 With the tightened nut 3 rotor should rotated free without jerks and constraints form the
manual effort. Clearance E should be from 0.5 to 1.0 mm.
4.8.6 Cap nut 1 should be tightened with the moment of force from 15 to 20 Nwm (from 1.5 to
2.0 kfg·m).
4.8.7 Centrifugal oil cleaner should be tested for the operation and sealing at the stand. Tests
should be performed using the oil
И-12А heated to the temperature from 313 to 323 К (from 40 to 50
°C).
While testing instead of the cap 6 process cap with the motometer indicator to measure the rotor
rotation rate should be installed at the oil cleaner.
4.8.8 Under the inlet pressure of the oil in the oil cleaner 500 kPa(0,5kfg/cm
2)
rotation RTE of the
rotor should be no less than91.6 with
–1
(5500 rpm), oil consumption through the oil cleaner is no more
than 11 dm
3
/min.
Oil leakage through the oil cleaner joints is not allowed.