Yaroslavl ???-236, Maintenance Manual

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4.6.5 Thrust flange 7 should be tightened with the moment of force from 62 to 80 Nwm (from 6.2
to 8.0 kfg m).
4.6.6 Clearance A between face surface of the thrust flange 7 and idler gear 1 should be from
0.13 to 0.35 mm.
4.6.7 Release and regulation valves should be tightened with the moment of force from 50 to 62
Nwm (from 5.0 to 6.2 kfg m).
4.6.8 In the assembled pump gears should rotate free, without constraints from the manual effort,
applied at the drive gear 1.
4.6.9 Pump should be tested for feed and sealing at the stand at the rotation rate of the drive
shaft from 49.6 to 50.4 с-1 (from 3075 to 3125 rpm). Tests should be performed using the oil I-12А,
heated to the temperature from 313 to 323 (from 40 to 50 °C).
4.6.10 Oil feed by the main section of the pump should be no less than 130 l/min at output pressure
from 570 to 630 kPa (from 5.7 to 6.3 kfg/cm
2
). Oil feed by the radiator section should be no less than
23 l/min at output pressure from 30 to 70 kPa (from 0.3 to 0.7 kfg/cm
2
). Induction discharging
should be no less than 15 kPa(0.15 kfg/cm
2
).
4.6.11 Hammering and gear contact with the housing as well as oil leakage through the joints
are not permitted during the tests.
4.6.12 After the tests release and regulation valves should be locked using bending of the edges
of locking washer overhangs at the flattened surfaces of the valve blocks.
4.7 Oil filter
4.7.1 Before installation of the overload relief valve in the filter body 1 (picture 4.7) external
cylindrical surface of the plunger 7 should be lubricated with the oil which is applied in the engine
lubrication system.