Oil Tank; Hll Pump Drive - Belarus 1822.3 Operator's Manual

3.15.2 Oil tank

The tractor has an oil tank 2 installed (figure 3.15.1) with a capacity of 35±0,5 liters,
which is equipped with a breather 16 and oil an oil level gage 3. Oil is filled through a filler neck
1. For oil drain there is a plug on the tank lower surface. The tank has an HLL emergency oil
temperature indicator installed, as specified in subsection 3.16 "HLL emergency state indica-
tion".

3.15.3 HLL pump drive

The HLL oil pump is gear-type, with right-side rotation. The pump drive is disen-
gageable, coupling clutch independent, mounted on the left side of the coupling clutch
body.
The HLL pump drive consists of a housing 1 (figure 3.15.4), a gear 2, mounted on
splines of a shaft 3, rotating on two roller bearings. Balls 4, placed in the hole of the shaft
3, close or open the shaft and a splined bushing 5 by means of a sleeve 6. The sleeve 6 is
controlled by a yoke through a tetrahedron of a shaft 7.
The gear 2 is permanently meshed with the PTO drive gear. In a disengaged posi-
tion the sleeve 6 is displaced to the extreme right position, the balls 4 come out of meshing
with the bushing 5 under the influence of centrifugal forces, and the shaft 3 and the gear 2
are freely rotating on the bearings. In engaged position (the sleeve is displaced into the
extreme left position) the balls 4 are driven into the holes of the bushing 5 by cone part of
the sleeve 6, and rotation is transferred to the pump shaft from the gear 2 through the
shaft 3 and the splined bushing 5. The drive provides 1890 rpm of the pump 10 shaft at
engine rated speed, and the ball-type clutch (members 3, 4, 5, 6) allows to turn the pump
on/off with the engine running at min. idle speed. Rules of turning the HLL pump on/off are
given in clause 2.16.1.
1 – drive housing; 2 – gear; 3 – shaft; 4 – balls; 5 – pump shaft bushing; 6 –
sleeve; 7 – shifting shaft; 8 – lock plate; 9 – bolt; 10 – HLL pump.
Figure 3.15.4 – Pump drive
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