Belarus 1523, Руководство по эксплуатации

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BELARUS-1523/1523 В /1523.3 /1523В.3 Construction and Operation
137
Metering Pump
The metering pump consists of assembly
I, distributor II, non-return valve (9), two
anti-hammer valves (7), relief valve (6)
and two anti-vacuum valves (8).
1 – stator; 2 – rotor; 3 – spool valve; 4 – power shaft; 5 – sleeve; 6 – relief valve; 7 – anti-
hammer valves; 8 – anti-vacuum valves; 9 – non-return valve; 10 – body.
I – pumping assembly; II - distributor
The Gerotor pumping assembly I con-
sists of the stator (1) fixed on the body
and rotating rotor (2) connected to the
spool valve (3) by the power shaft (4).
The distributor II consists of the body
(10), sleeve (5) and spool valve (3)
splined onto the tail-end of the power
shaft of the steering column:
The relief valve (6) limits the maximum
pressure in the pressure mainline to
within 17.5...18.0 MPa (175...180
kgf/cm
2
) in the HPS system with the
double-rod hydraulic cylinder or to within
14.0...14.5 MPa (140...145 kgf/cm
2
) in
the HPS system with two hydraulic cyl-
inders of steering control.
The anti-hammer valves (7) limit pres-
sure in the cylinder mainlines at impact
loads. The pressure setting of the anti-
hammer valves is within 22.5...24.5 MPa
(225...245 kgf/cm
2
).
The anti-vacuum valves (8) make it pos-
sible to ensure the required supply of
the working fluid into the hydraulic cylin-
der in the emergency mode and in case
of operation of the anti-hammer valves.