DEUTZ-FAHR AGROTRON 106 MK3, Workshop Manual

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5.1.2 HYDRAULIC PUMP
FUNCTION
•
The rotary drive and torque transmitted from the
shaft to the pump is converted into hydraulic energy;
the pressurised flow from the pump varies according
to the demand from the hydraulic loads.
•
The flow rate can be varied by altering the angle of
the swash plate.
STRUCTURE
•
The cylinder block (4) is fixed to the shaft (1) by a
broached fitting
B and the shaft (1) is supported by
the front and rear bearings.
•
The pistons (5) have ball ends; the piston shoes (6) fit
around the ball ends of the pistons to form a single
assembly. The pistons (5) and the shoes (6) together
form a ball joint.
•
The swash plate (3) has a flat surface A against which
the piston shoes slide (6) with a circular motion.
D0005010
4
3
2
1
5
7 6
A
B
•
The pistons (5) stroke axially within their bores in the
cylinder block (4).
•
The rotation of the cylinder block (4) causes the oil in
the bores to be pressurised; the positions of the inlet
and outlet ports are determined by slots in the valve
plate (7).
The oil is drawn into the bores and forced out
through the slots in the valve plate (7).
HYDRAULIC SYSTEM HYDRAULIC PUMP