(57) An earth moving apparatus (10) having a base (11) including a ground engaging propulsion
means (12,13) whereby the apparatus (10) may move over the ground, first hydraulic
actuator means (60,61) to drive the ground engaging propulsion means (12,13), a body
(15) carried on the base (11), second hydraulic actuator means (65) for moving the
body (15) relative to the base (11) about a first generally upright axis (A), a working
arm (21) connected at or towards one end (25) thereof to the body (15), third actuator
means (26) for moving the working arm (21) relative to the body (15) about a second
generally upright axis (B) and fourth hydraulic actuator means (28) for moving the
working arm (21) relative to the body (15) about a first generally horizontal axis
(C), and the working arm (21) carrying at or towards a second outer end (29) thereof,
an earth working implement (30), fifth hydraulic actuator means (31) to move the working
implement (30) about a second generally horizontal axis (D), characterised in that
the first, second, third, fourth and fifth hydraulic actuator means are in use, provided
with pressurised hydraulic fluid by a single variable displacement pump (43).
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