The circuit comprises a main hydraulic pump (52), two main ducts (50, 54),
a booster pump (56), a hydraulic motor (10; 20) which comprises two
elementary motors (11, 12; 21, 22) for driving a first displacement
member (1, 2), and a second hydraulic motor (30; 40) for driving a second
displacement member (3, 4). The second elementary motor (12) is in
parallel with the second main motor (30) while the first elementary motor
(11) and the second main motor (20) are connected to a feed or discharge
additional duct, e.g. via a series link between them. The booster pump
(56) is connected to the additional duct, e.g. an interconnection duct
(60; 62) for interconnecting the first elementary motor (11; 21) and the
second main motor (30; 40). A replenishing valve (70) is suitable for
connecting one of the main ducts to a pressure-free reservoir (51) and
the circuit further comprises means (72) for preventing said replenishing
link from being established on detecting a condition that reveals a spin
situation.