Assembly comprising a lubricating liquid manifold, a guide device, a crankpin carrying said rotational guide device and a support carrying said crankpin, said manifold being configured to receive a first flow and a second flow of a lubricating liquid, said first flow and said second flow being separate, said manifold comprising: • a hollow body around a geometric axis of said manifold and provided with: ∘ an inlet port configured to receive said first flow of said lubricating liquid, ∘ an outlet port configured to convey said first flow towards said guide device connected to said crankpin, • a barrier configured to divert said second flow of said lubricating liquid, said barrier comprising: ∘ a shoulder connected to said body and provided with a bearing face, said bearing face being supported against an outer face of said crankpin or against an outer face of said support carrying said crankpin, said bearing face extending in a bearing plane, and ∘ a deflector situated on an opposite side to said outlet port in relation to said bearing plane, said deflector protruding radially outwards from said body locally, moving away from said geometric axis, characterized in that said manifold comprises a diversion space for said second flow situated between said deflector and said bearing plane, and said deflector covers an angle greater than, or equal to, 100° around said geometric axis. said manifold comprising: • a hollow body around a geometric axis of said manifold and provided with: ∘ an inlet port configured to receive said first flow of said lubricating liquid, ∘ an outlet port configured to convey said first flow towards said guide device connected to said crankpin, • a barrier configured to divert said second flow of said lubricating liquid, said barrier comprising: ∘ a shoulder connected to said body and provided with a bearing face, said bearing face being supported against an outer face of said crankpin or against an outer face of said support carrying said crankpin, said bearing face extending in a bearing plane, and ∘ a deflector situated on an opposite side to said outlet port in relation to said bearing plane, said deflector protruding radially outwards from said body locally, moving away from said geometric axis, • a hollow body around a geometric axis of said manifold and provided with: ∘ an inlet port configured to receive said first flow of said lubricating liquid, ∘ an outlet port configured to convey said first flow towards said guide device connected to said crankpin, ∘ an inlet port configured to receive said first flow of said lubricating liquid, ∘ an outlet port configured to convey said first flow towards said guide device connected to said crankpin, • a barrier configured to divert said second flow of said lubricating liquid, said barrier comprising: ∘ a shoulder connected to said body and provided with a bearing face, said bearing face being supported against an outer face of said crankpin or against an outer face of said support carrying said crankpin, said bearing face extending in a bearing plane, and ∘ a deflector situated on an opposite side to said outlet port in relation to said bearing plane, said deflector protruding radially outwards from said body locally, moving away from said geometric axis, ∘ a shoulder connected to said body and provided with a bearing face, said bearing face being supported against an outer face of said crankpin or against an outer face of said support carrying said crankpin, said bearing face extending in a bearing plane, and ∘ a deflector situated on an opposite side to said outlet port in relation to said bearing plane, said deflector protruding radially outwards from said body locally, moving away from said geometric axis, characterized in that said manifold comprises a diversion space for said second flow situated between said deflector and said bearing plane, and said deflector covers an angle greater than, or equal to, 100° around said geometric axis.