A mounting for a baling machine gearbox (26) having connected thereto an input rotary shaft (12) and an output crank shaft (16), the input rotary shaft (12) in an operational position of the gearbox being releasably connected to the gearbox and being rotatable about a first axis, the output crank shaft (16) being rotatable about a second axis that is non-parallel to the first axis and rotatably driving a crank (17) that defines or forms part of a releasable pivot connection to a reciprocable baling machine plunger (19), includes a first, cylindrical support member (21) secured to and extending from at least a first part of a rigid frame (10) inside the baling machine and a second support member (22) secured to and extending from at least a further part of the rigid frame (10) that in use is spaced vertically from the first part of the rigid frame (10). The gearbox includes at least one selectively tightenable and loosenable clamp (23, 24) that encircles the first support member (21) and the mounting includes at least one releasable connection securing the gearbox (13) to the second support member (22), whereby on disconnecting of the input rotary shaft (12) and the crank (17), disconnecting of the releasable connection and loosening of the clamp (23, 24) the gearbox is rotatable from the operational position to an access position permitting access to the plunger (19) while supported on the first support member.
