A plough sole breaker arranged to be connected to a plough body , extendable below a working depth of the plough body , the plough sole breaker comprising: a bracket arranged to be attached to the plough body , a forward portion of the bracket comprising attachment means ; a tine being connected to a rear end portion of the bracket , wherein the tine is pivotal about a transverse, horizontal axis between a first orientation (PI), where the tine is in an active working state extending downwardly, and a second orientation (PII, Plla), where the tine is in an inactive idle state facing away from the first orientation (PI) wherein a first end portion of the tine is provided with a hub comprising a bore arranged to accommodate a shaft extending transversely from the rear end portion of the bracket , a centre axis of the shaft constituting the pivot axis of the tine , characterised in that the bore is stepped, a first bore portion facing the bracket having a radial clearance to the shaft , and a second bore portion bearing against a portion of the shaft , said first bore portion and the corresponding encircled portion of the shaft defining an annulus accommodating a compression spring , a first end of the compression spring abutting a surface forming a transition between the bore portions , and a second end of the spring abutting the bracket ; and an end face of the hub opposite the first bore portion is provided with two radial, diametrically opposite recesses arranged to rest against a pin extending through a radial through-bore in an end portion of the shaft , the pin being oriented to engage with the recesses when the tine is in its first orientation (PI). a bracket arranged to be attached to the plough body , a forward portion of the bracket comprising attachment means ; a tine being connected to a rear end portion of the bracket , wherein the tine is pivotal about a transverse, horizontal axis between a first orientation (PI), where the tine is in an active working state extending downwardly, and a second orientation (PII, Plla), where the tine is in an inactive idle state facing away from the first orientation (PI) wherein a first end portion of the tine is provided with a hub comprising a bore arranged to accommodate a shaft extending transversely from the rear end portion of the bracket , a centre axis of the shaft constituting the pivot axis of the tine , characterised in that the bore is stepped, a first bore portion facing the bracket having a radial clearance to the shaft , and a second bore portion bearing against a portion of the shaft , said first bore portion and the corresponding encircled portion of the shaft defining an annulus accommodating a compression spring , a first end of the compression spring abutting a surface forming a transition between the bore portions , and a second end of the spring abutting the bracket ; and an end face of the hub opposite the first bore portion is provided with two radial, diametrically opposite recesses arranged to rest against a pin extending through a radial through-bore in an end portion of the shaft , the pin being oriented to engage with the recesses when the tine is in its first orientation (PI). <EOS>