This is a Mississippi products liability case. Federal jurisdiction is grounded in diversity of citizenship. On appellee’s motion, the District Court granted summary judgment at the close of appellant’s case on the ground, among others, ^[1] that Mississippi recognizes no cause of action where an alleged defect did not cause the occurrence but merely allowed the injurious consequences to take effect. ^[2] In so doing, the trial Judge correctly applied the state doctrine and we affirm.

Appellant was loading logs with one of appellee’s Model 302 tractors, which had been equipped by the distributor with a hydraulic bucket loader. The loading equipment was substantially customized by the substitution for the bucket of a back plate of unknown origin to which were attached forks manufactured by appellee and retainers fabricated by . the distributor, Forestry Equipment Company of Alabama, Inc.

Appellant was loading the logs onto a truck. He had to travel uphill over wet ground to do so. When the wheels of the tractor began to slip, Landrum raised the log on the loader to a nearly overhead position in order to bring its weight to bear on the back wheels. One of the retainers broke and the log fell from the loader injuring him.

Appellant’s cause of action was based on Massey-Ferguson’s failure to equip the tractor with an overhead guard which would have prevented or ameliorated his injuries. ^[3] The law of Mississippi — which we are bound to follow— rejects the extension of strict liability, Walton v. Chrysler Motor Corporation, Miss., 1969, 229 So.2d 568, and the existence of a cause of action for negligence, Ford Motor Company v. Simpson, Miss., 1970, 233 So.2d 797, on these facts. As Mississippi views this the “cause” was the breaking of the retainer, not the absence of the overhead protective guard.

Affirmed.