Former senator Abe Murdock, 86, a former Democratic representative and senator from Utah who later served as a member of the National Labor Relations Board for 10 years before retiring in 1947, died of cardio-respiratory failure Saturday at Suburban Hospital.

Sen. Murdock was elected to the House of Representatives in 1932 and served there until winning election to the Senate eight years later. He was defeated in his bid for a second term in 1946 by former Sen. Arthur Watkins (R-Utah).

Following his defeat, he served two five-year terms on the NLRB. He also served for several years in the early 1960s on a presidential panel concerning labor-management relations in the atomic energy industry.

Sen. Murdock was born in Nevada, but moved to Beaver, Utah, at an early age. He attended the University of Utah, then studied law in his father's office before being admitted to the Utah bar in 1922. He was elected county attorney of Beaver County in 1923 and held the post until entering Congress 10 years later.

His wife, the former Vie Yardley, died in 1962.

Sen. Murdock is survived by two sons, William O., of Windham, N.H., and Riggs, of Ogden, Utah; two daughters, Mary Christensen of Chevy Chase, and Cinda Sengstack of Bethesda; a brother, Ray, of Rockville; 20 grandchildren, and 27 great-grandchildren.