N Tractor 20C 30B 30D+ Backhoe Perkins D3.152. Replaces OEM p/n: Intake Valve: 739060M1, 739060V1, 31431681; Exhaust Valve: 731152M1, 747581M1, 739972M1, 3639880M1, 3637529M1, 3637529V1, 746008M1, 31431991, 31431011, 31431761.