Case 450

View attachment 222809 I have a case 450 dozer . Serial number 3068986 . On the torque converter their is the pressure regulator and relief valves . I got them mixed up and was wondering if anyone knows which is which ? Here is a picture of them . Notice the larger groove near the top of one piston . I have the service manual downloaded on my computer but the picture is so fuzzy I can’t tell which is which . Thank you !