Quote:
Originally Posted by 38 coupe
My memory is the post-war 59 motor used 80 lb pumps, just long body versions without internal pressure relief valves.
edit, looked in the Green Book for clarification and came back with both verification of 80 lb pressure post war and more questions.
- The section on sending units shows 50 psi sending unit pre-war and 80 psi sending units post-war. This part is clear, post-war Fords were designed to use 80 psi max systems.
- The section on oil pumps agrees with the above post-war pressure change and leaves me with questions.
- There are two 59A part number oil pumps, 59A 6600 A1 and 59A 6600 A2.
- There is a note associated with 59A 6600 A1 pumps that "When replacing 18-6600, 48-6600, 68-6600 also use 1 of each 41A-6654 Spring (oil relief valve) in cylinder block and 41A-9278. Also use 41C-9273 when higher pressure readings are necessary." This instructs the user to swap the in-block pressure relief spring an oil pressure sending unit when installing the newer design oil pump.
- The 59A 6600-A2 pump is the one that raises questions for me. This pump is stated to have helical gears. I assumed that this was a long body pump with helical gears. However, I find part number 8BA 6654 listed with the description "Spring (oil pump body relief valve)-use with 59A-6600-A2".
My question: is the 59A 6600-A2 pump a long body pump or an 8BA style pump with internal bypass? |
On page 279 of Green book it shows 59A6600 A1 with the same relief spring in block relief as it does for the 59A-6600-A2 pump only the spring p/n is 8BA 6654.
This is why I think the helical gear pump also has a 50# relief spring.