Re: Pre war fuel pump

Posted by Owen_Dyneto On 2009/11/9 15:04:33

rather than rebuild my "single action" pump on the 36_120B,

Do I take you to mean that you believe the single action pump on your 120 was correct original equipment? According to Hollander the 35/36 Packard 120 didn't use a single action pump but shared the same double action pump, and that pump's use was unique to the 35/36 120. I suppose pictures or data from the 120 parts and/or service manual would be more definitive, though Hollander's is considered to be a very authoritative source.

PS - now browsing PI's fuel pump interchange listing from 1978, it shows AC# 1521807 as a single action for the 1935 120, and AC# 1521808, double-action, also for the 1935 and all 1936 120s.

My old AC fuel pump catalog indicates that only the first 400 1935 120s had the single action, a #1801, and the balance of 1935 and the 1936 120 used #1521808, numbers which don't cross to any other vehicles. The AC catalog also notes a slight difference between the 1935 and 1936 double action pumps, replacement pump #s 475 and 476 respectively. They are apparently interchangeable.

This AC fuel pump, filter and fuel line catalog covers 1926 thru 1953 and has a sizeable section on converting OEM pump numbers into replacement pump numbers.

Be interesting to see what the 120 parts book shows.