Posted: Tue Sep 29, 2015 2:33 pm Post subject: AC Fuel & Vacuum pump casting numbers
I have seen recent reference to AC fuel/vacuum pump casting numbers which may be model numbers but are not referenced in any M38 or M38A1 ORD7/8/9 parts books. A review of Ord7/8/9 books reveals many various pumps for M38 and A1: at least 11 by specific part number! So I went through my stock of pumps: the following casting numbers show up on the mounting flange: No hand primer: 9917. With hand primer: 4260, 4260JJ, 4069, 4535, 9810 and 9997. Is there a chart related this apparent AC casting number to the various numbers as they appear in the parts books? ......... Brian
The AC fuel pump numbers on the flange are the last 4 digits only of their full AC number in the ORD 9. Don't ask me why AC did it that way.
As for a chart. Here is a beginning for one:
No hand primer:
9917 = 1539917 Pg 72 of M38 ORD 9 and pg 29 of M38 ORD 8 ORD# 8330132
9585 = 1539585 Pg 72 of M38 ORD 9 and pg 29 of M38 ORD 8 ORD# 7375380 {This pump is also listed TM 9-2320-208-20P (M38A1 Org Maint Parts List as FSN 2910-547-7769 ORD# 8720569)}
2659 = 5592659 Pg 73 of M38 ORD 9 ORD#
2147 = 5592147 Pg 73 of M38 ORD 9 and pg 29 of M38 ORD 8 ORD# 8329527
With hand primer:
2655 = 5592655 Pg 29 of M38 ORD 8 ORD# 8332073
3209 = 5593209 Pg 29 of M38 ORD 8 ORD# 8333104
3249 = 5593249 Pg 29 of M38 ORD 8 ORD# 8720569
4260 = 5594260 Pg 83 of M38A1 ORD 9 ORD# 8720570
4260JJ I think the JJ is a mod level or alteration stamp on a basic 4260
4069 = 5594069 Pg 82 of M38A1 ORD 9 ORD# 8720569
4535
9810 = 1539810 Pg 82 of M38A1 ORD 9 ORD# 8329705
9997
I would guess 4535 & 9997 were produced by AC after the last IPL which would have been after 1966. _________________ Wes K
45 MB, 51 M38, 54 M37, 66 M101A1, 60 CJ5, 76 DJ5D, 47Bantam T3-C & 5? M100
Based on the available data I am confident any of the above pumps will work on the M38 and M38A1. As for which is correct I would assume the first pump shown in each model's ORD 9 would most likely be the factory original. That is if you don't have any more definitive factory data that you can research.
There are a few civvy dual pumps that will work but use tube nipples instead od threaded tubing and pipe openings.
Wes K
45 MB, 51 M38, 60 CJ3B, 60 CJ5, 76 DJ5D, Bantam T3-C MVPA22099 _________________ Wes K
45 MB, 51 M38, 54 M37, 66 M101A1, 60 CJ5, 76 DJ5D, 47Bantam T3-C & 5? M100
9585 = 1539585 Pg 72 of M38 ORD 9 and pg 29 of M38 ORD 8 ORD# 7375380 {This pump is also listed TM 9-2320-208-20P (M38A1 Org Maint Parts List as FSN 2910-547-7769 ORD# 8720569)}
It is listed in the 66 edition of TM 9-2320-208-20P for the M38A1 as a cross reference for the later FSN & ORD#. _________________ Wes K
45 MB, 51 M38, 54 M37, 66 M101A1, 60 CJ5, 76 DJ5D, 47Bantam T3-C & 5? M100
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