Joined: Jan 27, 2014 Posts: 151 Location: West Palm Beach FL area
Posted: Thu Aug 13, 2015 10:03 pm Post subject: AC Combo Fuel & Vacuum pump
For my '51 M38 I have found an AC 4698 combo vacuum and fuel pump. I am not sure what is correct for this model jeep, and the pump (and many other things!) have been changed out or modified since it's Gov't Issue.
Is this a correct pump for the '51? Is this an acceptable unit to provide fuel, and vacuum for my wipers, if not exactly correct?
Should this model pump be installed with the fuel pump spacer on the L134 engine?
Thanks and regards, Jeff
_________________ 1951 M38 restoration project - Flightline Jeep MC 23923 DoD 6-51
1954 M-100 Trailer USMC Dunbar Kapple s/n M-750759 DoD 1-54
1947 Willys CJ2A - Harvest Green
1954 Ford F-100 Parts chaser - blueprinted Y-Block
Southeast Florida
That is not a correct pump. The 4698 is the last four digits of the AC part number. Look in your ORD 9 SNL G-740 (M38) Parts Manual. Pages 72 & 73. There are 4 pump part numbers listed there. 9917, 9585, 2659 or 2147 would be correct pumps. In the M38 ORD 8 two more are listed 2655 & 3209
The Army eventually used the later M38A1 pumps on all M38/M38A1/M170's.
From the M38A1 ORD 9 SNL G-740 pages 82 & 83 those correct pump #'s are 9810, 4069, & 4260. _________________ Wes K
45 MB, 51 M38, 54 M37, 66 M101A1, 60 CJ5, 76 DJ5D, 47Bantam T3-C & 5? M100
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