D15 diesel - getting fuel to the filters
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Category: Allis Chalmers
Forum Name: Farm Equipment
Forum Description: everything about Allis-Chalmers farm equipment
URL: https://www.allischalmers.com/forum/forum_posts.asp?TID=212668
Printed Date: 01 Nov 2026 at 9:04am
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Topic: D15 diesel - getting fuel to the filters
Posted By: DSeries4
Subject: D15 diesel - getting fuel to the filters
Date Posted: 01 Nov 2026 at 7:19am
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I have my series 2 diesel looking more stock than when I got it. However, I am not able to get fuel from the tank up into the filters. I have 1/4 tank of fuel and I have had new seals put in the hand primer, but I cannot get it to pull fuel up to the filters. The primer was tested separately and it does work. I do have a very small leak on the 90 coming out of the sediment bowl if that makes a difference. Would filling the tank full make a difference?  ------------- '49 G, '54 WD45, '55 CA, '56 WD45D, '57 WD45, '58 D14, '59 D14, '60 D14, '63 D15D, '66 D15II, '66 D21II, '67 D17IV, '67 D17IVD, '67 190XTD, '73 620, '76 185, '77 175, '84 8030, '85 6080 |
Replies:
Posted By: steve(ill)
Date Posted: 01 Nov 2026 at 7:24am
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it should work at 1/4 tank, but if you look at that level compared to the filtes, the fuel level is only partialy up inside the filters.. a good test would be to fill the tank and test again... and YES.. any minor fuel leak can be a MAJOR air leak and cause loss of suction.
--------------------- this is WATER instead of FUEL... but gives you a good idea of a "MINOR LEAK"... How This Affects Flow Through a Crack
------------- Like them all, but love the "B"s. |