Yanmar YM155d Injection Pump Question

/ Yanmar YM155d Injection Pump Question #1  

Flemdog377

New member
Joined
Feb 24, 2026
Messages
8
Location
Pueblo West, Colorado
Tractor
Yanmar 155D
I know it might be an obvious thing but I am knew to this tractor. My 155d I bought recently has a fuel leak and I think its coming from somewhere around the fuel injection pump specifically around a gasket maybe. I personally don't want to deal with timing if i don't have too. So, I'm hoping you wonderful people can guide me. Is there a gasket or is it just the shims? Do the shims do sealing like a gasket as well as timing?
 
Last edited:
/ Yanmar YM155d Injection Pump Question #2  
A picture or two would help tremendously. I can't see where it's leaking from here. If it's leaking from the fuel banjos, see if you can tighten the banjo bolts/nuts about 1/4 turn. This will compress the copper seals and, perhaps, stop your leak. There's two copper seals for each banjo--One behind, one in front. The arrow points to the seal in front of the banjo.

CAV Injector Connect-2.jpg
 

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