1GM10 Fuel Filter & Lift Pump

[Porthandbuoy]

The normal configuration seems to be: Tank - Filter/Coalescer - Lift Pump - Secondary Filter - Injector Pump.

The above results in a lot of joints and 'O' rings on the suction side of the Lift Pump which, if you have a leak, is a sod to locate and fix. In my installation it's 13 connections! 2 copper washers on the suction banjo, 4 connections to the top of the filter/coalescer, 1 bleed on the top of the F/C, 1 assembly bolt on the F/C, 3 'O' rings on the F/C cartridge and bowl, 1 bowl drain fitting and finally a compression fitting on the dip-tube into the tank. And I'm excluding the crimped connections where the armoured hose is connected to the tails.

Any reason why I shouldn't do it this way: Tank - Lift Pump - Filter/Coalescer - Secondary Filter - Injector Pump ?

Far fewer joints on the suction side of the pump, and any poor joints on the discharge side should reveal themselves by weeping (or worse)

(I asked this in a thread a couple of days ago. No replies so I thought I'd post it as a separate thread)

 

[Burnham Bob]

I had a 1GM10 and the coarse filter/separator was immediately after the tank. I can't see why you have so many joins - the feed from the tank went to the filter and the output went to the lift pump. Join of fuel pipe to tank, tank to input of filter, output of filter, input of lift pump - total of four connections. if you have more suggest you can replace all of them with flexible fuel pipe and jubilee clips.

i wouldn't connect the tank direct to the lift pump - it might get all sorts of crud in it. if diesel bug and rubbsh can block filters think of how much more difficult it would be if the blockage was in the pump. changing filters is much easier. and i'm still trying to work out how you get so many joins.......

 

[Porthandbuoy]

I had a 1GM10 and the coarse filter/separator was immediately after the tank. I can't see why you have so many joins - the feed from the tank went to the filter and the output went to the lift pump. Join of fuel pipe to tank, tank to input of filter, output of filter, input of lift pump - total of four connections. if you have more suggest you can replace all of them with flexible fuel pipe and jubilee clips.

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Don't you have a bleed plug and a bolt that holds the filter and bowl together on top of your Filter/Coalescer? Are you forgetting the 3 'O' rings; one between the filter and the top of the assembly, one between the filter and the bowl, and one on the bottom of the bowl? They all add up, and are all fallible. I admit I was surprised when I added them all up.