Frozen or clogged fuel line DB 1390

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marcel
Posts: 16
Joined: Sat Sep 12, 2015 4:46 pm
Location: Norway

Frozen or clogged fuel line DB 1390

Post by marcel » Sat Nov 12, 2016 4:55 pm

Today I took my DB1390 out, and after a while suddenly it stopped. No fuel.
To make a long story short, I cannot get fuel from the feeding / primer pump into the filter unit. Primer pump works allright, but no fuel is coming from the fuel line that enters the filter head. It has been cold today -10 or so, so the line is either frozen or clogged, I suppose The filter screen in the primer pump appears to have a hole in it, doesn't help much either.
Now I have to remove the fuel line from the primer pump, which looks like a bit of a job in the freezing cold. Any suggestions for removing this line? In worst case, can I cut this line and replace it with a thin rubber hose?

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ollek
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Location: South West Finland

RE: Frozen or clogged fuel line DB 1390

Post by ollek » Sat Nov 12, 2016 5:09 pm

Frozen water in the fuel inlet line is coming from water in the tank. The proper way to deal with this is to take the tract6or into a warm garage and drain the water from the inlet line and the tank and then change the fuel filters as water have got into the filters as well.

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marcel
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Location: Norway

RE: Frozen or clogged fuel line DB 1390

Post by marcel » Sat Nov 12, 2016 5:41 pm

i don't have a warm garage. The tractor stands in the field now, covered in blankets. I changed the filters a few hours ago. No ice there. (By the the way, where do I put the small O-ring that is supplied with these Perkins filters). So I do have to disassemble the feeding pump from the engine block to get to the fuel line on the feeding pump (on the back of the pump!idiotic engineering)Are the two bolts metric or english, otherwise I have to buy new tools first. I don't simply have no other choice than to remove the fuel line and take it in, trying to de-ice or declogg it. I replaced the rubber hoses between fuel tanks and balance tube two weeks ago, drained the tanks for all the fuel and found just a little bit of water in the diesel.

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bedwards1966
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RE: Frozen or clogged fuel line DB 1390

Post by bedwards1966 » Sat Nov 12, 2016 7:55 pm

You can replace the line with rubber fuel hose, but make sure it's good quality stuff designed for diesel - I've known poor quality rubber pipe which leaked after a couple of weeks and broke in half after a month, after doing only a days work!

Diesel doesn't freeze as such but can turn waxy and block filters but it should still flow through fuel pipes. Your blockage will be either dirt or water which can block a pipe when it freezes. It could be either.

The bolts and pipes on your tractor will be imperial, though sometimes metric spanners are close enough if things aren't too tight. For example, 14mm fits 9/16" tightly and 11mm fits 7/16", 16mm fits 5/8", 8mm fits 5/16". 13mm can usually be used for 1/2" but is a bit sloppy, 17mm for 11/16" is also not a good fit and 19mm for 3/4" is a bit loose. For little jobs you can normally get away with metric but it's not ideal.

As to the fuel filters if the 1390 uses the type I think it does then you have two large square section rings and two or occasionally three O rings. The two big rings are for the top and bottom of the filter and are different sizes, but that's fairly obvious. The larger O ring goes on the filter housing where the hole in the middle of the filter is, this is very important - if it's missing or damaged unfiltered fuel could get through the system into the injector pump and damage it.
The smallest O ring is for the bolt which runs through the filter to hold the bottom piece on, I don't usually bother changing these as they hardly ever leak. If there's another (third) O ring it's for a water drain tap that is sometimes underneath the filter but I don't see them included often.

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dbiow
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Location: Isle of Wight

RE: Frozen or clogged fuel line DB 1390

Post by dbiow » Sat Nov 12, 2016 8:39 pm

You could run a pipe from the lift pump to a fresh can of fuel to get it running and somewhere warmer to work on it properly? Not ideal but could help
885 q cab and 25d on the Isle of Wight.

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marcel
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Joined: Sat Sep 12, 2015 4:46 pm
Location: Norway

RE: Frozen or clogged fuel line DB 1390

Post by marcel » Sun Nov 13, 2016 7:15 am

Thanks for the info guys!

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