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Drain 770 Tank

Posted: Wed Feb 13, 2019 4:08 pm
by tractorfan
What’s the easiest way to drain a 770 fuel tank, bearing in mind the outlet is at the top?

Thank-you.

Re: Drain 770 Tank

Posted: Wed Feb 13, 2019 4:37 pm
by db2d
I used to syphon the fuel out using a large syringe or an airline to start the process.

Re: Drain 770 Tank

Posted: Wed Feb 13, 2019 5:50 pm
by rid54
How is the 770 tank different from an 880 tank? I was thinking, that my 880 has a fuel shutoff valve in the line to the feed pump. This is a type of valve that can be taken apart by pulling out the valve core once a stop screw is removed. Fuel will then flow out of the valve body. A funnel or a suitable hose may then be used to catch the fuel.

Re: Drain 770 Tank

Posted: Wed Feb 13, 2019 8:11 pm
by tractorfan
I could be wrong but the fuel delivery system to the sediment bowl on the 770 is different to that of the 880. There doesn't appear to be a shut-off valve, and the pipe leaving the tank for the engine isn't at the bottom of the tank as per the 880, but is at the top.

Re: Drain 770 Tank

Posted: Thu Feb 14, 2019 2:22 pm
by ollek
The 880 Implemtic had the pipe fitted to the bottom of the tank and had a shut off valve. All Selectamatic models had the pipe fitted the front top of the tank. The 770 is a Selctamatic. There is no shut off valve in a Selectamatic and there is no 770 Implematic.

Re: Drain 770 Tank

Posted: Fri Feb 15, 2019 8:28 pm
by tractorfan
My 880 Selectamatic has the fuel pipe leaving the bottom of the tank to a shut-off valve before making its way to the sediment bowl.

Problem solved with the 770. I just disconnected the pipe at the sediment bowl and the diesel flowed out. I thought it was going to be a bigger job than envisaged.

Thanks for the replies.

Re: Drain 770 Tank

Posted: Fri Feb 15, 2019 10:09 pm
by rid54
tractorfan wrote:
Fri Feb 15, 2019 8:28 pm
My 880 Selectamatic has the fuel pipe leaving the bottom of the tank to a shut-off valve before making its way to the sediment bowl.

Problem solved with the 770. I just disconnected the pipe at the sediment bowl and the diesel flowed out. I thought it was going to be a bigger job than envisaged.

Thanks for the replies.
That's what I find with my 880 Selectamatic too. Perhaps there are differences between delivery regions.

Re: Drain 770 Tank

Posted: Sat Feb 16, 2019 4:20 am
by cobbadog
What was the design idea to have the fuel outlet at the top of the tank? Was it in a confined space?