Mf 590 towing capacity

[smcapstick]

Cross between a chock and a nogging. Think it came from WW2 with the Lancaster bombers where 2 lumps of wood went either side of the wheels to stop the plane rolling both attached to a single piece of rope.

Every day's a school day

 

[redneckjack]

Well had a spare hour today so purchased new fuel filter . Opened up manual lift pump and yes the gauze was thick with black sludge , some which had set solid . So cleaned it all up , new fuel filter and seals fitted then started to prime hand pump which felt more like it should . But no fuel flowing from tank . When i checked fuel was low about 3 inch in tank so i guess i need to fill it up tomorrow and rely on gravity to help push it through ? Or have i been stupid and missed something on refitting the fuel filter ? Advice always appreciated

 

[renewablejohn]

Well had a spare hour today so purchased new fuel filter . Opened up manual lift pump and yes the gauze was thick with black sludge , some which had set solid . So cleaned it all up , new fuel filter and seals fitted then started to prime hand pump which felt more like it should . But no fuel flowing from tank . When i checked fuel was low about 3 inch in tank so i guess i need to fill it up tomorrow and rely on gravity to help push it through ? Or have i been stupid and missed something on refitting the fuel filter ? Advice always appreciated

If it was me I would whip the tank off and get it steam cleaned and dried out.

 

[Baker9]

If it was me I would whip the tank off and get it steam cleaned and dried out.

I agree, I had a similar problem with a different make of Tractor but same symptoms. I eventually had to take the tank off and wash it out and it was a plastic tank. There was an awful lot of crap in the tank but when I put the tank back on again and no problems since.

 

[76masseyman]

Was the 590 fitted with trailer brakes back then ? I doubt it. Maybe something plugged into a spool valve.....if you're lucky.

Spool valve option on the 2wd W reg, two door red cab one I had back in the day. But at only 20 ish mph, unless there was an emergency, I just cruised up to a junction and stopped.
I never used it, but we had an 8 ton, 4 wheeled Ransomes trailer. It came with a red pedal that clamped or bolted on top of the tractors own brake pedals. When braking, you pushed down onto it, and it somehow operated the trailers brakes, as you braked the tractor. Not realy sure what that system was.

 

[DrWazzock]

Well had a spare hour today so purchased new fuel filter . Opened up manual lift pump and yes the gauze was thick with black sludge , some which had set solid . So cleaned it all up , new fuel filter and seals fitted then started to prime hand pump which felt more like it should . But no fuel flowing from tank . When i checked fuel was low about 3 inch in tank so i guess i need to fill it up tomorrow and rely on gravity to help push it through ? Or have i been stupid and missed something on refitting the fuel filter ? Advice always appreciated

Usually various bleed screws need opening to let air out at the filter head first and the injector pump second while you pump the lift pump. Close the bleed screws when solid fuel, free from air bubbles is squirting out of the bleed screws. Also, the lift pump handle might not effect much travel of the pump diaphragm if the engine has come to rest in a certain position. Sometimes you need to give the engine half a turn , (a brief operation of the starter) to free the lift pump from the camshaft or whatever drives it, so that the handle can operate the pump to full stroke.

You could always try connecting the lift pump suction side to a clean container of diesel to see if it does suck diesel up and pump it round, before raving the tank off. Is there a drain plug under the tank. I can't remember, but don't try turning it too hard if it's stuck or it might rip out of the tank.

Could be that the lift pump valves have stuck or worn, but sucking from a clean container would test it.

You says it is not drawing fuel from the tank. Is it drawing air in at a bad pipe connection or a cracked pipe? Get a syringe from the vets and some flexible tubing and see if it will suck solid diesel from the tank without too much resistance or blow air back into the tank. Might find its blocked with dirt.

It's a case of eliminating the easy stuff first. I'd only rave the tank off as a last resort. It will probably take a bit of shifting.

 

[Flat 10]

Is that a word? I have never heard 'chog', before

My next door neighbours are masters at inventing words. 'Stublet' and 'chibble' are a couple of recent ones

We have chibbley bits here......

 

[redneckjack]

Lots of good advice . I will fill tank tomoz and see if gravity pushes fuel to union at lift pump , like i said only about 3 inch of fuel in tank today and might be too low to prime manual pump not knowing what height feeder pipe is in tank

 

[Henarar]

Lots of good advice . I will fill tank tomoz and see if gravity pushes fuel to union at lift pump , like i said only about 3 inch of fuel in tank today and might be too low to prime manual pump not knowing what height feeder pipe is in tank

the feeder pipe in the tank on 500 series have be known to rust so they will no longer pick up the fuel from the bottom of the tank

 

[bill and bens dad]

once you get clean diesel out of the injector pump bleed screws tighten them back up and then undo two injector pipe unions,be-careful as it will be under pressure crank it over on the starter hopefully she will start on two cylinders,stop it for safety and tighten the injector unions and bobs your uncle

 

[DrWazzock]

Lots of good advice . I will fill tank tomoz and see if gravity pushes fuel to union at lift pump , like i said only about 3 inch of fuel in tank today and might be too low to prime manual pump not knowing what height feeder pipe is in tank

In any case, the lift pump should be able to suck air then fuel uphill from the tank and prime itself, provided the pipe isn't blocked in the tank and provided the level isn't so low that it is below the end of the fuel supply pipe. It should not need the fuel to be pushed at it by gravity.

So as long as you have a reasonable amount of fuel in the tank, you don't need to fill it right up. Quarter full should be enough, off the red on the gauge.

 

[oakleaf]

the feeder pipe in the tank on 500 series have be known to rust so they will no longer pick up the fuel from the bottom of the tank

Ah thank you. So that is why my 575 "runs out of diesel" every time the needle gets down to half a tank. Is it a big job to replace this feeder pipe?

 

[Henarar]

Ah thank you. So that is why my 575 "runs out of diesel" every time the needle gets down to half a tank. Is it a big job to replace this feeder pipe?

never done one, but its going to be a tank off job, I am not even sure if the feed pipe is welded/fixed in or not

 

[multi power]

Ah thank you. So that is why my 575 "runs out of diesel" every time the needle gets down to half a tank. Is it a big job to replace this feeder pipe?

You sure it's not the gauge?

 

[Henarar]

You sure it's not the gauge?

could dip the tank and find out

 

[oakleaf]

You sure it's not the gauge?

Yes certain .As Henarar has pointed out, first time it happened I dipped the tank to discover it was still more or less half full. Messed about with filters and bleeding etc all to no avail. Brimmed the fuel tank and away she went again untill it got halfway down and the same story . Been that way a couple of months now , not a real problem , just means you have to keep her topped up all the time.

 

[Tomtrac]

Yes certain .As Henarar has pointed out, first time it happened I dipped the tank to discover it was still more or less half full. Messed about with filters and bleeding etc all to no avail. Brimmed the fuel tank and away she went again untill it got halfway down and the same story . Been that way a couple of months now , not a real problem , just means you have to keep her topped up all the time.

Just a thought does it pump fuel Realy well with the lift pump
Happen its the valves in lift pump ie when it gets to half a tank it has to suck fuel up as the fuel level gets below the level of the lift pump and it cannot keep fuel flow going
Had that a few times take lift pump
Apart to check valve springs/seats and for a piece of muck stoping them seal

 

[Fievel Farmanimal]

I remembered now that a kind person down here had opened a 590 tank to see what it looks like inside. I think it's also possible to mix suction and return hoses. Don't work cause return don't go to bottom. Photos:

http://aijaa.com/y3VWAG
http://aijaa.com/zmBXqB

 

[TheTallGuy]

Possibility an option, not standard anyway
Certainly no trailer brakes on the 690, and that was the " posh" model

My 690 has the trailer brake option - shame I don't have a braked trailer to go with it.

 

[oakleaf]

Just a thought does it pump fuel Realy well with the lift pump
Happen its the valves in lift pump ie when it gets to half a tank it has to suck fuel up as the fuel level gets below the level of the lift pump and it cannot keep fuel flow going
Had that a few times take lift pump
Apart to check valve springs/seats and for a piece of muck stoping them seal

Well its certainly worth a shot but as the tank is under the cab surely ALL the fuel is below the lift pump , no?.