MF 7400 questions and answers

[davidroberts30]

Does the 7400 series have special weaknesses you should be aware of ?
They seem to handle many working hours compared to those with a regular gearbox, while one with a regular gearbox is mostly used up at 7-8000 hours, many of the VT models are still in good condition after 12-14000 hours, is this something you also see?

mine is 12.5k hours and i think it still looks tidy

 

[Antares 6]

Hi, where should the switch to the right for the cabin suspension stand for maximum suspension, like on the photo or the other way ? and what are the different settings for?

 

[davidroberts30]

each side of the switch is different pressures
with engine running you should be able to feel the cab move slightly by pressing 1 or the other
i wont be surprised if you don't though ,it don't work the best

 

[Antares 6]

I think i can feel the cab move, will/should it rise on the smothest position ?
I can see that the cab move 1-2 inches sideways ageins the hood when driving, expected more suspension....but everything is better than nothing ))

 

[davidroberts30]

im not sure which way round it is but 1 setting the cab will sit slightly higher than the other as running slightly higher pressure

 

[Antares 6]

Ok, thanks, I'll take one measure of the airbags to see how much they lift in both positions, good to know.

 

[davidroberts30]

Ok, thanks, I'll take one measure of the airbags to see how much they lift in both positions, good to know.

if you ever hear the cab air compressor running for more than a minute or 2 or more often than once a hour PULL THE FUSE OUT and fix the leak

 

[Antares 6]

I never hear it if i not use the switch.

 

[Antares 6]

Hi, Should this symbol appear on the display when I adjust the engine/underspeed supervisor up steep slopes?

 

[davidroberts30]

Hi, Should this symbol appear on the display when I adjust the engine/underspeed supervisor up steep slopes?

Yes
That symbol means the enging is being supervised, ie it's under sufficient load to slow the transmission down

 

[Antares 6]

I do not get this symbol even if I use engine supervisor from 5% -50% (or what the% is), achieve a maximum of 23-24km / hours up steep slopes in both high and low gear, works best on about 25% engine superivisor .
Exactly the same speed on both hare and turtle, that tells me it not is the engine...?
The tractor should probably manage 30km in low gear / turtle up steep slopes by normal road without anything other than a snow blower on the drawbars?
There is no difference between pedal mode and liver mode.
Could it be oil / filter that is the cause?
What do you think ?

 

[davidroberts30]

I do not get this symbol even if I use engine supervisor from 5% -50% (or what the% is), achieve a maximum of 23-24km / hours up steep slopes in both high and low gear, works best on about 25% engine superivisor .
Exactly the same speed on both hare and turtle, that tells me it not is the engine...?
The tractor should probably manage 30km in low gear / turtle up steep slopes by normal road without anything other than a snow blower on the drawbars?
There is no difference between pedal mode and liver mode.
Could it be oil / filter that is the cause?
What do you think ?

Not sure then maybe pto ?

 

[Antares 6]

I will conyact my MF dealer, one of the mechanics there have an 7480, i have a fealing that it is the oilfilters/oil or calibration.
If the turbo not worked i belive it should smoke black, agree ?
I will let you know.

 

[davidroberts30]

I will conyact my MF dealer, one of the mechanics there have an 7480, i have a fealing that it is the oilfilters/oil or calibration.
If the turbo not worked i belive it should smoke black, agree ?
I will let you know.

Have you done the calibration yet?

 

[Antares 6]

No, i am afraid i do something wrong
I will have a look at it agein tomorrow, maybe i should see if i understand the way to do it.....i not have to do anything else of the 4 calibrations i got ? only the transmision calibration ?

 

[davidroberts30]

No, i am afraid i do something wrong
I will have a look at it agein tomorrow, maybe i should see if i understand the way to do it.....i not have to do anything else of the 4 calibrations i got ? only the transmision calibration ?

If you make a mistake it reverts to the last setting
It took me a few attempts to calibrate as I didnt follow the instructions to the letter

 

[Antares 6]

Is it enought to use/follow this sheet ?

 

[davidroberts30]

Is it enought to use/follow this sheet ?

Theres 3 calibration to do in the pages I posted further back in the thread
You need to do the 3 and follow the instructions to the letter

 

[Antares 6]

I understand, they must be taken in the right order, will see if I make one attempt tomorrow)) is this the same way to perform calibration as the dealers do.

 

[davidroberts30]

I understand, they must be taken in the right order, will see if I make one attempt tomorrow)) is this the same way to perform calibration as the dealers do.

Yes