MF 6470 engine bother.

[Cowabunga]

Does anyone ever have the valve clearances checked nowadays ? Most manufacturers recommend it. Always something that was checked back in the day.

Yes at the first service and then around 1200 hours, after which they tend to settle down. I had them checked on my NH about 18 months ago because I thought it sounded slightly tappety at 8000 hours or so, but all clearances were fine.

 

[tweedale terrier]

I didn’t think that would be done at a first service

 

[Cowabunga]

I didn’t think that would be done at a first service

Depends on the engine type. Sisu two valve Fortius engines, no. Four valve Citius engines, yes. New Holland series 60 and early Powerstar engines, yes. Later ones in black chassis tractors, no.
It depends on the design, the manufacturer's recommended interval and possibly most importantly, the experience of the skilled mechanic with that particular model of engine, including the sound of individual engines.

 

[Dman2]

Our local Claas fitter has an obsession with checking valves
Can guarantee that anything that goes into Rickerby`s Bowburn will have the valves set before it comes out

 

[tweedale terrier]

Depends on the engine type. Sisu two valve Fortius engines, no. Four valve Citius engines, yes. New Holland series 60 and early Powerstar engines, yes. Later ones in black chassis tractors, no.
It depends on the design, the manufacturer's recommended interval and possibly most importantly, the experience of the skilled mechanic with that particular model of engine, including the sound of individual engines.

I meant in new tractor first service.

 

[Cowabunga]

Our local Claas fitter has an obsession with checking valves
Can guarantee that anything that goes into Rickerby`s Bowburn will have the valves set before it comes out

The issue with some types of four valve engines, not particularly tractor engines though, is that valve clearance tends to decrease as they age, not increase. This has no relevance to most tractor engines to my knowledge, but it is something to be aware of.
Most are adjusted with a screw and lock nut but the early Powerstar NH/Case engines have tapered thread adjusters, which are actually dead simple and surprisingly [to me initially] very reliable and dependable.

 

[Cowabunga]

I meant in new tractor first service.

Yes. That is what I answered.

My reply to Dman2 is relevant to engines with some more hours on the clock.

 

[Pheasant Surprise]

Hydraulic lash adjusters on many car engines has dropped the need (pardon the pun) for valve adjustment completely. Not really fitted to heavy vehicle, tractors and off-road diesels though.

 

[fermerboy]

Thanks for all replies,
I have no direct experience with Sisu engines but always believed them to be fairly tough strong pulling motors.
My neighbour has had no other bother in a fleet of MF between him and his BiL.
The one which recently failed has always been noisy in the timing case area, but has got to 4100hrs till this happened.
These owners are not kicking off about it, or looking for sympathy/help from MF, more just wondering if there is an underlying weakness, hence the question. It appears not from the replies!!!
Sh!t happens I guess!

 

[2wheels]

Hydraulic lash adjusters on many car engines has dropped the need (pardon the pun) for valve adjustment completely. Not really fitted to heavy vehicle, tractors and off-road diesels though.

the later tm/mxm engines had hydraulic tappets.

 

[Cowabunga]

the later tm/mxm engines had hydraulic tappets.

Which is why I mentioned that later black chassis TM models didn't need adjusting.

 

[2wheels]

Which is why I mentioned that later black chassis TM models didn't need adjusting.

aye but didn't seem to register with some.

 

[Pheasant Surprise]

the later tm/mxm engines had hydraulic tappets.

True enough. I guess the point I was trying make is that they’ve been more or less universal in cars and light commercial engines for a while. Not so on everything

 

[Cowabunga]

aye but didn't seem to register with some.

I must be getting to be too subtle, quiet and discreet in my posts. May need to be more assertive in future. Thinking of posting in green ink. Do you think that will make a difference?

 

[2wheels]

I must be getting to be too subtle, quiet and discreet in my posts. May need to be more assertive in future. Thinking of posting in green ink. Do you think that will make a difference?

you can dip your nib in any colour you fancy.

 

[Speedstar]

Does anyone ever have the valve clearances checked nowadays ? Most manufacturers recommend it. Always something that was checked back in the day.

yes all new tractors are done at the 500 hour service

 

[Grassman]

yes all new tractors are done at the 500 hour service

Some not all

 

[Speedstar]

Some not all

was on about MF, Valtra & Fendt as they are all done at 500 hours , but JCB & cummins were not

 

[Grassman]

was on about MF, Valtra & Fendt as they are all done at 500 hours , but JCB & cummins were not

My tractor from agco wasn't done then. The mechanic said they rarely do them unless they feel a need to fiddle. I got mine checked at about 2000 hrs and didn't need altering

 

[Speedstar]

My tractor from agco wasn't done then. The mechanic said they rarely do them unless they feel a need to fiddle. I got mine checked at about 2000 hrs and didn't need altering

Be like any thing else , some dealership do and some do not