Massey 390

[GAM]

Hi, I’m trying to find a speed chart for a 390, and I can’t seem to find how many revs needed to operate the pto at 540

 

[wdah/him]

most 300 series massey had it on the dash or newer ones it was on the back of the sunvisor, what year is it and gearbox, would be the important info

 

[GAM]

most 300 series massey had it on the dash or newer ones it was on the back of the sunvisor, what year is it and gearbox, would be the important info

It’s 1995 12 speed forward/reverse shuttle

 

[wdah/him]

from memory, i think it is about 1900rpm for 540 but could have been 1800 with 1900 being 1000. long time from we had a 399 12/12shuttle and current 399 and 390 here are different gearbox and no change over leaver for pto in the cab(both are 1991, our other 399 was a late 1991 with 1000series engine and shuttle box) have a 540 pto at 1900 revs ish,

normally for us if its mowing etc we just go flat out 2200rev, for high demanding jobs so when things get tough there is a little to die but still have machine at best operating speed if that makes sense

 

[Bury the Trash]

For an accurate measurement.

...not cheap I agree but it will come in useful over a longer period of time ime.

Sealey TA050 Digital Tachometer Contact/non-contact

Sealey - TA050 - Sealey TA050 Digital Tachometer Contact/non-contact - <p>Professional quality laser instrument for fast and accurate measurement of rotational

www.rapidonline.com

 

[TheTallGuy]

For an accurate measurement.

...not cheap I agree, but it will come in useful over a longer period of time ime.

Sealey TA050 Digital Tachometer Contact/non-contact

Sealey - TA050 - Sealey TA050 Digital Tachometer Contact/non-contact - <p>Professional quality laser instrument for fast and accurate measurement of rotational

www.rapidonline.com

Or somewhat cheaper... https://www.amazon.co.uk/Digital-Ta...jbGlja1JlZGlyZWN0JmRvTm90TG9nQ2xpY2s9dHJ1ZQ==

 

[wdah/him]

12/12 i thnk came in 30km and 40km box
nearly cetain that it should be on the back of the sunvisor if still stuck there

 

[Bury the Trash]

Or somewhat cheaper... https://www.amazon.co.uk/Digital-Ta...jbGlja1JlZGlyZWN0JmRvTm90TG9nQ2xpY2s9dHJ1ZQ==

Yes, I was thinking there might be a cheaper one somewhere and I guess they all come from China originally .
The point is they should in theory as long as used carefully give a more accurate figure than....

Even my most modern ' electronic' tractor is out by 10 or rpm or so on the pto according to my sealey tacho......

It can make a difference to some implements...

 

[oakleaf]

It’s 1975 12 speed forward/reverse shuttle

A typo perhaps?
They werent about in 1975.

 

[TheTallGuy]

Yes, I was thinking there might be a cheaper one somewhere and I guess they all come from China originally .
The point is they should in theory as long as used carefully give a more accurate figure than....

Even my most modern ' electronic' tractor is out by 10 or rpm or so on the pto according to my sealey tacho......

It can make a difference to some implements...

I've had a couple of cheap ones off Amazon & they've tallied fairly close to calibrated units.

 

[Dry Rot]

Anyone know how to adjust the tacho on a 390?

Many cheap multi meters have a tachometer function.

There are MF 300 travel speed charts in the MF Operator Manual, Publication No 1865 706 M1 Agco. Worth having anyway.

 

[GAM]

A typo perhaps?
They werent about in 1975.

TYPO ERROR, its an age thing! 1995..

 

[GAM]

Yes, I was thinking there might be a cheaper one somewhere and I guess they all come from China originally .
The point is they should in theory as long as used carefully give a more accurate figure than....

Even my most modern ' electronic' tractor is out by 10 or rpm or so on the pto according to my sealey tacho......

It can make a difference to some implements...

Bury The Trash, if its only 10 rpm out, how do you know if the Sealey unit is 100% accurate? Im not being pedantic, its that you have mentioned Modern Electronic tractors, I would have thought that their onboard computers would be able to adjust the pro shaft accordingly? Surely there is a certain amount of discrepancy on both sides, not just the tractor!

All I am trying to do is exactly what you have mentioned in your post, I am trying to get the best performance out of our new MF1840 baler, and not knowing what the exact rpm is to drive the pto at 540 on the 390 is the reason for my post..

 

[oakleaf]

Bury The Trash, if its only 10 rpm out, how do you know if the Sealey unit is 100% accurate? Im not being pedantic, its that you have mentioned Modern Electronic tractors, I would have thought that their onboard computers would be able to adjust the pro shaft accordingly? Surely there is a certain amount of discrepancy on both sides, not just the tractor!

All I am trying to do is exactly what you have mentioned in your post, I am trying to get the best performance out of our new MF1840 baler, and not knowing what the exact rpm is to drive the pto at 540 on the 390 is the reason for my post..

Admitedly l know zero about MF 1840 balers but l thought generally small square balers were set on ram strokes/min so exact pto speed would be irrelevant?
All you need is a stopwatch.

 

[GAM]

Admitedly l know zero about MF 1840 balers but l thought generally small square balers were set on ram strokes/min so exact pto speed would be irrelevant?
All you need is a stopwatch.

Absolutely right, thats how we use to set the Jones baler up! the inline baler is different and I really haven't quite got it sorted yet...

 

[oakleaf]

Absolutely right, thats how we use to set the Jones baler up! the inline baler is different and I really haven't quite got it sorted yet...

Ah ok.
Sorry l am of no help to you so.
My 575 puts out 540 @1700 rpm but l have an idea the 300's were a bit higher , possibly 1900 or 2000.
They were popular models so you'd think there must be someone on here who has one with a sticker still readable.

 

[TheTallGuy]

Bury The Trash, if its only 10 rpm out, how do you know if the Sealey unit is 100% accurate? Im not being pedantic, its that you have mentioned Modern Electronic tractors, I would have thought that their onboard computers would be able to adjust the pro shaft accordingly? Surely there is a certain amount of discrepancy on both sides, not just the tractor!

All I am trying to do is exactly what you have mentioned in your post, I am trying to get the best performance out of our new MF1840 baler, and not knowing what the exact rpm is to drive the pto at 540 on the 390 is the reason for my post..

There are many things that will affect what speed is seen. For instance if you are using the contact mode with those tachos then you don't necessarily get a reliable contact & that can cause over and under counting - especially when there's vibration. There will be tolerances for how accurate the tractor tacho is, plus the chances are that the gearing will not result in a nice easy number for engine revs, so the manufacturer rounds it to a convenient number - for instance a simple 3:1 ratio would give 1620 rpm so would most likely be listed as 1600 rpm

 

[Bury the Trash]

Bury The Trash, if its only 10 rpm out, how do you know if the Sealey unit is 100% accurate? Im not being pedantic, its that you have mentioned Modern Electronic tractors, I would have thought that their onboard computers would be able to adjust the pro shaft accordingly? Surely there is a certain amount of discrepancy on both sides, not just the tractor!

All I am trying to do is exactly what you have mentioned in your post, I am trying to get the best performance out of our new MF1840 baler, and not knowing what the exact rpm is to drive the pto at 540 on the 390 is the reason for my post..

100 Ram strokes a minute .

i might be wrong as I'm not @Mursal ........ i dont have as much knowledge ......or patience

 

[Dry Rot]

Is this what you want?

 

[Bury the Trash]

i would try a smidgin over 2000engine rpm and count the ram strokes a starting point ..........

they wont have to be spot on 100 ... 1 or 2 either side will be tolerated i expect...
yer phones got a good stop watch.....' its a different world '

Happy days.