One for DB fans

John 1594 · Jan 22, 2017

Roy_H said:
Sealed clutch housing? That would be great fun if the crankshaft oil seal went and you didn't know about it until the housing was full of oil and the clutch started slipping .

Wouldnt have filled the housing as the oil would have been blown out of the outlet and into the engine, an even worse scenario

basically they were trying to use the flywheel as a pump to force more air into the engine

When you read some of the books writted about DB, some of the ideas they had were unbelievable. Testing the first DB aircraft tug with a torque converter gearbox for example

To test the stalling point of the hydrostat unit, a tractor was driven up to a 3ft high concrete bollard with the front wheel pressing the concrete. The torque converer had so much torque it rode the front wheel vertically up the bollard, before leaving the tractors front end wedged on top of it

they had to jack the tractor up to get it off, as the DB aircraft tugs were ballsted up to best part of 4 tonnes!!!

multi power · Jan 22, 2017

There is no doubt David browns were great engineers and had great ideas, but why oh why did everything they build have to be so awkward to use

Selectamatic · Jan 22, 2017

multi power said:
There is no doubt David browns were great engineers and had great ideas, but why oh why did everything they build have to be so awkward to use

See, perhaps it's just me, perhaps I am one of those special people who like to do things differently, but I cant think of many DB things that are genuinely awkward to use.

multi power · Jan 22, 2017

Selectamatic said:
See, perhaps it's just me, perhaps I am one of those special people who like to do things differently, but I cant think of many DB things that are genuinely awkward to use.

Top link for a start, no other top link will fit, all them gear levers on 90/94 series, just for a start

Thomas5060 · Jan 22, 2017

multi power said:
Top link for a start, no other top link will fit, all them gear levers on 90/94 series, just for a start

Left hand throttle as well, and they aren't as handy for hooking stuff on and off

Selectamatic · Jan 22, 2017

multi power said:
Top link for a start, no other top link will fit, all them gear levers on 90/94 series, just for a start

Ummmm... We regularly use Hydraulic Top Links on ours, with no modification other than a Cat 1 spacer slid into the ball. I also use a Ransomes collapsable top link occasionally on the 880, again, no mods.

There are three gear sticks on a Synchromesh 90 or 94 tractor, not a vast amount, yes, they don't run in sequence from LS1 to HN3 but that is not a bad thing, you can change up or down a few gears at a time, very quickly, by moving a single lever.

Admittedly the 90 series range change levers were poo, but these were modified in the 94 series, and do the job fine.

Selectamatic · Jan 22, 2017

Thomas5060 said:
Left hand throttle as well, and they aren't as handy for hooking stuff on and off

Left hand throttle, in the days before foot throttles were commonplace was fine, left hand for steering and throttle as you turn over your right shoulder watching a baler, plough, mower etc, right hand on the hydraulic lever.

Cant comment as to how handy they are/are not to hitch stuff on and off, don't seem to be any better or worse than their peers...?

multi power · Jan 22, 2017

Selectamatic said:
Ummmm... We regularly use Hydraulic Top Links on ours, with no modification other than a Cat 1 spacer slid into the ball. I also use a Ransomes collapsable top link occasionally on the 880, again, no mods.

There are three gear sticks on a Synchromesh 90 or 94 tractor, not a vast amount, yes, they don't run in sequence from LS1 to HN3 but that is not a bad thing, you can change up or down a few gears at a time, very quickly, by moving a single lever.

Admittedly the 90 series range change levers were poo, but these were modified in the 94 series, and do the job fine.

In the 27 years we have had the 1394 neither dad nor me have worked out what the next gear up or down is , every top link on the farm has had the side ground off the ball to make them fit

Thomas5060 · Jan 22, 2017

Selectamatic said:
Left hand throttle, in the days before foot throttles were commonplace was fine, left hand for steering and throttle as you turn over your right shoulder watching a baler, plough, mower etc, right hand on the hydraulic lever.

Cant comment as to how handy they are/are not to hitch stuff on and off, don't seem to be any better or worse than their peers...?

If your turning with a baler etc on why are you letting the revs off with you steer? And if your mowing you keep the revs on and lift up out as your driving, no need to change the revs.
Well we have mostly been Ford/Fordson/Massey and found anytime we had a brown or inter that they weren't as easy to hook stuff on and off and that shafts had to be changed so they would fit.

Selectamatic · Jan 22, 2017

multi power said:
In the 27 years we have had the 1394 neither dad nor me have worked out what the next gear up or down is , every top link on the farm has had the side ground off the ball to make them fit

Really?! After 27 years?!

LS1, LS2, HS1, L1, LS3. HS2, L2, H1, HS3, L3, H2, H3

OK, that might look confusing, but it's not, it's just overlap. it's a very handy feature for many many applications.

If It's that confusing, get yourself a little chart like this one...

So you have plenty of Top Links that fit now then?! No problem!

Drillman · Jan 22, 2017

multi power said:
In the 27 years we have had the 1394 neither dad nor me have worked out what the next gear up or down is , every top link on the farm has had the side ground off the ball to make them fit

Gear selection on the synchro ones is an abysmal layout. trying to get the next gear up or down when working land or pulling a heavy load uphill often meant multi lever moving.

As for the hydraulics well they worked ok but the switching lever at the back is very easily broken if used incorrectly. And it isn't obvious how to operate either.

Selectamatic · Jan 22, 2017

Thomas5060 said:
If your turning with a baler etc on why are you letting the revs off with you steer? And if your mowing you keep the revs on and lift up out as your driving, no need to change the revs.
Well we have mostly been Ford/Fordson/Massey and found anytime we had a brown or inter that they weren't as easy to hook stuff on and off and that shafts had to be changed so they would fit.

If you bale with a David Brown, you can cut down on noise and fuel by turning the baler on 1000rpm, with the engine at 1100 rpm. If you turn downhill with an empty baler, the tractor rev's could lift a little, but because your in 1000 PTO, thats too much for your baler, so it's quite nice to be able to cut down the revs without moving your left hand off the steering wheel.

Mowing may be a poor example, but what about ploughing, cultivating, or really, anything that needs adjustment of engine RPM while your keeping an eye on what's going on behind you and/or the hydraulics.

DB PTO dimensions in relation to the drawbar were correct to the British Standard, therefore what should be Industry Standard of the day, perhaps it was the others that were incorrect?

Drillman · Jan 22, 2017

Selectamatic said:
If you bale with a David Brown, you can cut down on noise and fuel by turning the baler on 1000rpm, with the engine at 1100 rpm. If you turn downhill with an empty baler, the tractor rev's could lift a little, but because your in 1000 PTO, thats too much for your baler, so it's quite nice to be able to cut down the revs without moving your left hand off the steering wheel.

Mowing may be a poor example, but what about ploughing, cultivating, or really, anything that needs adjustment of engine RPM while your keeping an eye on what's going on behind you and/or the hydraulics.

DB PTO dimensions in relation to the drawbar were correct to the British Standard, therefore what should be Industry Standard of the day, perhaps it was the others that were incorrect?

That all depends on the baler your using. Wouldn't want to try pull mine in 1000pto with a broon.

multi power · Jan 22, 2017

Selectamatic said:
Really?! After 27 years?!

LS1, LS2, HS1, L1, LS3. HS2, L2, H1, HS3, L3, H2, H3

OK, that might look confusing, but it's not, it's just overlap. it's a very handy feature for many many applications.

If It's that confusing, get yourself a little chart like this one...

View attachment 459480

So you have plenty of Top Links that fit now then?! No problem!

Well if I knew the difference between high slow and low slow maybe the chart could help

Selectamatic · Jan 22, 2017

Drillman said:
Gear selection on the synchro ones is an abysmal layout. trying to get the next gear up or down when working land or pulling a heavy load uphill often meant multi lever moving.

As for the hydraulics well they worked ok but the switching lever at the back is very easily broken if used incorrectly. And it isn't obvious how to operate either.

But very often it did not...

When pulling a trailer, set off in H1, which is 9th, then by moving the lever one place, jump up to 11th by going to H2 then top, H3, back to H2 if needed.

When working land ok, HS2 for example may be too slow, so move 2 gear levers to get L2, but the likelihood is that you would stay in Low range from then on.

Many things are easily broken if used incorrectly. Read the book or ask someone who knows before using excessive force to move things, that apples to many things, surely, not just DB hydraulics?

Selectamatic · Jan 22, 2017

Drillman said:
That all depends on the baler your using. Wouldn't want to try pull mine in 1000pto with a broon.

Conventional balers, never baled a bale in 540 with a DB, makes the whole job a quieter and more plesent job all round.

Thomas5060 · Jan 22, 2017

Selectamatic said:
If you bale with a David Brown, you can cut down on noise and fuel by turning the baler on 1000rpm, with the engine at 1100 rpm. If you turn downhill with an empty baler, the tractor rev's could lift a little, but because your in 1000 PTO, thats too much for your baler, so it's quite nice to be able to cut down the revs without moving your left hand off the steering wheel.

Mowing may be a poor example, but what about ploughing, cultivating, or really, anything that needs adjustment of engine RPM while your keeping an eye on what's going on behind you and/or the hydraulics.

DB PTO dimensions in relation to the drawbar were correct to the British Standard, therefore what should be Industry Standard of the day, perhaps it was the others that were incorrect?

But if your baling you don't need your right for anything else unless you have a sleigh on the back which you need to release when full.
Have watch granda plough manys a time with Massey's and never seen him struggling to let revs off. Any time I've been discing or grubbing etc I just get my gear and revs right and don't hardly need to adjust the revs. Plus the left hand throttle isn't really that easy to use whilst steering, found I either have to let go of steering well or else reach across with my right hand.
If the left hand throttle was so good DB would have kept it

Selectamatic · Jan 22, 2017

multi power said:
Well if I knew the difference between high slow and low slow maybe the chart could help

On your 94 Series the range lever closest to the door is the Slow/Normal lever, it effectively reduces your 'Normal' gear ratios.

Selectamatic · Jan 22, 2017

Thomas5060 said:
But if your baling you don't need your right for anything else unless you have a sleigh on the back which you need to release when full.
Have watch granda plough manys a time with Massey's and never seen him struggling to let revs off. Any time I've been discing or grubbing etc I just get my gear and revs right and don't hardly need to adjust the revs. Plus the left hand throttle isn't really that easy to use whilst steering, found I either have to let go of steering well or else reach across with my right hand.
If the left hand throttle was so good DB would have kept it

No, you dont, but when you are turned in your seat watching the crop going into the baler, your right hand is furthest from the dash, where your left hand is on the steering wheel, usually on the LH side of the steering wheel.

They did keep it, until the foot throttle became a standard feature, so you could do with your foot what your left hand used to do.

Anyway, who gives a monkeys about where the go faster stick was, it's tea time for me!

Thomas5060 · Jan 22, 2017

Selectamatic said:
No, you dont, but when you are turned in your seat watching the crop going into the baler, your right hand is furthest from the dash, where your left hand is on the steering wheel, usually on the LH side of the steering wheel.

They did keep it, until the foot throttle became a standard feature, so you could do with your foot what your left hand used to do.

Anyway, who gives a monkeys about where the go faster stick was, it's tea time for me!

Yes tea time is more important

One for DB fans

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