Accord DF1 fan compared to standard DA Fan

[Bax]

We need a front seed hopper to supply a rear mounted drill. Can I just convert a normal Accord hopper with a hydraulic fan to fit on the front or is a DF1 hopper fan bigger to give it a bit more puff to blow the seed to rear?

 

[Horn&corn]

Pretty sure they’re the same. Might restrict the highest seed rates. Ours way only hydraulic drive fan

 

[Alistair Nelson]

The old style DF1 is exactly the same as the DA Hopper fan etc just run the fan slightly faster 4500-4800 on the DF1 as opposed to 4300 DA. How wider toolbar are you looking to feed

 

[Bax]

The old style DF1 is exactly the same as the DA Hopper fan etc just run the fan slightly faster 4500-4800 on the DF1 as opposed to 4300 DA. How wider toolbar are you looking to feed

We are running a 4m toolbar. Will it blow beans ok in your experience?

 

[Alistair Nelson]

You should be fine at 4m as long as gearing correct in chain casing and you get 4500 -4800 rpm fan and no u’s in the transfer hose and coulter hose and most importantly don’t want to drill at crazy speeds.

 

[alomy75]

The old style DF1 is exactly the same as the DA Hopper fan etc just run the fan slightly faster 4500-4800 on the DF1 as opposed to 4300 DA. How wider toolbar are you looking to feed

Apologies for dragging this up Alistair but I’ve got my DF1 (new to me) on the tractor today and it’s driving a homemade 12 outlet tine drill. It’s got an rpm sensor and is saying 4000rpm which is only just enough air at the back. Above 4000 goes ‘into the red’ on the scale but I’d feel happier with a bit more air to the rear; is your 4500-4800rpm ‘safe’ to the fan etc?

 

[Alistair Nelson]

Yes completely safe what sort of RPM sensing system are you running obviously not Accord ESC. Your biggest killer with only 12 outlets will be back pressure you want some of those air exhausts that claydon / weaving use they are a readily available from either just to loose the air out the system if that makes sense

 

[alomy75]

Yes it makes perfect sense and I wondered the same; the rpm sensor is like nothing I’ve ever seen before; proper old school but it looks legit-sensor off the fan driving an ANALOGUE dial with a 12v feed off the battery! It’s just under 4000 at the mo and to be fair it works in the yard; but I’m used to a proper ‘blast’ of air on the sprinter with the same (metcalfe) coulters…which is 16 across 4m without diffusers on the coulters although there is a perforated section on the Horsch after the Venturi but before the splitter…I’ve also got some good looking but technically not ideal bends in my pipework-it goes inside and parallel to the track the other side-shame the outlet is out the top on a DF1

 

[Bob lincs]

Yes it makes perfect sense and I wondered the same; the rpm sensor is like nothing I’ve ever seen before; proper old school but it looks legit-sensor off the fan driving an ANALOGUE dial with a 12v feed off the battery! It’s just under 4000 at the mo and to be fair it works in the yard; but I’m used to a proper ‘blast’ of air on the sprinter with the same (metcalfe) coulters…which is 16 across 4m without diffusers on the coulters although there is a perforated section on the Horsch after the Venturi but before the splitter…I’ve also got some good looking but technically not ideal bends in my pipework-it goes inside and parallel to the track the other side-shame the outlet is out the top on a DF1View attachment 1173648

We need more details and pics of the rear end .

 

[Alistair Nelson]

Certainly your pipe routing is less than ideal

 

[alomy75]

Certainly your pipe routing is less than ideal

I know. But I thought it worth a try as the pipe can stay on all of the time if it works. If I were to do a more conventional horizontal pipe it would be significantly higher (currently exits under the rear mudguard) so exacerbating the rear ‘u’ where it goes down then up into the splitter. But I have created an extra ‘u’ at the front…

 

[alomy75]

We need more details and pics of the rear end .

Post in thread 'New Build Tine based Rear End for Front Tank Drill'
https://thefarmingforum.co.uk/index...-end-for-front-tank-drill.398629/post-9069905

 

[alomy75]

Yes completely safe what sort of RPM sensing system are you running obviously not Accord ESC. Your biggest killer with only 12 outlets will be back pressure you want some of those air exhausts that claydon / weaving use they are a readily available from either just to loose the air out the system if that makes sense

 

[Wombat]

I run my df1 at about 4200 with 12 outlets for drilling beans. I did fit weaving airbleads to both tool bars . Also means if you get a coulter blockage it’s easy to see as it blows seed out them

 

[Badshot]

I run my df2 flat out on the fan, it hasn't gone bang yet.
About 5500 from.memory.

Sounds like a jet up front.

 

[Sambo]

Are these hoppers ok for fertiliser? Looking at putting fertiliser onto our powerharrow mounted maize drill but would need to be through a front tank. As an aside what would be the best coulter for placement to 3 inches? Double disc, single disc? Thanks

 

[Alistair Nelson]

Yes just the job for fert allot get used for it but depending Fert your using and if you keep it clean and dry but may need to change to a Fert resistant metering device but they’re interchangeable with std

 

[fermerboy]

Are these hoppers ok for fertiliser? Looking at putting fertiliser onto our powerharrow mounted maize drill but would need to be through a front tank. As an aside what would be the best coulter for placement to 3 inches? Double disc, single disc? Thanks

Yes no problem.
About 3cwt/ac on a 3m combi is about the limit though, she's pretty well full open at that. If you need more you'd have to change the gears, but as said it will struggle to blow more at that sort of rates.
I run mine at 4200 -4500rpm and it's fine. Take off all the speed control crap at the hopper and use tractor spool to control the speed.
I have the return pipe plumbed through a oil cooler mounted on the hopper in the fans inlet flow so it both cools the oil and heats the air which helps in damp conditions. Mate did the same on his and the temp difference on his backend oil on a Valtra was amazing, can't remember but it took 20 or 30 degrees out of it.

 

[Sambo]

Yes no problem.
About 3cwt/ac on a 3m combi is about the limit though, she's pretty well full open at that. If you need more you'd have to change the gears, but as said it will struggle to blow more at that sort of rates.
I run mine at 4200 -4500rpm and it's fine. Take off all the speed control crap at the hopper and use tractor spool to control the speed.
I have the return pipe plumbed through a oil cooler mounted on the hopper in the fans inlet flow so it both cools the oil and heats the air which helps in damp conditions. Mate did the same on his and the temp difference on his backend oil on a Valtra was amazing, can't remember but it took 20 or 30 degrees out of it.

Thank you, some great advise. Will only be putting on 50kg/acre so will cope fine by all accounts. Run the maize drill fan on hydraulics too so an oil cooler sounds just the trick.