Teejet 844e controller with teejet section control gps , rate control issue

Jimmy 91

Member

• Nov 20, 2022

• #1

Hi we have a clayton sprayer with Knight sprayer on, teejet 844e controller with teejet section control gps .

Issue I'm having is it won't spray in auto , it always puts too much on ie target rate set to 150 and it struggles to get down to 175 , fluctuates alot , tried different speeds different rates etc and still is no better , was in perfect working order when it was traded into a dealer , they put a nsts test on it and messed with something and I can't get it right now .
If you try it in manual soon as you turn it on you can manually set it to 3 bar and spray at a set speed no bother , but if you try it in auto , then back in manual you can up the pressure but not drop the pressure , you have to turn box on and off for it to work in manual again

Any advice appreciated

 

GrantMo

Member

Mixed Farmer

Location

Moray

• Nov 20, 2022

• #2

There is a setting in that box for a minimum pressure which means it won’t regulate below whatever you have that set for, say 1.5 bar, the idea is that it gets up to pressure faster for spraying out of corners etc. We had a similar issue where that setting ended up at 3 bar or something silly so it wouldn’t regulate down to the rate we were looking for. Maybe worth a check?

 

Timbo1080

Member

Location

Somerset

• Nov 20, 2022

• #3

Air down solenoid sticking?

 

Jimmy 91

Member

• Nov 20, 2022

• #4

GrantMo said:

There is a setting in that box for a minimum pressure which means it won’t regulate below whatever you have that set for, say 1.5 bar, the idea is that it gets up to pressure faster for spraying out of corners etc. We had a similar issue where that setting ended up at 3 bar or something silly so it wouldn’t regulate down to the rate we were looking for. Maybe worth a check?

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I'll have a look at that setting ita frustrating as it was perfect before . When they was testing it it took them ages as they struggled to get pressure up so they messed about with box when it only needed ramsy valve blowing up

 

Jimmy 91

Member

• Nov 20, 2022

• #5

Timbo1080 said:

Air down solenoid sticking?

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Seems to work fine in manual until you run it in auto

 

H

homefarm

Member

Location

N.West

• Nov 20, 2022

• #6

We had trouble like this. It was the tiny o rings in the valve block swelling and sticking. Did it have any Univoq though it?

 

Jimmy 91

Member

• Nov 20, 2022

• #7

Unsure what it's had through it , iv had alot of stuff through it and its still the same

 

rs1

Member

Arable Farmer

Location

Oxfordshire

• Nov 20, 2022

• #8

its well worth running through the programming sequence, check everything is set correctly,it’s quite easy to change a setting when you’re changing the wheel size.

 

Jimmy 91

Member

• Nov 20, 2022

• #9

Not the beat computer to use I noticed , it helps if you know what everything needs to be set at anyone have rough settings please

 

Flat 10

Member

Arable Farmer

Location

Fen Edge

• Nov 21, 2022

• #10

Tell the company that messed it up to send someone who knows what they are doing to fix it?!?!

 

Jimmy 91

Member

• Nov 21, 2022

• #11

Tried that , all I got was bought as seen, and there fitters don't know what they've done , thought I'd try on here to see if anyone knows to try save a few hundred pounds as it must only be something simple

 

S

small dwarf

Member

Location

Pettinain

• Nov 21, 2022

• #12

Change the flow meter, it'll be somewhere after the pump. A bit of debris can damage it.

 

O

Oliveau

Member

Location

Indre et Loire, France

• Nov 21, 2022

• #13

Will this help:

https://www.teejet.com/-/media/dam/agricultural/usa/sales-material/technical-manual/98-70006_844e_sprayer_control_usermanual_enus.pdf

Might be a problem with the pressure sensor ?

 

rs1

Member

Arable Farmer

Location

Oxfordshire

• Nov 21, 2022

• #14

Jimmy 91 said:

Not the beat computer to use I noticed , it helps if you know what everything needs to be set at anyone have rough settings please

Click to expand...

Do you have a manual?

 

O

Oliveau

Member

Location

Indre et Loire, France

• Nov 21, 2022

• #15

rs1 said:

Do you have a manual?

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Yes, he does; I posted the link one post back.

 

Jimmy 91

Member

• Nov 21, 2022

• #16

Thanks for the advice and manual, I will see if I can make some sense of it

 

rs1

Member

Arable Farmer

Location

Oxfordshire

• Nov 21, 2022

• #17

Jimmy 91 said:

Thanks for the advice and manual, I will see if I can make some sense of it

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Have you programmed it before? They’re good and usually very accurate

 

Jimmy 91

Member

• Nov 22, 2022

• #18

No I haven't programmed it before , got it mid drilling and couldn't get it to work in auto so just sprayed in manual to get sprayed up then been busy with other stuff since , I need to spend a day on it and get my head round it . wanting the auto working more for liquid fert in the spring so I can easily adjust rates ,

 

Will Blackburn

Member

Location

Cheshire

• Nov 22, 2022

• #19

GrantMo said:

There is a setting in that box for a minimum pressure which means it won’t regulate below whatever you have that set for, say 1.5 bar, the idea is that it gets up to pressure faster for spraying out of corners etc. We had a similar issue where that setting ended up at 3 bar or something silly so it wouldn’t regulate down to the rate we were looking for. Maybe worth a check?

Click to expand...

So how do you do that, think my minimum is 1.1 bar, could do with raising it as some of the anti drip start working and stall some nozzles?

 

rs1

Member

Arable Farmer

Location

Oxfordshire

• Nov 22, 2022

• #20

Will Blackburn said:

So how do you do that, think my minimum is 1.1 bar, could do with raising it as some of the anti drip start working and stall some nozzles?

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Run through the programming sequence, the manual should tell you how