Teejet 844 spray controller issues

[radar]

Last time out sprayer worked perfectly, but tonight when out spraying beans for bean weevil, the 844 controller although set for 200lts , frequently shot up to 350lts +, then dived down to 130ish then came back to 200, and then all over again. Occasionally it would settle down then away again.
Am I correct in thinking it could be the flow meter - pump recently rebuilt and filters all clean?

 

[Farmer Bob]

Could be the flow meter, could also be the regulation factor in your settings. This is how quickly or slowly the sprayer corrects over and under dosing. If memory is correct the first number before the decimal point corrects the speed of large fluctuations, and after the point is smaller fluctuations. Think mine is set to 9.5 but would have to check. Small fluctuations need to be set to a lower number or it keeps hunting all the time. Hope that makes sense, would be worth a check.

 

[Hjwise]

Is your speed fluctuating? Loose wheel sensor?

 

[radar]

Is your speed fluctuating? Loose wheel sensor?

No - tested it against tractor down the road and reading the same and constant.

 

[Hjwise]

Adjusting the agitation valve sometimes helps, if not (as previous post says) try lowing the second number on the adjustment rate - I think it defaults to 9.5

 

[Jimmy 91]

@Farmer Bob did you manage to sort this out ? Having same problems with same controller after p and b did and nsts test

 

[Surgery]

Adjusting the agitation valve sometimes helps, if not (as previous post says) try lowing the second number on the adjustment rate - I think it defaults to 9.5

How do you do this? Just got a sprayer with this on and in auto it’s not putting on enough by10-20l a hec?