226b continous flow

[quiksilvr]

thanx, i will look into this and let you know

 

[quiksilvr]

the attached didnt help much. however, a question came to mind, in regards to the coil that holds the right joystick in the forward position. i believe its for float control. if that coil isnt connected, could it prevent continuous flow from working? work tool detent coil is what its called

 

[Nige]

the attached didnt help much. however, a question came to mind, in regards to the coil that holds the right joystick in the forward position. i believe its for float control. if that coil isnt connected, could it prevent continuous flow from working? work tool detent coil is what its called

Not AFAIK.

 

[Cmark]

the attached didnt help much. however, a question came to mind, in regards to the coil that holds the right joystick in the forward position. i believe its for float control. if that coil isnt connected, could it prevent continuous flow from working? work tool detent coil is what its called

That's interesting. I thought the float coil was tied in with the interlock circuit. If it isn't connected then AFAIK, none of the hydraulics should work and you should have a flashing light on the console.

 

[Nige]

That's interesting. I thought the float coil was tied in with the interlock circuit. If it isn't connected then AFAIK, none of the hydraulics should work and you should have a flashing light on the console.

From the electrical schematic the implement pilot solenoid and the float solenoid are wired in parallel (via wires P988-OR & 975-WH) to the Interlock ECM. So if the pilot solenoid is powered up and working, as proved by the fact that the implement lift/tilt functions work, what negative effect on the AUX/CONT FLOW functions could the float detent solenoid not working possibly have.?

 

[quiksilvr]

when the work tool detent coil went bad, i had flashing lights on console and the machine wouldnt move. but as soon as i unplugged it, the flashing lights turned off and machine functions just fine

 

[Nige]

when the work tool detent coil went bad, i had flashing lights on console and the machine wouldnt move. but as soon as i unplugged it, the flashing lights turned off and machine functions just fine

Probably because it was shorting out the pilot solenoid and creating a Diagnostic Code. Disconnecting it resumed "normal service" as far as the Interlock ECM is concerned. Check it out on the electrical schematic.

 

[quiksilvr]

yea you're right about that.... so i decided to remove the ecm and open it up. i figured if im gonna need a new one, i might as well have a look inside. i see 2 rows of transistors, one row on each end of the board. im gonna get the data sheets for them right now and test them with my DMM. im guessing one of them is connected to the cont. flow circuit. Ill post my findings, hopefully its just one of them that have gone bad.

 

[Nige]

I'm not 100% sure about your logic. You know that whichever component (transistor?) on the board that activates the solenoid for the AUX function is working when you roll the thumbwheel. As I see it the only difference between AUX and CONT functions is the input from the pushbutton that, combined with the thumbwheel input, causes the software programming in the ECM to activate the AUX solenoid permanently instead of in a momentary fashion as it does so long as you keep the thumbwheel held over.

 

[quiksilvr]

yea you're probably right, but i figure its worth a shot.

 

[Nige]

yea you're probably right, but i figure its worth a shot.

I agree it is worth a shot. I was attempting to illustrate how I saw the logic of the ECM worked in an attempt to help you understand what was going on. ECMs are a black hole as far as I'm concerned, they either work or they don't.

 

[quiksilvr]

yea i know what ya mean. for me they are just a bunch of components soldered to a board, so they can be unsolderd and tested lol

 

[Nige]

yea i know what ya mean. for me they are just a bunch of components soldered to a board, so they can be unsoldered and tested lol

Should be a processor somewhere. That would be my #1 suspect.

 

[quiksilvr]

well i managed to get my cat et software working again and connected to the ecm. i ran a "wiggle" test on the aux. hyd. system. its shows the status of all the controls and switches.it shows cont. flow switch status (open/closed) and cont. flow system status (on/off). something interesting i noticed is that with the engine running, sitting in seat, Lapbar down and park brake switch OFF, when i press the thumbwheel and the cont. flow switch, the switch status changes as it should (open to closed). but the cont flow system status doesnt change from OFF to ON. HOWEVER, if i set the park brake so the switch is ON and i press the thumbwheel and cont. flow switch, the cont. flow system status temporarily changed from OFF to ON. So its turns on but doesnt stay on....?

 

[quiksilvr]

well i was mistaken about the cont. flow status not changing to ON when the parking brake wasnt set. but the underlying issue remains. the cont. flow turns on but wont stay on no matter what button combination i try.

 

[Nige]

I can't see it being anything other than a missing signal output from the processor side of the ECM to the appropriate solenoid depending in which direction you want the AUX flow to travel.

 

[Nige]

Check this out. These guys might be able to help you with the ECM - Link

 

[quiksilvr]

thanx

 

[quiksilvr]

Check this out. These guys might be able to help you with the ECM - Link

PROBLEM SOLVED! it came to me last night while i was laying in bed. So apparently the thumbwheel switch wasnt returning to 0% at center. when at center it was at like - 24%. so i opened the switch and manipulated the springs and got it to return to 0% at center. now cont. flow works. thank you nige for all your wisdom and assistance. its much appreciated

 

[Nige]

Excellent that you cracked it but……
Do you think that the switch signal has been “off centre” ever since you got the machine.? I know you fixed it once by replacing the magnet.