226b 4 in 1 bucket does not open or close

[Nige]

probed green 996 the thumb roll in the centre reading 4.134v up the reading 1.880v down the reading 6.37

The voltage measurements are certainly in the right ball park. Are those readings repeatable (say +/-0.05v) no matter how many times you roll the thumbwheel or return it to the centre.?

If they are then hook your old joystick handle to the same electrical connection and do the same test. Post back with your results.

 

[Roby G]

I can only test the old plug in the centre i have a magnet I used before the new joy stick that might work.Yes the readings were the very similar every time I moved the thumb reel . Do you know or have a pic where the solenoids are situated can I check the plugs on the solenoids it might be the problem .
Cheers Rob

 

[Nige]

Do you know or have a pic where the solenoids are situated can I check the plugs on the solenoids it might be the problem .

Before you go to that end you are going to have to visit the ECM and ensure that the exact same voltages you measured at the connector next to the joystick are actually arriving at the ECM. For that you will need an electrical schematic. Do you have one.?

 

[Roby G]

I think I do I need to find it but I don't even know where the ECM is located the service manual has very little in diagrams. How big is the ECM like mobile phone size bigger or smaller ??

 

[Nige]

See this thread, Posts #6 & 7.
You’ll need to remove the seat first.
It’s quite likely that your ECMs will be in a similar state.

Cat 247B Aux Hydraulics Intermittent

Working on my 247B Serial:MTL03866 It came to me from a equipment grave yard and has been quite a process to get into reliable shape, but I am getting there. Recently I ended up with a operators manual and realized that the "Auxiliary Override" light that has been on constant in my machine is...

www.heavyequipmentforums.com

 

[Roby G]

I think I do I need to find it but I don't even know where the ECM is located the service manual has very little in diagrams. How big is the ECM like mobile phone size bigger or smaller

See this thread, Posts #6 & 7.
You’ll need to remove the seat first.
It’s quite likely that your ECMs will be in a similar state.

Cat 247B Aux Hydraulics Intermittent

Working on my 247B Serial:MTL03866 It came to me from a equipment grave yard and has been quite a process to get into reliable shape, but I am getting there. Recently I ended up with a operators manual and realized that the "Auxiliary Override" light that has been on constant in my machine is...

www.heavyequipmentforums.com

 

[Roby G]

Ok I'll get to it today looks like I need to lift the cab I'll test the old switch first the hydraulics have been leaking a long time before I bought the machine I'll need to clean the area in the hydraulics as well by the look of the post you sent me
Keep you posted

 

[Nige]

Your wiring layout and ECM location is slightly different to the thread I linked. See attachment. The AUX Implement ECM that receives the signals from the joysticks is #20.

 

[Roby G]

 

[Roby G]

That was the old plug operated with a magnet

 

[Roby G]

That was the old plug operated with a mag

 

[Roby G]

 

[Roby G]

Belly plate was missing I had to dig the ECM out of another of build up

 

[Roby G]

By the diagram I think I've cleaned the correct 1

 

[Nige]

View attachment 311921View attachment 311922View attachment 311923

Based on those numbers there wasn’t a lot wrong with the former thumbwheel roller switch.

 

[Roby G]

No but I had to use a magnet just frustrating

 

[Roby G]

 

[Roby G]

This is the only schematic that I have do I need to follow the harness to the ECM & check the wiring at the ECM

 

[Roby G]

 

[Roby G]

This is what they give you in the service manual