How did that thumb wheel switc you ordered work out? Was it a plug and play or were their complications? I’ve got a 257B2 and its thumb wheel switch is becoming hard to rotate and sticks.
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Cat 226b thumb wheel switch replacement
- Thread starter Shan Singh
- Start date
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- Tags
- 226b cat skid steer
Nige
Senior Member
It wouldn’t work. It’s somewhere in the thread. Start from Post #23 on Page 2.
The Cat switch requires an 8v supply and unfortunately the only switches on the open market all specify a 5v supply. Supplied with 5v they work great, supplied with 8v they don't.
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Hi, The right joystick thumb switch died on our 2007 257B2 this past month. I use a grapple attachment a lot. I had CAT mobile service in today for a look. For what it might be worth, his determination is that the ECM (part # 2160658) under the floor board is not working correctly. He said, "There is no output from pin 40 and pin 42 which is for A1 solenoid and no ouput for pin 58 and pin 42 which is A2 solenoid. This is directly from the ECM. The inputs are working as they can read using the laptop but nothing comes out of the ECM as 12 volts on pin 1 and 3."
So now I'm looking at whether or not to get a reman ECM or sell the machine as is.
So now I'm looking at whether or not to get a reman ECM or sell the machine as is.
Nige
Senior Member
No. See my post #122 just above.
I have the same issue with my switch 259b3 cat. I am wondering about contacting the manufacture you bought your switch from and having 100ish of them made with the right 8v and then perhaps selling them on an eBay store. ♂️ You guys are much more knowledgeable than me. Great feed. Thanks to all for the knowledge. Glad there are still guys out there fixing there equipment like me.
I wonder if they would sell 100 of them if i didn’t mention caterpillar. It would be worth reselling them on eBay to help you guys out. I need one.
Good idea.
pbd05
Well-Known Member
With the right item description, I think you'd have an easy time selling them. Hopefully the manufacturer will play ball.
Nige
Senior Member
For something that size you might have to be talking 10,000 pieces rather than 100 to make it worth their while.
You’re probably right and seem very knowledgeable. I have a cat 259b 2012 and need to install a 14 pin wiring harness on the machine I believe it was taken off previously. I can not find any information or videos of guys installing them. What’s the best place to get a wiring diagram? I ordered the conversion from skid steer genius to go to 8 pin but need to solve this issue first. New member so not sure if i should create a thread about this? Thanks.
Nige
Senior Member
You want an OEM electrical schematic for the machine, correct.? Serial Number identifies the appropriate schematic.
Nige
Senior Member
I'll send you the electrical schematic. Keep an eye on your messages.
Hey sir I sent you an email. I messed w new cut magnets and when it was oversized I got it to work… but after dremmel time and getting it to roll… I have nothing again. What magnets are you using? I got some rare earth bars from Amazon but as soon as they get small the polarity is off and no strength
How do you get the plastic cover off? Seems a couple torx bolts on the back side? Guessing patience and a t20 wrench
Hello all,
Thank you for all of your input.
I just bought a 2004, 236b and when I hooked up my grapple, no response from the aux. hydraulics.
1.Plenty of hydraulic oil.
2. Replaced the relays.
3. Disassembled the joystick and found the magnet destroyed.
4. I put a broken piece of a magnet between the small springs of the thumb wheel and it puts a load on the engine so I know the sensor is good.
Do I need a specific magnet power for the 8 volt continuity?
And should I be testing the ECM next?
Thank you for all of your input.
I just bought a 2004, 236b and when I hooked up my grapple, no response from the aux. hydraulics.
1.Plenty of hydraulic oil.
2. Replaced the relays.
3. Disassembled the joystick and found the magnet destroyed.
4. I put a broken piece of a magnet between the small springs of the thumb wheel and it puts a load on the engine so I know the sensor is good.
Do I need a specific magnet power for the 8 volt continuity?
And should I be testing the ECM next?
Nige
Senior Member
Go back over the previous 7 pages and you should find values for the output voltage from the thumbwheel roller switch (check that you have the 8v supply to the switch by back-probing) with it in the centre, rolled fully one way, and rolled fully the other way. That is the first step to testing the switch function. Do not go any further until you can get the switch output correct.
If you like you can put 12v on to each of the AUX solenoid valves one at a time (they are located on the main control valve - you will need the cab raised to do this) to check that the AUX function works in both directions when powered.
Sandcassell
Member
I did something a will never do again. I let my neighbor use my 257b and it ended up in his pond. The front was in far enough to have water run into the cab. Everything works but the auxiliary hydraulics. I pulled the ECM and the bottom of it was corroded enough to have eaten through he case. I opened it up and water ran out. Cat wants $6000 for a new one but I found one from China for $1000. They needed the serial number to program it so I'm hoping that it is okay. I had a tech from one of the local construction companies put his computer on it and it seems that the ECM is working. Could the water have shorted something and sent 12 volts to a sensor and burned it out? I've had the switch apart and it looks good.
Nige
Senior Member
If you go down the replacement ECM route DO NOT give the supplier the complete 17-character PIN from the plate, and especially not a photo. That is how PIN plates get cloned.
The machine Serial Number is the last 8 characters from the PIN. In your case I'm guessing SLKxxxxx. Just give the supplier that information.
From what you wrote above you have not conclusively established that the ECM is the root cause of the problem. If you pay $1000 for a replacement ECM and when you install it and the system still does not work, what then.? IMHO you need to do a LOT more troubleshooting before you condemn the ECM as being bad. Please start a new thread and give a Serial Number to get detailed assistance.