What Does This Button Do???

[8934]

The mystery deepens.

My wife has spoken to the factory twice, she called them yesterday, and they called her back today to get the VIN number of the machine. They do not know what the button is suppsed to do either.

They are supposed to call Japan to ask them... Go figure!

 

[kthompson]

I purchased a used Volvo just over a year ago. There is a high speed button on my blade lever they did not have in the manual. It was in a totally different series of serial numbers than mine. It was sold by Volvo to me and they had the number when they ordered the manuals.

The best I can tell, it looks like a horn being shown, if so my guess the alarm for the machine when moving it. Not sure it sounds in all directions or only in reverse. If not other thoughts: Is it by chance a high low speed shift? But again the best I can tell the decal does not look like that. Or is there a horn you can switch off and there is a button on one of your joy sticks to operate it? Look for a thumb location. Lights, does your machine have a quick disconnect for the bucket?

 

[kthompson]

It will not be funny if for an option your machine does not have but they use the same board due to cost effectiveness, but they may.

Is asking the previous owner not an option?

 

[PILOON]

Just guessing here,

The area defined in white outline has 2 functions depicted.
The right one looks to be lighting (boom work light?) and I suspect the left since there is a boom arm symbol above suggests a remote boom arm locking pin (either swing or tuck in) probably to lock for transport.
Also adjacent to green light looks to be a little grill suggesting that a beeper warning may be housed behind.

I seem to recall my buddy telling me of that feature on his new Deere backhoe.
Would make sense that the operator would not need to dismount and pin every time he moved the machine around a work site.

If so, perhaps the complete option was not installed or the previous owner disabled it.

Also to the right of the outlined zone is a switch that the symbol suggests 'beeper bypass'. (would make sense that you would not wish to have beeping all the while that you move around a work site or working at night (light on) with an annoying beeping.

 

[8934]

Update

Thanks for the help, and guesses.

Beep silence is on a old fashoned toggle switch, so it isnt that.

I have taken apart the dash and traced all the wires I can. The light switch when pressed toggles a small relay in the dash. There was a duplicate relay right next to it....

I assumed it was for the mystery switch, but found out that it works the horn. (Anouther switch in lever)

Since switch is not large enough to power anything directly, I have about decided that it is supposed to be for automatic idle function, when hydraulics do not see a load. But machine does not have the function. A few people on anouther board says their machines are the same, have switch but no function.

Without wiring diagram this is about as far as I can go.

 

[mjncad]

My guess it was cheaper to install the switch on all machines whether it controlled anything or not; rather than make separate assemblies, etc for machines with the switch controlled mystery function and for machines that didn't have the function.

 

[8934]

Is asking the previous owner not an option?

Sorry I missed your question, I purchased it with 80 hours from the local JD dealership, it was placed in their rental fleet in 2008 right before the bottom fell out of the construciton market.

My dealership, part of a chain got it for me from their other store, and they dont know what button does either.