I have a 2000 model 763 and one day seat bar will light up and can use it to work and next day no light. I replaced all parts of seat bar switch and it has not helped. Would appreciate any suggestions on what to look for before I have to carry to Bobcat dealer and sit for two weeks before they even look at it. I hate all this safety stuff they have on here now. Any help would be greatly appreciated..
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bobbie-g
Well-known member
- Joined
- Mar 15, 2004
- Messages
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What model of 763? Does it have a panel at upper left with the seat bar light, or is there a BICS panel behind the operator's right elbow where the seat bar LED is located? The seat bar (aka lap bar, aka carnival bar) has a switch at the left side pivot point (in my very limited experience). It's a Hall-effect switch, which uses a rotating magnet near an enclosed solid-state switch (electronic, no moving parts, mounted to the ROPS cage). As the bar is lowered, the magnet rotates into the correct position to actuate the switch. So you can detach them from the bar and play with the two pieces while watching the light, assuming the wiring is intact. There are a couple of nibs protruding from one of the pieces that fit into a slot in the frame so the magnet and switch are aligned properly. That's worth checking also. 
---Bobbie-G
---Bobbie-GYes it has the seat bar light on upper left panel. I replaced all the parts of the switch. But have not tried moving switch not mounted. Also to show my ignorance on this what is the small piece of metal for that comes with a new switch for and is that maybe my problem.?What model of 763? Does it have a panel at upper left with the seat bar light, or is there a BICS panel behind the operator's right elbow where the seat bar LED is located? The seat bar (aka lap bar, aka carnival bar) has a switch at the left side pivot point (in my very limited experience). It's a Hall-effect switch, which uses a rotating magnet near an enclosed solid-state switch (electronic, no moving parts, mounted to the ROPS cage). As the bar is lowered, the magnet rotates into the correct position to actuate the switch. So you can detach them from the bar and play with the two pieces while watching the light, assuming the wiring is intact. There are a couple of nibs protruding from one of the pieces that fit into a slot in the frame so the magnet and switch are aligned properly. That's worth checking also.
bobbie-g
Well-known member
- Joined
- Mar 15, 2004
- Messages
- 577
Playing with the switch unmounted will show you immediately if it's working. It is not orientation sensitive (up, down, sideways doesn't matter). The only thing that counts with that switch (assuming wiring and display panel OK) is the interaction between the magnet (on the lapbar, so it rotates) and the sensor (mounted solid to the ROPS frame). And I don't know what the extra piece of metal might be. I just disassembled carnival bars on a 751 and a 763 and swapped them. The sensors stayed put, and the magnets came off with the bars as I recall. And as I said, I think there were a couple of protrusions either side of a mounting bolt on something. The protrusions fit in a slot to provide the alignment between the magnet and the sensor. And when you get that exercise down pat, the same technology is used in the seat switch on many older machines, although if you have a G model I don't think it has a seat switch. Some folks, me included, got tired of messing with shimming the seat switch so it worked reliably. As Tazza has said, just remove the sensor and magnet, play with them to see where the sweet spot is between the magnet and the sensor, and glue the sensor in place. Being less brave, I wired mine in place, but it's working swell now!
---Bobbie-G
