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Seatbar icon displayed, Bobcat864 won’t start

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jdrouillard

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Joined
Nov 5, 2022
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15
My Bobcat abruptly stopped while using last week. It cranks, but won't start. The seatbar icon is displayed on the screen regardless of position. I replaced the sensor, but no change. Any ideas?
 
jdrouillard said:
My Bobcat abruptly stopped while using last week. It cranks, but won't start. The seatbar icon is displayed on the screen regardless of position. I replaced the sensor, but no change. Any ideas?
Click to expand...
What machine, Serial #? Could you take a picture of the icon?
 
Bobcat 864; Serial Number 518913530. I checked the screen, and no error codes are displayed.
 

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PErhaps this is a seatbelt icon and not a seatbar icon, not sure. I have had the unit for about 8 years and the seatbelt was disabled/removed by a previous owner. It has always run okay without it, so not sure this has anything to do with the failure to start. Fuel seems okay, I opens the filter and pumped the primer bulb. The bulb is full and diesel flows well with no apparent blockage.
 
jdrouillard said:
PErhaps this is a seatbelt icon and not a seatbar icon, not sure. I have had the unit for about 8 years and the seatbelt was disabled/removed by a previous owner. It has always run okay without it, so not sure this has anything to do with the failure to start. Fuel seems okay, I opens the filter and pumped the primer bulb. The bulb is full and diesel flows well with no apparent blockage.
Click to expand...
Ok, that is the Seatbelt sign. Can you try to start the engine and see what codes come ?
either the hammer and wrench sign on the RH panel or hold the light button on the LH side for 3 seconds.
 
Ok, are you comfortable with removing the fuel shut off solenoid and then try if the engine starts? I am thinking that your fuel shut off solenoid is bad.
 
jdrouillard said:
I can give it a try. If this works, could the machine be driven 300 feet to get it to my shop?
Click to expand...
If the engine starts, you have to turn it off either by sticking a screwdriver in the hole where the fuel shut off solenoid was or by stalling it out with the pumps.
But basically you could drive it then until it dies or runs out of fuel.
 
Okay, just saw your new post after removing the shutoff solenoid, so did not see the part about shutting it down. It did start up, and to shut down I ended up disconnecting the fuel line. one of the terminals was pretty lose on the square contact block. I removed the contact block from the solenoid and one of the wires was broken off inside. Incidentally, there are three wires on the contact block that connect to wires 8100, 8110, and 8150. 8100 has never been connected since Whitestar put in a remanufactured engine 6 years ago. If I understand correctly there is a ground, and two contact wires with different levels of resistance-- one to pull the solenoid open and another to hold it open.

System has never had much power-- perhaps this explains why.

Thanks for your help on this. It does appear I still have an issue with the seat bar sensor. I replaced the sensor, but when I put the bar down the light is only on for a split second. I replaced only the sensor, not the magnet with the contact points. Perhaps they are excessively worn?
 
jdrouillard said:
Okay, just saw your new post after removing the shutoff solenoid, so did not see the part about shutting it down. It did start up, and to shut down I ended up disconnecting the fuel line. one of the terminals was pretty lose on the square contact block. I removed the contact block from the solenoid and one of the wires was broken off inside. Incidentally, there are three wires on the contact block that connect to wires 8100, 8110, and 8150. 8100 has never been connected since Whitestar put in a remanufactured engine 6 years ago. If I understand correctly there is a ground, and two contact wires with different levels of resistance-- one to pull the solenoid open and another to hold it open.

System has never had much power-- perhaps this explains why.

Thanks for your help on this. It does appear I still have an issue with the seat bar sensor. I replaced the sensor, but when I put the bar down the light is only on for a split second. I replaced only the sensor, not the magnet with the contact points. Perhaps they are excessively worn?
Click to expand...
If you referring to that symbol on your deluxe panel, that is a seat BELT sign! That will be always on but should disappear after I think a minute or so.
 
jdrouillard said:
Okay, just saw your new post after removing the shutoff solenoid, so did not see the part about shutting it down. It did start up, and to shut down I ended up disconnecting the fuel line. one of the terminals was pretty lose on the square contact block. I removed the contact block from the solenoid and one of the wires was broken off inside. Incidentally, there are three wires on the contact block that connect to wires 8100, 8110, and 8150. 8100 has never been connected since Whitestar put in a remanufactured engine 6 years ago. If I understand correctly there is a ground, and two contact wires with different levels of resistance-- one to pull the solenoid open and another to hold it open.

System has never had much power-- perhaps this explains why.

Thanks for your help on this. It does appear I still have an issue with the seat bar sensor. I replaced the sensor, but when I put the bar down the light is only on for a split second. I replaced only the sensor, not the magnet with the contact points. Perhaps they are excessively worn?
Click to expand...
That is correct, it's called a Pull and Hold circuit
 
As for the seatbar sensor, I was looking for a replacement magnet bushing and noticed the new ones have a metal bar spanning the two contacts. Mine has only the contacts, not the bar.
 
Would failure to connect the third wire (which on the wiring diagram originates at C101) explain the poor performance of the machine? It would never exceed 2500 rpm, but with the solenoid removed it ran at 2900.
 

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