Was driving the tractor and the tractor just died I found the opc fuse blown. Now when I turn the key on it blows the 5amp fuse. I have unplugged the seat, and the neutral safety switch, also unplugged the alternator and still was blowing fuse. Also looking for a services shop manual.
B2650 keeps blowing opc fuse
- Thread starter Popcornman
- Start date
I think others on OTT with the B2650 have had trouble with the HST pedal "neutral" switch causing those problems. I've been lucky so far with mine. Not sure if you meant the neutral switch on the range selector lever or the HST pedal. Also look for wires that might be getting or have been pinched and shorting to ground near those points. Apparently those HST pedal switches are prone to internal failures if I remember right.
I removed this switch and unplugged the switch under the seat. And still blowing fuse when i turn key on.
Attachments
Here are some schematics for the B2650 regarding the OPC
You need to go through the following test table to verify the operation of the various components. Difficult to do when the fuse is blowing.
Sometimes it is just the OPC unit itself absent rodent chewed wiring.
The many safety switches usually fail by either not closing when they should or not opening when they should. A switch going to ground is unlikely.
Dave
You need to go through the following test table to verify the operation of the various components. Difficult to do when the fuse is blowing.
Sometimes it is just the OPC unit itself absent rodent chewed wiring.
The many safety switches usually fail by either not closing when they should or not opening when they should. A switch going to ground is unlikely.
Dave
I ALSO UNPLUGGED ALL THE RELAYS ONE AT A TIME AND THEN PUT IN A NEW FUSE EACH TIME CAUSE IT STILL WAS BLOWING
whitetiger
Moderator
Staff member
Equipment
Kubota tech..BX2370, RCK60, B7100HST, RTV900 w plow, Ford 1100 FWA
You very likely have a wire rubbed through or chewed that is shorted to ground under the dash.
GreensvilleJay
Well-known member
Equipment
BX23-S,57 A-C D-14,58 A-C D-14, 57 A-C D-14,tiller,cults,Millcreek 25G spreader,
If you remove the OPC 'controller' and the 5A fuse blows then the fault is in 10,11,12,13,14,15 or the wiring connecting them. if you disconnect all of the switches and it still blows...you'll have to look at 100% of the wires for shorts to ground.
Ok found the 1 problem the pto switch had broken and was shorting out the fuse. Replace with new part. It has stop blowing fuse and I can a LCD screen now. But itbstill will not start. Any input?
Russell King
Well-known member
Equipment
L185F, Modern Ag Competitor 4’ shredder, Rhino tiller, rear dirt scoop
Won’t crank at all (turn over) or engine won’t fire off and run?
Will not start describes both so please explain what you mean more precisely
Study the safety switch table provided in post #5.
Any line that has a "Can not Start" is a possibility. HST switch features prominently in the table.
With some thinking and a little experimenting, you can quickly rule out some switches.
Look at lines 1 to 4 as an example. HST switch and pto switch
Now that the 5 amp fuse is not blowing, double check the 30 amp one. Unlikely because if it were blown you would still hear the starter relay click.
Dave
Any line that has a "Can not Start" is a possibility. HST switch features prominently in the table.
With some thinking and a little experimenting, you can quickly rule out some switches.
Look at lines 1 to 4 as an example. HST switch and pto switch
Now that the 5 amp fuse is not blowing, double check the 30 amp one. Unlikely because if it were blown you would still hear the starter relay click.
Dave