i bought it yesterday from a friend that had it in storage. it has been sitting for a few years. brought it home flushed the fuel and pumped new fuel to injectors. the clow plugs are not heating up i dont think. i have a b8200 so i think i know how to tell. back to the b7100, i canget it to hit but not fire off. any ideas
kubota b7100 4wd hst
- Thread starter walth002
- Start date
How fast is it cranking? Does it have a good battery, not just 12+ volts but pass a load test. Do you have a charger/jump starter? If so, connect it to the battery to increase amperage and try to start it.
4 years ago mine would do the same thing as yours and that is what I did. The combined battery and jump/starter started the tractor right away. replaced battery, problem solved.
A quick easy test.
4 years ago mine would do the same thing as yours and that is what I did. The combined battery and jump/starter started the tractor right away. replaced battery, problem solved.
A quick easy test.
Agreed. A diesel has to turn over pretty fast to create enough heat from compression to ignite the fuel, seperate from what the glow plugs do. In other words, if it is turning over slow, it doesn't compress the air in the cylinder fast enough to generate heat to ignite the fuel that is injected.
I think on my Cummins, it has to turn over at least 400 RPM's to generate combustion.
If you want to get it started before figuring out what's going on with the glow plugs, get it cranking faster, and you can introduce a little bit of starting fluid.
Last edited:
it has a fresh battery in it and i also hooked up my jumper box. turns over as good as my b8200. thoughts thanks
The fuel has to reach a certain temperature before it will ignite- which is why there has to be sufficient compression and glow plugs (when the engine is cold). You might try taking a hot air gun and heating the block- get some heat into it. Or, go ahead and remedy the glow plugs.
Black is excess fuel- you may also want to pull the injectors and have them checked- because it has sat for a long time, they could be sticking open.
What is the history of the tractor? Did it run before it was stored? How did it run? If it did run, I wouldn't expect low compression, unless something was obvious from how it ran before.
Black is excess fuel- you may also want to pull the injectors and have them checked- because it has sat for a long time, they could be sticking open.
What is the history of the tractor? Did it run before it was stored? How did it run? If it did run, I wouldn't expect low compression, unless something was obvious from how it ran before.
North Idaho Wolfman
Moderator
Staff member
Lifetime Member
Equipment
L3450DT-GST, Woods FEL, B7100 HSD, FEL, 60" SB, 743 Bobcat with V2203, and more
I have a 750D here that does the same thing it has bad rings therefore has low compression. You can tell if that is your problem if it's smoking out of the breather tube when you trying to get it started.
alright update; used jumper box to bypass glow plugs relay and went straight to glow plug and tractor final started. i do have a sound that appears to be coming from the water pump when i idle down but i dont have any water leaking out. what could be wrong with the glow plugs and how do i fix it
thanks
thanks
North Idaho Wolfman
Moderator
Staff member
Lifetime Member
Equipment
L3450DT-GST, Woods FEL, B7100 HSD, FEL, 60" SB, 743 Bobcat with V2203, and more
I don't think there is a "glow plug relay"??? But there are many different models of the 7100's, so anything is possible.
You don't have a water pump, what your hearing noise out of is the dynamo, It's generates electric like an alternator.
The D750 in your 7100 uses a heat siphon system. It doesn't have a water pump or a thermostat either.
You don't have a water pump, what your hearing noise out of is the dynamo, It's generates electric like an alternator.
The D750 in your 7100 uses a heat siphon system. It doesn't have a water pump or a thermostat either.
Big Kahuna
Member
Equipment
Kubota 2000 L3010 HST with Loader ,1992 B7100HST , 1979 B6100E & 2007 F2880
A fresh battery and a good battery are 2 different kinds, I don't think your fresh battery is strong enough to turn the engine over and heat the glow plugs, I would start with a good strong battery 500 cca, I don't think you have a problem, get it running for an hour or two and then see what happens.
Big Kahuna
Big Kahuna
Pull them out. If they are slightly bulged near the tips then they are stuffed. You can test them simply by connecting 12v to the threaded body and the connector of the plug. They should get hot fast.
A relay is just a switch that sends 12v to the glow plug wire. Simply connect a light or multimeter to the wire that goes to the glow plug. The other wire goes to earth. When you turn on the relay you should hear it click and the multimeter should show 12v.
thanks i will check them. i am also looking for a used radiator and screen. and ideas or anyone have one for sale
i hooked up a meter to one of the glow plugs and the negitive to battery. turned the switch back to warm glow plugs and meter did not move. ideas
Russell King
Well-known member
Lifetime Member
Equipment
L185F, Modern Ag Competitor 4’ shredder, Rhino tiller, rear dirt scoop
Move toward the switch from the glow plugs, checking for voltage. See this attached link.
http://www.orangetractortalks.com/forums/showthread.php?t=11828
You probably have a hole in the dash with a silver ring around it (near the glow plug switch) that looks like a lens is missing. IF so, that is the glow plug indicator and should glow (but it has to be pretty dark to see it) if power is going to glow plugs. This may be the failure point. Check for voltage on the side not connected to the glow plugs to ensure power is coming from the switch.
http://www.orangetractortalks.com/forums/showthread.php?t=11828
You probably have a hole in the dash with a silver ring around it (near the glow plug switch) that looks like a lens is missing. IF so, that is the glow plug indicator and should glow (but it has to be pretty dark to see it) if power is going to glow plugs. This may be the failure point. Check for voltage on the side not connected to the glow plugs to ensure power is coming from the switch.
Turn the switch counterclockwise and hold it there for 7 clicks on your hour meter or until the glow plug indicator turns orange/red. That is what I must do on my B7100HST and it fires right up everytime. Good luck!