stopping B 7100

[PIERRE]

Hi, I am new owner of a second hand B 7100 living in France. Searching through the archive gave me lots of interesting info and since it's my firts diesel tractor this was great help.
I have one question regarding the way to stop the engine. On my B 7100, when the engine is running, if I turn back the key to the "0" position the engine does not stop. The only way to stop it is to pull the decompressor key ( labelled STOP ). The problem is that both in the manual and on the sticker they say that this should not be done since it is not good for the engine being stopped this way.
Does it mean my B7100 has a wiring problem ? Any one has an idea ?
Thanks.

 

[Thomas]

Hello Pierre.
I'm not sure what year your B7100 is.
When I stop the engine on my B7100 it states to pull the throttle lever back completely until the engine stops and than turn the key off,and never use the key to shut off the engine.

If you are having problem shutting the engine off check the throttle linkage.

Also when shutting of the engine, bring the engine rpm down to a slow idle.

By the sounds you don't have a wiring problem.

If you should need the basic infomation maybe I could help for I have a B7100HST,an there others on the forum with alot more knowledge than I.

How the weather over there in France?

Take care and stay safe.

Thomas..NH

 

[TomG]

I don't know about the B7100, but most diesels have a kill switch. On my tractor, the kill switch is simply moving the hand throttle all the way closed. The tractor won't start with the throttle in the kill position either. The key doesn't stop the engine on tractor either, and I think that's the way most diesels work. On gas engines, the key cuts the ignition circuit, but diesels don't have spark ignition.

 

[Anonymous Poster]

Be carefull! Using the decompression lever to stop the engine can and will destroy the valves in short order!
I have a B6000 and on the hand throttle there is an additonal lever underneath that you pull up to close the throttle all the way--that way the hand throttle works fine at idle but the additional lever is spring loaded and closes off the fuel supply to shut the engine off. The lever on mine is about an inch long and sticks out toward the operator part way down the hand throttle.

 

[MChalkley]

There is only one way to stop a diesel engine properly - shut off the fuel flow to it. There are a number of ways to do this, depending on how the manufacturer designed the tractor.

On most newer models, the tractor does indeed cut off with the key, because there's a fuel stop solenoid which has to be energized for fuel to flow into the injection pump. On these tractors, there's also a manual stop lever or push/pull rod that shuts off fuel flow in case the solenoid were to stick in the open position or the keyswitch were to fail.

If your tractor is old enough that it doesn't have this stop solenoid "kill switch", you have some other way to stop fuel flow. It could be by pulling the throttle all the way back past idle to a stop position, or it could be another lever, usually with a red button on the end, that you pull or push to stop fuel flow. Just remember that after the engine stops, you have to return the lever to its original position or it won't start again.

And you should not use the decompression lever. As has been said, this will, over time, damage the engine.

Mark

 

[Kelvin]

I have a B7100 just like yours.

The fuel shutoff is on the right hand side of the tractor (as you are sitting on it) below the sheet metal (next to the main throttle lever). The main throttle lever has to be nearly full forward (lowest RPM) in order for the operator to be able to use move the cutoff lever.

 

[PIERRE]

Hi Kevin,

You are absolutely right, I found this lever and it stops the engine !

Thanks a lot.

pierre

 

[PIERRE]

Hi Thomas,

Thanks for the info.
Weather here is not as good as it should be normally.

 

[PIERRE]

I have the same lever on my B7100 and it works.
Thanks

 

[Kelvin]

Re: B7100 ThermoSiphon Cooling

Pierre,
I know that there must be someone out there who gets tired of hearing me talk about the cooling system on the B7100 (I posted this information a lot on the last board). But if it saves a few engines, then I'll keep on talking/posting.

Basically, the B7100 does not have a thermostat nor water pump (the altenator is mounted behind the fan and resembles a water pump...look for the wires). This really is an adequate system if you know its oddities. Never use more than 50% antifreeze and always pre-mix it with the water before you put it in the radiator. The water will circulate on its own as it heats up. It is important to keep the radiator clean (inside and out).

I have a B2150 HSD in addition to my B7100 gear drive (4wd). I still enjoy using the B7100 for a lot of chores, especially mowing with its mid-mower. I have recently purchased a good used set of turf tires & rims to go with the AG tires & rims that came with the tractor and have named my B7100 "the little tractor that could...".

Hope you find this helpful.

 

[Chris]

Re: B7100 Turfs

Kelvin: I have an old B7100 that I am interested in fitting with turfs. Where/how did you find the rims/tires, and what size are they?

Chris

 

[Anonymous Poster]

Re: B7100 Turfs

When you find out, check to see if any of the new units have the same rims and tires. If you are able to order a set of rims and tires through the dealers "whole goods" system the price can be shockingly different then through parts, but I think it has to be a recent unit to do that. I picked up a set of ags mounted on rims for our BX for $300 (4). Was quoted $500 $750 $900. Keep checking!

 

[Thomas]

Re: B7100 ThermoSiphon Cooling

Kevin.
Instead of saying " the little tractor that could" how about the little tractor than can.
For I also have a B7100 and has done everything that I have ask of it.

Take care and have a fine weekend.

Thomas..NH

 

[Thomas]

Re: B7100 ThermoSiphon Cooling..Kelvin..oops.

Kelvin.
I apologize for useing the wrong name!!
Also you wrote saying the "the little tractor that could" and I meant to say the little tractor that can,
for I also have a B7100 and its done evrything in which I ask it to.

Now I have to finish cleaning up the cup of coffee I dump on the desk also in my lap....ouch.

Have a great day.

Thomas..NH

 

[Thomas]

Re: B7100 Turfs

Kelvin.
This was the only information in which I could find on my turfs,I hope it well help.
Del right about sticker shock if you plan on ordering both front and rear turfs from a dealer.

Take care and have a pleasant day.

Rear turf.
Stamped on the rim 15 OLB F&H
Tire size: 29x12.50-15......4Ply.
15 inch rim. Front turf: 20.5x8.0-10......2Ply.
10 inch rim.

Thomas..NH

 

[Kelvin]

Re: B7100 Turfs

Chris,
# Lugs?: One of the biggest concerns that you'll have to be careful about is that the older B7100s used 4 lug front wheels whereas the newer B7100s use a 6 lug front. You may find a good deal and won't be able to use them. Trivia: I have also learned that the wheel base is different between the two and that is the reason why the older B7100s can't use front end loaders designed for the newer B7100 HSDs.

Tire & Rim Size: My front turfs are 20x8.00-10 (same as Thomas' in his reply) and my rear turfs are 29x12.00-15 (Thomas' was 29x12.50-15). I believe that Thomas has the newer B7100 HSD. I gather that the gear ratios between the newer and older B7100s may be different as well or else Thomas or I may have the wrong tire size.

Finding Turfs: The tires and rims that I bought had been sitting at the back the local Knoxville TN dealer for a while. After putting it off for several months, I finally bought them. So far I have no regrets. Comparing to my Ag tires, I was a little afraid how they would handle on my steep slope when wet, but they did just fine (except the one time I forgot to put it into 4wd, but that's another story that was posted on this board a long time ago by someone else). They appear to have better traction than the Ags on dry grass. They are slightly lower profile, though, and so the mid-mower deck drags when I drive it on the trailer now. I have owned this tractor for over 3 years and this is the first time that I have seen turfs for the older B7100s. I believe that the dealer may still have a set of used rear turfs for the B7100 out behind his store, but he doesn't have any of the 4-lug front tires & rims, with exception of the complete set of 4 that is on the used B7100 on his lot.

Hope this helps...
Kelvin

 

[Chris]

Re: B7100 Turfs

Kelvin: thanks for the info. I do have the 4 lug front. How old is your B7100? I'm not too awful far from Knoxville (right off I-81 in SW Va.), so if you run across a dealer with a set up I can use, I'd appreciate knowing about it.

Thanks, Chris

 

[Kelvin]

Re: B7100 History?

It seems that no one knows for sure how old a "Kubota" tractor is. Even when you buy in brand new off the lot it could be a year or two old. I believe that my B7100 was produced in the late 1970s.

I will pass along the information that I have been able to gather (compiled from reasonably reputable sources (dealers and owners) but subject to error nonetheless. Here Goes: The 1st generation B7100 (original gear drive w/4 lug front wheels) was produced from mid-late 1970s until around 1984. I believe that this 1st generation B7100s was the one with the hidden fuel shut-off lever that started this whole post to begin with. There may have been a one-year break and then the 2nd generation B7100s (w/hydrostat option) were produced. The original hydrostat models did not have ROPS, so there may have been a 3rd generation of B7100s somewhere in the late 1980s or early 1990s. The Knoxville dealer still had a brand new B7100 HSD on his lot in the summer of 1997, the last year they were supposedly produced.

 

[pdxman]

I also a new owner of a previously owned Kubota (B6200 HST delivered yesterday). I am confused by this discussion. All Kubotas in the B6xxx series I looked at, when test driving, the dealers or owners would shut the machine off by using the decompression lever. Are the B6xxx series different? What other reason is the decompression lever used for if not to stop the engine? I'll pick up an owners manual somewhere for reference on other things but this topic has me concerned as I don't want to wreck my investment.

 

[MChalkley]

I don't think those tractors you drove even have a decompression lever. What you saw is the fuel stop lever. A decompression lever is typically found on older tractors and is used when starting them.

Mark