Kubota B7800

[Nedfan]

Hi. I'm new to the forum and a new owner of a 2008 Kubota B7800. So far I love this tractor. It cranks every time but it seems to drag a bit on the starter. Can't read the cold cranking amps on the battery and was wondering what I need for a 30 hp. Don't want to keep straining the starter. Thanks.

 

[number two]

Welcome!
I believe your tractor takes a Group 51R battery.
Those usually come in at about 450 CCA.
A popular size for Honda cars.
Good Luck!

 

[Leejohn]

I have to use the glow plugs just about everytime I start mine, other wise it has to turn over to long. It has been that way as long as I have had it and it had 149 hrs on it when I got it.

 

[JOHNTHOMAS]

One day your will probably not start. Rock the foot pedal till it's centered while turning the key. You'll know it when you see it, if you remember this. It's a part of most B7800. Great machine, had one for 3 years and done lots of major and minor jobs with it.

 

[Nedfan]

Thanks for the info. Not sure about the Honda comment but thanks also.

John, I will try that this afternoon.

 

[JOHNTHOMAS]

Thanks for the info. Not sure about the Honda comment but thanks also.

John, I will try that this afternoon.

My comment is when it does nothing, not when it turns slow. It's for future reference. There is a safety switch under the pedal that stops starting, dead, does nothing, if it isn't centered and the B7800 has a history of the pedal being very tempermental about being dead center. You can try it now but it will, probably, not have any effect on your slow turning problem.

 

[BeezFun]

I have to use the glow plugs just about everytime I start mine, other wise it has to turn over to long. It has been that way as long as I have had it and it had 149 hrs on it when I got it.

Ditto since I bought it new, mine is a kissin' cousin to the B7800. There's a chart in the owner's manual that tells how long to use glow plugs for various temps. Above 32F it's 2-3 seconds, below it's 5 sec, below -5F it's 10 sec.

 

[JOHNTHOMAS]

My second Kubota, about 10 years ago, was a B7800 which I owned for 3 years. Never used the glow plugs and it started as quick as any I've owned. We don't usually, until this year, have severe winters.

 

[Ductape]

After realizing I needed to replace the group 51R battery in my 2005 B3030 (very similar tractor) for the second time, I decided it was time for an upgrade. The 51R was never really adequate in my opinion. I did a little measuring and decided a group 34 would fit in the stock location with little modification. I went from 450 CCA with the 51R to 800 CCA with the 34. Now I can glow plug with reckless abandon !

 

[TomSeller]

After realizing I needed to replace the group 51R battery in my 1995 B3030 (very similar tractor) for the second time, I decided it was time for an upgrade. The 51R was never really adequate in my opinion. I did a little measuring and decided a group 34 would fit in the stock location with little modification. I went from 450 CCA with the 51R to 800 CCA with the 34. Now I can glow plug with reckless abandon !

There is no substitute for CCA when it comes to starting a diesel. I also size up if I can fit it.

 

[Nedfan]

I appreciate all the info. Hate to make any mods.

 

[Nedfan]

I appreciate all the CCA info. I love my tractor and I need a more comfortable seat. I'm getting up in years and this one is a little rough on the buns. Any suggestions?

 

[sixdogs]

I appreciate all the CCA info. I love my tractor and I need a more comfortable seat. I'm getting up in years and this one is a little rough on the buns. Any suggestions?

There was a recall on my B7800 seat about five years ago and I got a new seat. Not sure why but it had to be some sort of bun issue. maybe you have the old seat? Someone here must know more.

 

[Nedfan]

Man, I have a million questions. I need to know what is the largest comfortable bush hog I can pull with my B7800? I mow two ten acre hay fields and need all the width I can pull.

 

[sixdogs]

Two 10 acre fields and a B7800? I'm thinking you're in for some extended seat time. With my B7800 I can pull a 7 ft three bladed rear lawn mower over a lawn I mowed the week before. For taller grass such as a short hayfield I'm thinking 5 ft if you take it sort-of easy. A lot depends on the height of the grass, moisture content and speed but those aren't really meant for much in the bush hogging deprtment.

 

[Nedfan]

Thanks. That's why I need more width. I have a 5 foot Land Pride and it works well, but I was trying to cut down on time. Keeping my ten acres cut. Cutting my neighbor's not as often, but still....

Just bought this place and the B7800 is what the owner had. Fine tractor and I got it at a steal. Just looking at all options.

 

[sixdogs]

Could always trade up for bigger? Actually, the B7800 is so nice you should never sell it but just buy more tractors till you own a stable full. It's easy. Look, your wife has more than one pair of shoes so why not?

 

[Nedfan]

B7800 is too good a tractor. Trying to see what is out there. What better place to ask than here? Appreciate the info.

Wish my tractor could handle a 15 foot batwing. Ha.

 

[Jeff F.]

Could always trade up for bigger? Actually, the B7800 is so nice you should never sell it but just buy more tractors till you own a stable full. It's easy. Look, your wife has more than one pair of shoes so why not?

Hmmm I never thought of it that way. My wife has lots of shoes. I better head to the dealer. I wonder what she would say about the shoe reference. If she has any questions or comments, I will need your number sixdogs!

 

[sixdogs]

Hmmm I never thought of it that way. My wife has lots of shoes. I better head to the dealer. I wonder what she would say about the shoe reference. If she has any questions or comments, I will need your number sixdogs!

I keep telling you guys how to deal with women and tractors. Encourage her to go shopping and buy whatever it is that makes her look and feel nice. Plus give her some extra cash every now and then--on the assumption she is home with kids or whatever. Get a babysitter and take her somewhere nice. When the tax refund shows, give her $200 in cash for no reason.

Then, after a comfortable time, just show up with the tractor or whatever and don't say anything.

Now, you also need the math finance thing figured out and be ready. Here's a cut and paste from a post I did a while back on this very topic. It is honest and true and with the initial advice can get a barn full of equipment.



Tell her the cost of the tractor is not what you paid for it but the difference between it's resale value and the price you paid for it, less the cost of the money involved. In your case, if you pay $20,000 for a tractor and it could be resold for, say $18,000, that tractor only cost $2,000 plus the price of the money involved. if you used savings and since interest rates are zero, the tractor cost $2,000. Now, if you can do work that saves $800 a year that's a pretty good return on the money. That's a 40% return.

As well, there's an expectation that prices will continue to rise and inflation could make your tractor rise even more in price more than it is now. Wow, this is getting better all the time. In fact, explained correctly, the tractor not only doesn't cost but it actually pays to own it. Case closed; order the tractor and tell her you are doing it for her.

Now, the icing on the cake. If you have to take a loan, get life insurance on the note and she will be extra protected if you pass away too soon. She will have the money--more of it --as well as the tractor to sell. Go ahead, order the tractor, you are only thinking of her.