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.