Kubota lawn mower

Ellis Kinney · May 24, 2020

My neighbor has a B7100 HST riding lawn mower. It is over heating. The belt is not turning the fan. I have never messed with a Kubota and don't know much about them. Is there a fan bearing that is seized or would it be the water pump. Or both???? If you can help me out with a little info I would appreciate it. Thanks, Ellis

DoubleR · May 24, 2020

If the belt is tight sounds like the water pump. I had a similar problem with my Kubota mower after 3500 hrs. A new water pump solved my problem. Called a kubota dealer and it was 200 bucks. Brought one on-line for 60 bucks. That was three years ago and its still going.

john in la · May 24, 2020

Are you saying the fan belt is turning but the fan will not spin so it is over heating???

If so the bearing in the dynamo is frozen.
Kubota's word for alternator.
The tractor does not have a water pump.
That piece behind the fan is the dynamo.
You can rebuild it with new bearings or just replace the whole unit.

john in la · May 24, 2020

By the way........

The job will include bending a wrench to get to 1 or 2 of the bolt/nuts.
I think the shop manual says to remove the head to get to them.
But if you are diligent you can do it with a bent wrench rather than removing the head.

jm. · May 24, 2020

The other poster has it right his dyno is locked up pretty common, folks come in and inst that there water pump is locked up but the B 7100 has one water pump. Pretty good job but bearings will usually get it going.

Ellis Kinney · May 24, 2020

The fan belt is not turning. Ellis

john in la · May 24, 2020

So what pully is the fan belt slipping on????

If the crank pully is turning it could be the dyno pully has a better grip on belt.
You will need to take the belt off and try and hand turn the fan to see if it is locked up.
If nothing; including the crank pully are not turning the key on the crank pully is broken.

I keep going back to the dyno because it is the most common.
But you either have a broken key on the crank or something is froze up preventing the belt from turning.

4520BW · May 24, 2020

If it's a diesel dont overheat it. Once there hot the motor its junk. I just tore an rtv down that the radiator was plugged with mud and cracked the head and scored a cylinder.

WAYNE-N-TEXAS · May 25, 2020

Tried to answer yesterday, had it written , storm come through wiped out my internet.

NO water pump, mine did the same. not a bad job.

Kubota lawn mower

Ellis Kinney

Well-known Member

DoubleR

Well-known Member

john in la

Well-known Member

john in la

Well-known Member

jm.

Well-known Member

Ellis Kinney

Well-known Member

john in la

Well-known Member

4520BW

Well-known Member

WAYNE-N-TEXAS

Member

Similar threads