B7500 HSD bogging down & overheating
- Thread starter enonhall
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sandyc
Veteran Member
As a thought, I would drop the mower and remove the belt and make sure that the spindles for each of the blades turn freely, same for the idler pulley. Could be that you have a frozen or soon to be frozen shaft. There is a thread regarding the lack of grease from the factory/dealer.
Good luck
Good luck
sandyc
Veteran Member
Whoops...almost forgot...make sure the u joints are well greased as well. With the mower deck up the drive shaft is pretty much aligned. Once you drop the deck you are stressing the u joints
gduff
Member
It sounds like you are checking all the right things. (I.e. radiator screen etc.) Just a couple of thoughts that you may have already checked... Is the outside grill on the tractor clean? Your lawn may be kicking up some debris that is plugging it. (More apt to happen with a rotary cutter than a mower, but worth a check)
Is your grease/fluid level in your mower deck correct? Do you have a bent or damaged blade or a damaged bearing?
I agree that if you cannot determine this quickly it is time to get it to the dealer.
Is your grease/fluid level in your mower deck correct? Do you have a bent or damaged blade or a damaged bearing?
I agree that if you cannot determine this quickly it is time to get it to the dealer.
DieselnHooters
Platinum Member
can you run some other PTO driven implement? If they run fine then you know the problem is the mower.
Henro
Elite Member
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Just another thought...but if it is the mower, and the engine is overheating because it is being overworked by a defective mower component, then something on the mower should be getting real hot, since you don't appear to think the problem is true load caused by really high grass or something like that.
So you might try feeling the mower gear boxes and the belt, and this way locate the bad part of the MMM, if indeed there is a bad part...touch gingerly...
The brush hog test is a good idea. If you get the same results with two implements, the problem is unlikely an implement...
So you might try feeling the mower gear boxes and the belt, and this way locate the bad part of the MMM, if indeed there is a bad part...touch gingerly...
The brush hog test is a good idea. If you get the same results with two implements, the problem is unlikely an implement...
JerryG
Super Member
Can you get to where you can see straight into the fins on the radiator? A lot of times, it will look like a radiator is clean from an angle, but the plug will be deep in the fins. If that is the problem, post back and I will tell you a easy way to get it out.
BillyP
Veteran Member
<font color="blue"> I can run it all day without the PTO engaged...no problem.
I can run it all day with the PTO engaged and the mower deck off the ground...no problem (not that I do this).
The minute I start cutting grass (even short, thick grass) the engine bogs down, black smoke emits from the engine and the temp gauge shoots almost immediately to the red.
</font>
According to the above statement, it sounds like something in the deck isn't right. You could have a bad bearing in one of the spindles but that would cause belt slippage. Sounds more like a problem with the main gearbox on the deck.
If it overheats a little before starting to bog down, I'd check the radiator fins. If they are stopped up with grass and such, it can cause an overheating problem (especially under load).
My first guess would be something in the deck is binding, when you start cutting grass.
By the way, never shut off a hot engine. Always take the load off and let it idle for a few minutes. This will give the radiator time to cool the water and keep it from boiling.
Good luck
I can run it all day with the PTO engaged and the mower deck off the ground...no problem (not that I do this).
The minute I start cutting grass (even short, thick grass) the engine bogs down, black smoke emits from the engine and the temp gauge shoots almost immediately to the red.
</font>
According to the above statement, it sounds like something in the deck isn't right. You could have a bad bearing in one of the spindles but that would cause belt slippage. Sounds more like a problem with the main gearbox on the deck.
If it overheats a little before starting to bog down, I'd check the radiator fins. If they are stopped up with grass and such, it can cause an overheating problem (especially under load).
My first guess would be something in the deck is binding, when you start cutting grass.
By the way, never shut off a hot engine. Always take the load off and let it idle for a few minutes. This will give the radiator time to cool the water and keep it from boiling.
Good luck
slowzuki
Elite Member
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- Kubota L5030 HSTC, MF 5455, Kubota M120, Allis Chalmers 7010
I just reread this, head to the dealer, if the deck is fine, something is wrong with your injection pump.
To me it sounds like the pump may be out of time, this can cause overheating and smoke production, without any power being developed.
Or the air filter may be severely clogged, but it likely wouldn't start very easy.
The dealer can sort it out.
To me it sounds like the pump may be out of time, this can cause overheating and smoke production, without any power being developed.
Or the air filter may be severely clogged, but it likely wouldn't start very easy.
The dealer can sort it out.
