Well. its all back together now, and, its works.....

[kubotasam]

Yep , dual belt pulley wheel.
All versions that use the top mounted alternator such as this have a dual belt pulley from the factory as standard, but i dont think other spec machines destined for other markets may have them.

rob

Can you post a picture of the duel belt pulley?

 

[Rob]

Sure can, give me a little while to go back through my pics.

rob

 

[Rob]

Here you go, one of the parts listings, and one of the actual item concerned.

rob

 

[Rob]

Here is another pic of the dual belt pulley.
This is the fitment on my B8200, Its a D950 based engine and uses a very similar bracket as that on my B7100 with a D850 unit, but same pulley wheel in both cases, just a slight variation in bracket designs allthough all use the same fitting/bolt points.

Over here a lot of B6100,7100 use the same brackets, with the D650/750 engine, i have th 850 unit but all are 70mm series engines so share a common layout.

rob

 

[kubotasam]

How would one here in the US go about finding that bracket and pulley assembly? Also does yours have a water pump behind the fan where US tractors have the dynamo? I would love to have an alternator and the extra cooling of a water pump.

 

[seanbarr]

Kubotasam,

If you're looking to get an alternator for the B7100, the fan / alternator assembly doesn't drive the water pump as I've taken it apart and there's no such pump for it. I'm waiting for one part to come in to complete my alternator conversion on my B7100DT. When I'm done, I'll make a post on this along with pictures (of course!)

 

[kubotasam]

Kubotasam,

If you're looking to get an alternator for the B7100, the fan / alternator assembly doesn't drive the water pump as I've taken it apart and there's no such pump for it. I'm waiting for one part to come in to complete my alternator conversion on my B7100DT. When I'm done, I'll make a post on this along with pictures (of course!)

I am fairly sure that some Kubota D750 engines are equipped with water pumps. The engines are used in many more applications than just Kubota tractors. That is why when I saw the alternator on his tractor I asked Rob if his tractor had a water pump where our US tractors have the dynamo.

 

[Rob]

I think a little clarifiction is required here guys.
The D650/750/850/950 etc all have water pumps,(well UK market that is, global distrobution may differ) they are part of the 70mm series engines which also inc 4 cyl versions but sharing the same layout/format etc.
Where you are located globally will to a more or lesser degree dictate wether you have a top mounted alternator setup or not, or maybe a side mounted unit as per a lot of D850/950 installations.
In the UK most are as per mine, but there will a lot which are not.
The extra lighting requirements in the UK made it nessacary to use a heavier duty electrical setup( thats from an official Kubota UK source).
In the states you will probably have the lower output version.

There are two belts on UK setup with a dual belt pulley wheel, one belt from the crank drives the water pump/fan assembly via the pulley wheel, whilst the second runs from the rulley wheel to the alterantor.

simple as that.

also diagram of 70mm series engines cooling setup attached and a pic of the D850 before i overhauled it and put in my 7100, dynamo was mounted on the side, i removed that fixing setup and used the fixing method that was on my original 750 engine.
There were a few issues that were not obvoius to start with, such as bolt lenghts differ etc, some fixings were with studs and nuts instead of bolts.
all worked out in th end.
last pic is of the rebuilt 850 with the top mounted alt setup from my original B7100 (d750).
hope that helps.

rob

 

[lsmurphy]

I think a little clarifiction is required here guys.
The D650/750/850/950 etc all have water pumps,(well UK market that is, global distrobution may differ) they are part of the 70mm series engines which also inc 4 cyl versions but sharing the same layout/format etc.
Where you are located globally will to a more or lesser degree dictate wether you have a top mounted alternator setup or not, or maybe a side mounted unit as per a lot of D850/950 installations.
In the UK most are as per mine, but there will a lot which are not.
The extra lighting requirements in the UK made it nessacary to use a heavier duty electrical setup( thats from an official Kubota UK source).
In the states you will probably have the lower output version.

There are two belts on UK setup with a dual belt pulley wheel, one belt from the crank drives the water pump/fan assembly via the pulley wheel, whilst the second runs from the rulley wheel to the alterantor.

simple as that.

also diagram of 70mm series engines cooling setup attached and a pic of the D850 before i overhauled it and put in my 7100, dynamo was mounted on the side, i removed that fixing setup and used the fixing method that was on my original 750 engine.
There were a few issues that were not obvoius to start with, such as bolt lenghts differ etc, some fixings were with studs and nuts instead of bolts.
all worked out in th end.
last pic is of the rebuilt 850 with the top mounted alt setup from my original B7100 (d750).
hope that helps.

rob

Your last pic, the crank pulley, where or which model did that come from? I'm looking at the bolt-on snout with the larger splines, does this slide over the splines on the crank? What is the size of the splines? Is this an adapter?

I'm looking for a drive for a front mounted attachment. As you may know the 22 spline 27mm pulley is impossible to find.

 

[Rob]

In the last pic, the pulley wheel itself is the standard Kubota B7100 fitment, and the bolt on adapter is also the original fitment, it slides over the crank splines and then fixes with the bolts.
removed the pulley wheel on the 850 (pic 3)I then carried the 7100 items over from my D750 engine and onto the D850, just a straight forward fit as the crankshaft is the same unit in both engines.

rob

 

[lsmurphy]

In the last pic, the pulley wheel itself is the standard Kubota B7100 fitment, and the bolt on adapter is also the original fitment, it slides over the crank splines and then fixes with the bolts.
removed the pulley wheel on the 850 (pic 3)I then carried the 7100 items over from my D750 engine and onto the D850, just a straight forward fit as the crankshaft is the same unit in both engines.

rob

Thank you.

So I need to look to the 850 for the pulley?

 

[Rob]

I may have made that sound a bit confusing Sir.
The last pic is a D850 engine that i fitted into my B7100, the pulley wheel and adapter splined plate bolted to it are the original items that i removed from the old B7100 (D750 engine).

Pic 2 is the same D850 engine , but, with the original pulley wheel that was fitted to it, it didnt have the mounting bolt holes to facilitate the fitting of the smaller adapter , so was of no use to me.
Forget the fact its on a 850, all you need to be thinking is that those pulley wheels are a B7100 original fittment.
You need to be looking for an original B7100 or 6100 or suitable third party unit ifyou get my drift.

Maybe other may be the same, but i have not compared any as yet.
someone else maybe able to shed more info i suspect.

hope that helps a bit.
rob

 

[lsmurphy]

As you can see here my original has no bolt holes for the adapter.

That's why I asked.

 

[Rob]

Ah yes, just as i suspected.
I may have 2 part numbers for you shortly.



rob

 

[Rob]

part number descr Serial number

15372-74283 PULLEY FAN DRIVE >=135832
15372-74282 PULLEY FAN DRIVE >=106167
66704-88530 FLANGE PTO

you may have these allready though, i am checking through uk/european parts also for you.

yours is a 7001, so serial number maybe invalid, but same parts on both models.

rob

 

[Rob]

also maybe this one
15372-74280 PULLEY FAN DRIVE

or
15532-74280 PULLEY, FAN DRIVE 1 <=373345
15752-74280 PULLEY, FAN DRIVE

 

[Rob]

just going back a few posts, i do recal leaving some feedback on a thread on the subject of water pumps on 6100/7100 etc , or lack of them as the case seems to be.

From memory, the 70mm series engines in US versions does appear to differ in some aspects, inc the cooling system.
I think its a thremosyphon setup and not pressuried as in uk/european version, hence the lack of a water pump in US parts listings...
I can recal the US version being D750-A whereas in the UK D750-b
or something like that.

rob.

 

[lsmurphy]

Thanks Rob.

 

[kubotasam]

just going back a few posts, i do recal leaving some feedback on a thread on the subject of water pumps on 6100/7100 etc , or lack of them as the case seems to be.

From memory, the 70mm series engines in US versions does appear to differ in some aspects, inc the cooling system.
I think its a thremosyphon setup and not pressuried as in uk/european version, hence the lack of a water pump in US parts listings...
I can recal the US version being D750-A whereas in the UK D750-b
or something like that.

rob.

I wonder if the head is different between the two versions or the water pump and dynamo will just interchange?

 

[rednecklimo85]

My 6100 has no waterpump, the dynamo seals to the head, so it may very well interchange with a waterpump. Kubota did not make it easy to unbolt the dynamo, i had problems getting mine to seal and had to remove it a couple times, found the best way to get at the nuts was with a 10mm ratchet wrench bent into a 90* in the right place.