crankshaft oil pump for 5245 ?

[Renze]

Can anyone show me what the crankshaft mounted oil pump looks like on a 5245 ? You could get it as a factory option.

I want at least 60 liters per minute. The pump in the rear end can only deliver 32...
A picture of any aftermarket oil pump kit, will also be of help .

 

[markku]

You need flange to belt wheel, shaft and pump. Only problem is fitting pump to front... There is no place to bolt it. There is places for threads, but no drillings You must break front casting off and put it on drill or machining centre and drill holes.... Unless you wont want to take a risk and bolt the pump only with 4 * M12- 12.9 bolts. I was concidering the same to my 6245 with log grane but it was too much work for me Allways you can make a bracket for pump and bolt it to holes where is frame for front ballast weights. Then you can integrate oil tank for external hydraulics and pump bracket. (You cant take 60 l/min from 5245 gearbox, you need least large oil cooler. And if you want run original pump at the same time.... well it is boiling oils soon!) But system bolted to front, outside bonnet, is bad when you have front loader.....

 

[Renze]

In Holland, the dealers offered an option for a crankshaft mounted pump.... I dont know if they fitted that directly to the crankshaft or if they used belts and pulleys...

I can also weld a pump bracket to my loader frame.
Will the standard belt that drives alternator and water pump, be strong enough to drive a big oil pump ?

 

[dave_peters]

Our 7245 front pump only uses 4 m12 bolts on an L shaped bracket, with an off the shelf plastic slightly flexible coupling and a flange turned down to fit the pulley and bolted onto 4 tapped holes in the pulley. Its not a Zetor conversion , it was made up by a dealer called Morris Corfield.
It gets its oil from the bottom of the 4WD housing, has a gauze filter on the suction side and returns to the hydraulic trailer brake servo. The pump plate is not off a 7245 but a 6945.I can't remember the reason for this, but I've got a 7245 pump plate complete with pump, only done 50 hrs if anyone wants one !!
Here's a couple of poor pics of the "new" pump and filter, been on now for 4850 hours.

<a href="http://s140.photobucket.com/albums/r13/dpeters_01/?action=view&current=7245hydpump.jpg" target="_blank"><img

<a href="http://s140.photobucket.com/albums/r13/dpeters_01/?action=view&current=7245filter.jpg" target="_blank"><img

<a href="http://s140.photobucket.com/albums/r13/dpeters_01/?action=view&current=7245.jpg" target="_blank"><img

Tractor has beem topping all day, and has an oil leak somewhere on the compressor, so its dirtier than usual.

 

[Renze]

Do you have a pic of the front pulley and flexible joint ?

and is that a standard pulley ? From the parts manual i think to remember that tractors with front PTO had a different pulley and fixation bolt... dunno why.

It looks like it should be quite easy to mount a pump with a straight shaft.

 

[dave_peters]

Sorry Renze, I can't get into it to photo. Coupling is under radiator. Male part bolts onto pulley with 4 studs tapped into it, then a plastic coupling onto another male part which is splined to fit the pump. coupling parts are off the shelf. If I was going to do it again I would consider the own brand Zetor front pump, simply because it takes the best part of 2 hrs to change the fan belt on ours, and I believe the Zetor coupling can be slid out of the way, although I havn't seen one close up

 

[Renze]

you mean a flexible claw coupling with rubber inbetween the claws, like this: http://www.oudshoorn-hydraulics.nl/afb/omt/flex_kopp1.jpg ???

So there is an original Zetor solution for front mounted pump, and what the dealers offered wasnt something that the importer made up for his dealers ?

how many liters per minute does yours give ?

 

[dave_peters]

That type of coupling wouldn't last at 2200 rpm working hard.
Ours is similar to this:

<a href="http://s140.photobucket.com/albums/r13/dpeters_01/?action=viewt=RTK-index.jpg" target="_blank"><img

Ours is supposed to give 40 ltr/min @2000 rpm.
Later 7245's in UK had a front mounted pump with Zetors's own setup.

 

[Renze]

The new pumps i get from Igor, deliver 32 liter per minute.
I think i better get a new one by mail, then plumb the spool valves of the loader, with a direct hard line from underneath the rear axle for max. efficiency.

I'm doubting anyways, if my existing system will let 60 liter per minute pass without boiling....

 

[dave_peters]

Well , the big red,green and blue competitors get 60+ litres per min through a 1/2" coupling....

 

[Renze]

half inch coupling or half inch pipe diameter ?

And are these gear pump systems, or load sensing systems ? That makes a big difference in heat development, because in load sensing systems there is no free circulation, the pump doesnt move oil when there is no spool valve open...

 

[dave_peters]

Half inch internal pipe diameter. Always seems too small to me for things like bale wrappers etc

 

[markku]

And Same did use 3/8" pipes and valves in some models with 70 l/min pump. Those are then boiling oils when warm weather. I know some damaged quicke loader valves etch, wich occured by too hot oils.

 

[Renze]

Zetor had problems on Forterra models too, with 70 liter pump. This was on models with old Zetormatic hitch. Later models with EHR, they had bigger electronically operated valves that were bigger.
When dealer changed the tractor to a 60 liter pump, there were no problems...

Because of the work involved to change everything, i think i'll just stick with a new 32 liter pump, with a direct half inch hardline to the valve block....

 

[dave_peters]

Probably the best thing to do, older valve blocks tend to cause oil heating if the flow is too high. I'm all for simplicity.