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Case 580 G Backhoe water pump fan issue

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Paul murphy

Member
Joined
Dec 14, 2019
Messages
11
Location
UK
Hi,
can anyone enlighten me as to how the fan and pulley is fixed on to the water pump on a Case 580 G Backhoe please?

The fan and pulley seem to have come off the shaft and destroyed the honeycombing in the radiator. On close investigation and removal, We assumed a bolt holding the fan on the pump shaft would be the issue but now it's off, there is no bolt hole in the end of the pump shaft, nor is there a keyway or any visible means of fixing.

I have only been brought the damaged parts and a few pictures as I am helping the young guy who bought it from me but the only conclusion I can come to is the pulley/fan is held on either by a taper or an interference fit at the factory.

Any thoughts or guidance would be gratefully received and save me thrashing about in the dark for several hours.

Many thanks in advance.
Paul.
 

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Midnightmoon

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Nov 9, 2013
Messages
445
Location
Ny
What's the serial# should be like this
 

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Paul murphy

Member
Joined
Dec 14, 2019
Messages
11
Location
UK
Hi Midnight,
Can't get serial number at the moment as the machine is not here, but will try.

Thanks for the response, the whole fan and pulley assembly has come off shaft "A" . No indication of how it is fixed?

Last time I saw a fan that bad it was on a German fighter that came down in France. :)
 

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Midnightmoon

Senior Member
Joined
Nov 9, 2013
Messages
445
Location
Ny
Replace water pump 1-6 comes with pump that includes pulley. Bad design in my opinion. Water pump fails and takes out radiator. Keeping a close eye on water pump and coolant level is important. Water pump will start leaking before it takes out radiator though
 
mks

mks

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“Last time I saw a fan that bad it was on a German fighter that came down in France”
I’m thinking fod. Foreign object damage.
 
P

Paul murphy

Member
Joined
Dec 14, 2019
Messages
11
Location
UK
As far as I know, the machine was working and a noise was heard, then steam and water everywhere. On stopping the machine, the fan was just implanted in the radiator and the whole thing was loose and off the shaft.
I may have to get my desk light out and interrogate my granddaughters boyfriend some more!
 
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Paul murphy

Member
Joined
Dec 14, 2019
Messages
11
Location
UK
If you look closely on the first picture I posted the boss coming out of the pump is not in the centre of the pulley, offset to one side.
I wondered what anyone thinks about drilling a hole right through the shaft and putting a bolt through so it can't happen again?

Am I also correct that putting a new fan belt on is quite a job too, (may as well while it's in bits.) does the pump at the front have to come off?
 
D

Delmer

Senior Member
Joined
Jan 3, 2013
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8,891
Location
WI
The pump should be able to be moved forward enough, or just move the coupler enough to get the fan belt slipped in to place.

I agree, that hit something from outside the machine in order to bend like that while staying on the shaft. It doesn't matter much at this point, as it's not yours or your responsibility, tell them to get new parts and put it together right. I wouldn't trust the fan, hub, or water pump at this point. The radiator could be soldered if it's in decent shape, but even then I wouldn't trust any of the other parts.
 
alrman

alrman

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Jun 20, 2009
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3,308
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QLD Australia
Occupation
Diesel Fitter;Small Business Owner;Cleaner
If you google the pump part number K207178 you will come up with various suppliers of the pump including the pulley.
I would think CNH would no longer supply the complete pump & the only source of parts would be aftermarket.
Most times the quality of aftermarket is really not desired - but it maybe your only choice.
As for the radiator..... I think your local radiator repair shop will need to recore it - that is, if they still do that old school type of thing...... :rolleyes:
 
P

Paul murphy

Member
Joined
Dec 14, 2019
Messages
11
Location
UK
Thank you all for your help.:)
Finally, does anyone know the belt number or length as we will change out the belt as the other was in shreds?
Thanks again.
 
J

joe--h

Senior Member
Joined
Jul 22, 2009
Messages
1,259
Location
Utah
Water pump pulley is pressed on from new. Just like your Chevy. Or Ford.
Joe H
 
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