Is a fan hub assembly supposed to have seals

[donnyG]

I have searched the forum topics to see if i could find an answer to this question but nothing specific found. I was hearing a rattle or ticking noise coming from my fan area last summer. I filled the hub with motor oil using the procedure in the manual and the sounds went away for a while but came back. This winter I removed the assembly and noticed some play on the shaft coming out the back. i figured it might be due to a bad bushing or seal so I disassembled the unit and found no seal or bushing. Just a steel cone tapering down to the hole in the back. According to the manual there is no bushing in the hub. Does the endplay mean the bearing hub is worn?

[Willy]

The owners manual I have (1952 version) says to use 90 wt gear oil in that pulley. Motor oil would be a bit thin for it.

[Urbish]

The owners manual I have (1952 version) says to use 90 wt gear oil in that pulley. Motor oil would be a bit thin for it.

Not sure where you're seeing 90wt gear oil, but a lot of people see "belt pulley" in the lubrication guide and think it is referring to the fan pulley when it is referring to the PTO belt pulley housing (which does require 90wt oil).

[Urbish]

I have searched the forum topics to see if i could find an answer to this question but nothing specific found. I was hearing a rattle or ticking noise coming from my fan area last summer. I filled the hub with motor oil using the procedure in the manual and the sounds went away for a while but came back. This winter I removed the assembly and noticed some play on the shaft coming out the back. i figured it might be due to a bad bushing or seal so I disassembled the unit and found no seal or bushing. Just a steel cone tapering down to the hole in the back. According to the manual there is no bushing in the hub. Does the endplay mean the bearing hub is worn?

Pages 8-10 of GSS-1016 Cooling System show the fan hub assembly and seal. You can download from this site at "Quick Links", "PDF Manuals", "Service Manuals", "Blue Ribbon Service Manuals", "GSS-1016 Cooling System 8-17-55".

[Barnyard]

The owners manual I have (1952 version) says to use 90 wt gear oil in that pulley. Motor oil would be a bit thin for it.

That manual has to be wrong. I found the following in the 1952 manual.

[Urbish]

From the 1952 manual. This is referring to the PTO belt pulley, not the fan belt pulley:

[Urbish]

Fan pulley is supposed to have engine oil. Also from the 1952 manual:

[Jim Becker]

Yes, what Urbish said. The fan hub is one thing, the belt pulley housing another.

Also, beware that many of the exploded diagrams of the fan hub assembly show the spiral piece in front of the hub backwards. It was corrected in later diagrams. The one Urbish posted above has it backwards.

[John *.?-!.* cub owner]

Yes, what Urbish said. The fan hub is one thing, the belt pulley housing another.

Also, beware that many of the exploded diagrams of the fan hub assembly show the spiral piece in front of the hub backwards. It was corrected in later diagrams. The one Urbish posted above has it backwards.

I was just going to point that out also.

[donnyG]

I have always used motor oil in mine and i believe that is correct. My question though is is it normal to have play in the shaft on the hub end and is it expected to leak a little oil from the back of the hub during operation? If i put the shaft into the bearing at the bench it is a pretty sloppy fit. Is this to be expected or is it worn out?

[Glen]

Hi Donny,

Yes, a little oil works out the rear of the fan hub during use. They usually stay at the right oil level, and don't leak much though.

The fan hub bearing and shaft should fit together with no looseness, it sounds like yours might have gotten worn from low oil. I'm not sure about the end play, I think there is none when the unit is in good condition. Maybe Jim B will comment about it.
I called the Case IH dealer where I buy parts, they don't make part that runs on the shaft separately.
He said they sell the whole assembly new, it's the Tisco brand, for $105.69. It comes with the fan blades too. He thought it is the newer style with sealed bearings. You can think about that, I guess.

[Steve-N-Tn]

Donny, I have used one of these for over 3 years now and haven't had a minutes trouble. I have purchased several things from this seller and have never had a problem. $69.92 with free shipping

https://www.ebay.com/itm/Fan-Assembly-F ... MHPB_ki9AQ

[Slim140]

If you have any friends who are A & I dealers they can get you one for close to the eBay price.

A-251427R1 is the part number for the complete unit.

[Glen]

Hi,
In the listing on ebay that Steve-N-Tn posted above, the man says that the fan fits "Cub sn# 501 thru 165152,"

There were 2 different sizes of generator pulleys used on the fan hubs, the newer pulley is larger than the older pulley.
That listing above would have the smaller size rear, or generator belt pulley, than the pulleys after that serial number.
The newer pulley was used on the LoBoys also. No LoBoy had the smaller pulley.
Before buying a fan assembly, be sure it has the right size pulley.

[Willy]

My bad on the belt pulley vs fan pulley. I seem to have 90w on the brain lately.

The fan pulley is one that all I can do for now is run it until it goes bad. That screwdriver slot on the plug is all buggered up on mine to the point that a screwdriver won't start to grab hold. I thought about drilling it out and retapping it but figure that the resulting metal chips would finish that bearing off.