BX2750 Snowblower Fan Problem

[Dusty]

I have been having a problem with breaking shear bolts in the fan assembly of my BX2750, and have been replacing them with the OEM shear bolts. Seems that the blower doesn't like chunks of ice. After the last time, it bent the tip of the fan assmebly, and I straightened it. The second time it bent the entire blade! Has this happened to anyone else? Were you able to straighten it, of is a replacement fan in my future? I have gotten the blade back to the point where it will clear the base lip, but it is still a lot closer on this one blade than the other two.

 

[kevinj]

I have been having a problem with breaking shear bolts in the fan assembly of my BX2750, and have been replacing them with the OEM shear bolts. Seems that the blower doesn't like chunks of ice. After the last time, it bent the tip of the fan assmebly, and I straightened it. The second time it bent the entire blade! Has this happened to anyone else? Were you able to straighten it, of is a replacement fan in my future? I have gotten the blade back to the point where it will clear the base lip, but it is still a lot closer on this one blade than the other two.

What kind of ice chunks are you hitting?????

 

[Dusty]

It broke another shear pin today, so I decided to take it apart to see what the problem is. What I found was that the locking collar on the shaft wasn't set at the proper place by the manufacturer, which allowed the shaft to move just enough that the fan would catch the front edge of the blower frame. I thought that it was ice chunks that was the cause, but now I realize that it was a manufacturing defect. I have ordered a new fan and a few other parts, and it should be good as new this week. Actually better than new, since the factory put it together incorrectly.
If anyone is interested in buying a BX snow blower, Pinnicleview Kubota in Walpole (Keene area) NH had one in stock on Thursday of this past week. It might still be available. (603) 756-3379... Was told that the selling price was approximately $1800 for the blower and the hitch was additional. If you are interested, give them a call for more details.. Good people to deal with.

 

[kevinj]

It broke another shear pin today, so I decided to take it apart to see what the problem is. What I found was that the locking collar on the shaft wasn't set at the proper place by the manufacturer, which allowed the shaft to move just enough that the fan would catch the front edge of the blower frame. I thought that it was ice chunks that was the cause, but now I realize that it was a manufacturing defect. I have ordered a new fan and a few other parts, and it should be good as new this week. Actually better than new, since the factory put it together incorrectly.
If anyone is interested in buying a BX snow blower, Pinnicleview Kubota in Walpole (Keene area) NH had one in stock on Thursday of this past week. It might still be available. (603) 756-3379... Was told that the selling price was approximately $1800 for the blower and the hitch was additional. If you are interested, give them a call for more details.. Good people to deal with.

I have had trouble with those locking collars on other equipment also. They all came loose on my 2750 blower also but I caught it before any damage was done. They have remained tight for the past 4 years.

 

[NY_Yankees_Fan]

Dusty,

Can you post a photo? I want to make sure I am OK not sure where to check.

Thanks

 

[kevinj]

Dusty,

Can you post a photo? I want to make sure I am OK not sure where to check.

Thanks

I think he is talking about the bearings behind the fan and upper chain sprocket that allows the shaft to move fore & aft if the locks are loose.

 

[Dyer retired]

It broke another shear pin today, so I decided to take it apart to see what the problem is. What I found was that the locking collar on the shaft wasn't set at the proper place by the manufacturer, which allowed the shaft to move just enough that the fan would catch the front edge of the blower frame. I thought that it was ice chunks that was the cause, but now I realize that it was a manufacturing defect. I have ordered a new fan and a few other parts, and it should be good as new this week. Actually better than new, since the factory put it together incorrectly.
If anyone is interested in buying a BX snow blower, Pinnicleview Kubota in Walpole (Keene area) NH had one in stock on Thursday of this past week. It might still be available. (603) 756-3379... Was told that the selling price was approximately $1800 for the blower and the hitch was additional. If you are interested, give them a call for more details.. Good people to deal with.

Are you talking about #12 in the diagram? I took my blower completely apart this Spring and found just about every allen set screw, nut and bolt loose. Even the set screws on the bearing collars were loose. I applied Loctite blue on all the loose threads and haven't had a problem since. I also found that the diagram shows two set screws (#17) for the sprocket (#12,) but there was only one that locked the square key in place and the second one is supposed to be pushing against the shaft. The hole for the second allen screw was not drilled through at the factory and no allen screw present, so I drilled and tapped it...put the second allen screw in. I've had my BX2750 for 5 years now and like it a lot. The wings are thinner than I would like and were spreading out when hitting the hard packed banks, making it difficult to change the shear pins when they broke....too much movement side to side in the auger shaft. I wonder if you're finding that too. I've made a temporary fix for that. Dyer, retired

 

[Dusty]

Dusty,

Can you post a photo? I want to make sure I am OK not sure where to check.

Thanks

Are you talking about #12 in the diagram? ....... Dyer, retired

This is not #12 on the parts list. #12 is the sprocket itself.

In the pictures below, you will see the bearing with the locking collar installed and removed. The locking collar goes between the sprocket and the carrier bearing. When I took this apart, I found that the locking collar was tight on the shaft, but was not pushed forward to the bearing, and was serving no useful purpose.
Upon examination of the chain, I found that it had a few broken links, and was severely distorted out of shape. I tried every industrial supplier around, and no one has the original "O" ring chain that was used by the manufacturer of the snow blower. A couple of the suppliers said that they could get me a 10' box of it, and it was $16 per foot, and not sold in a quantity less than 10'. I checked with the Kubota dealer, and the chain is $56 and $7 for the repair link. I opted for a 10' length of standard #40 chain for under $20 and 35 cents each for the repair links. With 10' of chain, I can replace it 6 times before I run out. The original chain is 19" long. The good news is that everything in the snow blower is all standard off the shelf parts, except for the gear box on the auger itself.
One thing that I also found is that the shaft was starting to rust, since the bronze oilite bushings are not good at keeping moisture away from the shaft. For this reason, I am going to install a grease fitting in the fan that will supply grease to these bushings, prolonging there life, and keeping the shaft from rusting. I can see that with use, the shaft will rust, and the fan bushings might just become rusted onto the shaft. I have seen this happen with other tractor mounted snowblowers, and a replacement shaft was required to fix the problem.
I have not had a problem with the sides of the snowblower pushing out, and I have had this blower for about 5 years also. This is the first time that I have had any maintenance issues at all. I also didn't find any loose lock nuts or any other loose parts. It has bee such a good snowblower, that I never did anything to it except to keep it clean and lubricated.

 

[kevinj]

Be sure and check the outboard bearings on the augers. I had them loosen too, and the whole gear box with augers just kind of floats around. As Dyer said, tear it all down and reassemble. I have not had a problem since I done that close to five years back.

 

[Dyer retired]

Dusty,

Thanks for the explanation and the pictures. The bottom drive shaft sprocket is stationary. Once you get the fan shaft locked in where it's supposed to be, the chain should stay lined up on the top sprocket and the new chain should last for another 5 years? As Kevinj said, my outboard auger bearing collars were also loose. When I had the blower apart this spring, I replaced all the bearings (cheap to do and good peace of mind.) I'm not much of a mechanic, but I found the 2750 pretty easy to work on. Can you send pictures when you get the grease fitting installed? Dyer, retired

 

[NY_Yankees_Fan]

Thanks for posting the photos and info, I will add that to my list of things to do before I put the blower away in the spring.

 

[Dusty]

The fan in now straightened, and the grease fitting has been installed. I will pick up a can of Chevrolet Engine Orange, and put the finishing touches on it tomorrow. Then reassemble and test. If all goes well after testing, I will fill the shaft with grease so there will be no more rusting of the shaft, and the bushings will be well lubricated.
To install the grease fitting, you need to drill into the center shaft between the two bushings. Then disassemble a right angle grease fitting, and install the bottom part first. Then install the angle fitting, and tighten. All that is left to do now, is to adjust the lower half in a direction that is easy to get your grease gun onto the fitting. I will be using a extreme pressure (EP) molybdenum disulfide grease for this application. Once a season greasing should be enough and with this high quality grease, if you forget, there is plenty of residual supply in the shaft.

 

[Dusty]

Finished painting it tonight, and will reinstall it tomorrow.

 

[Dyer retired]

Finished painting it tonight, and will reinstall it tomorrow.

Dusty,

You did a good job of painting the fan without getting any on the chair! I like the grease fitting and will do that to mine in the Spring. Thanks for posting the pictures. I'd say the Chevy Engine Orange is a close match! Let us know how the test run goes. Dyer, retired

 

[Dusty]

Finished putting it together today, and it works just like new........... almost. It has been so long ago that it was new, that I don't really remember what it was like when new. Hopefully, this will be the last repair that it will need this winter. Have some other projects that I want to spend some time with..

 

[LotharKrepke]

Howdy,

The problems described in this thread are similar to hassles I am having with my B2772 Snowthrower...

Starting a few days ago, the impeller is just "zinging" the bottom of its enclosure. It touches, but does not bind. I can easily push it past the contact point by hand.

The blade in the top position clears the enclosure by about 3/8".

Is there an adjustment to allow me to center the impellor properly, or is this more likely a call for a bearing job?

Many thanks for any tips,

Lothar

 

[16valex]

Where is a good place to buy some Chevrolet engine orange paint?

 

[number two]

Auto parts store

 

[Dusty]

I buy the Chevrolet engine paint from Bill Hirsch Auto Parts 396 Littleton Ave, Newark, NJ 07103. (973) 642-2404 Bill Hirsch Engine Enamel $42 per quart plus shipping. however, it is a lifetime supply. When storing paint, turn the can over every few months to keep the solids from gathering at the bottom of the can.
I purchased the 1 quart can thinned it with xylene and applied it with a brush. In warm weather, it flows out without brush marks. Extremely durable and it sticks like glue. It isn't the least expensive product, but it is the best product that you will ever find. Auto Restoration Supplies for Classic Cars, Antique Cars, Exotic Cars - HirschAuto.com