3160A deck noise and vibration

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fletchfletch
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3160A deck noise and vibration

Postby fletchfletch » Sun Oct 04, 2015 4:46 pm

My 184 has a 3160A deck which has developed a loud noise and slight vibration. One spindle was loose and sloppy so I rebuilt it with new bearings and seals. I installed the spindle but the noise and vibration remain. The deck belt bounces quite a bit and is hitting the deck itself. Is this the cause of the noise and vibration and if so, what is the problem ?

outdoors4evr
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Re: 3160A deck noise and vibration

Postby outdoors4evr » Mon Oct 05, 2015 12:53 pm

You probably want to start by balancing (or replacing) your mower blades.
184 w/ Creeper & 3-Point
IH 3160a Mower
IH Model 15 Tiller

fletchfletch
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Re: 3160A deck noise and vibration

Postby fletchfletch » Mon Oct 05, 2015 7:22 pm

Thank you for your reply. Upon inspection I noticed that there is a slight bend in the blade that I could see from the discharge side of the deck. The bend occurs in the flat area where the blade bolts to the spindle. Since I don't have a new blade to compare to, should that bend be there ?

outdoors4evr
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Re: 3160A deck noise and vibration

Postby outdoors4evr » Tue Oct 06, 2015 7:20 am

Look for a replacement blade. The original OEM blades have these dimensions.
20-5/8" long 2-1/2" wide 1/4" thick with a 3/4" hole (circular)

Oregon used to offer a very good similar size.
184 w/ Creeper & 3-Point
IH 3160a Mower
IH Model 15 Tiller

outdoors4evr
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Posts: 1449
Joined: Tue Jul 22, 2008 12:44 pm
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Re: 3160A deck noise and vibration

Postby outdoors4evr » Tue Oct 06, 2015 7:35 am

HamiltonBob has a tips and tricks page you might want to visit. One of his tips are about vibration in the mower deck.
http://www.hamiltonbobscubs.com/previoustips.txt
184 w/ Creeper & 3-Point
IH 3160a Mower
IH Model 15 Tiller

Eugene
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Re: 3160A deck noise and vibration

Postby Eugene » Tue Oct 06, 2015 7:47 am

outdoors4evr wrote:Oregon used to offer a very good similar size.
Visit your auto parts store. Their outdoor catalog has a listing of mower blades by dimensions.

From an old Prime Line parts catalog. Part number 7-04463, Cub Cadet 117453-C1. Length 20 21/32". Center hole 3/4". Flat blade. 2 1/2" wide. .250 thick.

I needed new blades for my 3260 mower deck. The two outer blades were no longer available. I cut down and balanced two new center blades and used as the two outer blades.

On the Cub Cadet blade, it wouldn't take much to remove the additional 1/64th inch from each end of the blade. Or the additional 1/64th on each end may not make any difference in clearing the mower deck sides.
I have an excuse. CRS.

Larry B
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Re: 3160A deck noise and vibration

Postby Larry B » Tue Oct 06, 2015 8:46 am

A slight bend in a blade should not cause that kind of vibration. First i would remove the PTO and deck belts and check them for ruptures then check the fixed and spring loaded idlers at the bottom back of the tractor. They are a common noise maker. then turn the deck spindles by hand to check bearings and watch blades for wobble or being unlevel with deck. Look for pulleys on top for wobble. Check idlers for bad bearings. If everything looks fine then remove blades and put belts back on and turn on deck and check for noise and vibration. If deck is really rusty you could have a spindle wobbling from deck flex from severe rust. NOT GOOD. If you have a bent blade I would change it. They are availabe for reasonable money. With the deck belt off you can also grab the ends of the blades and twist up and down to check for bad spindle bearings. Any play is too much. You say the belt is hitting the deck. The belts on a 3160A move around a lot but if it moves enough to have the belt slapping the deck then something is moving as it turns.
Larry

fletchfletch
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Re: 3160A deck noise and vibration

Postby fletchfletch » Tue Oct 06, 2015 11:28 am

Thank you everyone for your help. I rebuilt the one spindle which had some play side to side ( grabbing the ends of the blade and trying to move it side to side). All three spindles are now tight although if you grab a pulley and pull upward, you get about 3/16" worth of play. Based on the design of the spindle and housing, the only way I can see to eliminate that play would be to add shims. That play occurs in both the rebuilt and not rebuilt spindles so my guess is that its supposed to be that way.
If the spindles are good, yet the belt slaps the deck, the only moving part left is the idler pulley of which I will inspect.
Hopefully this is a simple fix. I just replaced the clutch plate, friction disc, pilot bearing, throw out bearing fork, drive shaft, radiator hose and gasket. Not to mention, I had to have a spindle housing brazed because it had broke along the end where it bolts to the deck. $80.00 later, its fixed.

Hamilton Bob loves me !

outdoors4evr
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Re: 3160A deck noise and vibration

Postby outdoors4evr » Thu Oct 15, 2015 7:43 am

Glad you are able to get to the root cause! The 3160a mower is a wonderful deck. Hopefully your work will result in many years of service!
184 w/ Creeper & 3-Point
IH 3160a Mower
IH Model 15 Tiller

outdoors4evr
10+ Years
10+ Years
Posts: 1449
Joined: Tue Jul 22, 2008 12:44 pm
Zip Code: 48423
Tractors Owned: 184
Location: Davison, MI

Re: 3160A deck noise and vibration

Postby outdoors4evr » Fri Oct 30, 2015 8:59 am

@fletchfletch
I did my winter prep on my 3160a deck and planned to replace my belts and blades this year.
Out of curiousity, I did some jiggling and prodding on my spindles and could not get them to move side to side or up and down at all. These are very solid, yet easy to turn (with or without blades)

I have some slop in my idler/tensioner pulley and this is getting noticeably worn. This allows some belt movement up and down while running and I probably need to replace this pulley.

I ended up purchasing blades from HamiltonBobsCubs and found these to be a little different than the no longer available Oregon blades. They have a little less lift on the back side of the blades and are a little longer (1/8" on each end) than the Oregons. The length should help a bit with the grass slipping through in the corners. Not sure how the difference in lift will perform. Overall, these blades from HamiltonBobsCubs match up exactly with the specifications from the manual.
184 w/ Creeper & 3-Point
IH 3160a Mower
IH Model 15 Tiller


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