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View Full Version : cub cadet Z force 44 noise under the deck


crush
07-20-2007, 05:01 PM
The idler-pully spring broke on the mower deck. The local dealer replaced the spring and belt. Ever since, there has been a huming noise coming from the deck after the first 15 minutes of cutting; when the PTO is first engaged, the mower deck sounds fine, and cuts well. However, the humming noise starts after the first five or so minutes of cutting, and gradually builds to a distinctive consitant hum after 15 minutes. The local dealer thinks this is normal. In fact, they lowered the rpms of the mower so the hum was less noticable, but it's still there. Ive cut with this mower for over a year without this noise. I've also cut with other brands and have never experienced this. There is still one year left on the warranty, and it doesn't sound right to me, and Cub cadet has terrible customer service. They treat you like cancer when you call for help directly. You get the impression their service reps are trained on how to ovoid confronting customer's with warranty work. The local rep is stumped. What could this be?

Neal0301
07-20-2007, 11:37 PM
I have a cubcadet z force 44 but i only use it for my yard and a few residentals i have in my neighborhood. they only problem i have is that my dad will never get the blades sharpened...:nono: :cry: so i have to double cut everytime i use it. :angry: ....as for the noise, i never notice "humming". i always hear a buzzing noise but not a humming, is it an anoying loud humming like a bee by your ear?

newz7151
07-21-2007, 12:36 AM
How many lawns do you do a week with it?

Neal0301
07-21-2007, 12:58 AM
sparatic...i mostly professionalize at trimming. Right now im currently maintaining brush at an old farm lot pending the development of a home on it. I mow part time and work another job. Once i get a trailer i will use the Cubcadet more frequently, sorry i cant be much help to your problem, i would try another place to get a second or even third opinion. the place i bought mine from i dont let service, i go somewhere else. i dont know why, i jus do haha

crush
07-21-2007, 02:59 PM
The humming noise under the deck is a distinctive sound that starts as a normal sound like helicopter blades. Whoooooooooooom... and is consitant. Which in my experience is a normal sound. Then the humming sound, and maybe that's not the best way to descibe it, is more like a Whoooom--Whoooom/Whooom--whooom/Whoooom--Whoooom/. So it goes from a consistant sound to an oscillating sound; hard to describle using text. I even thought there may have been some build up under the deck, the dealer did as well. However, I've made sure that the deck has been cleaned after each use. Very frustrting. I'm thinking something is wrong with the spindles. I also was thinking of taking it to another dealer. Just wasn't sure if I would get the same run around. The mower has spent a lot of time in the shop; It's been in 6 times for the same situation.

Big Bad Bob
07-28-2007, 02:24 AM
The idler-pully spring broke on the mower deck. The local dealer replaced the spring and belt. Ever since, there has been a huming noise coming from the deck after the first 15 minutes of cutting; when the PTO is first engaged, the mower deck sounds fine, and cuts well. However, the humming noise starts after the first five or so minutes of cutting, and gradually builds to a distinctive consitant hum after 15 minutes. The local dealer thinks this is normal. In fact, they lowered the rpms of the mower so the hum was less noticable, but it's still there. Ive cut with this mower for over a year without this noise. I've also cut with other brands and have never experienced this. There is still one year left on the warranty, and it doesn't sound right to me, and Cub cadet has terrible customer service. They treat you like cancer when you call for help directly. You get the impression their service reps are trained on how to ovoid confronting customer's with warranty work. The local rep is stumped. What could this be?


check the drive pulley that uses the belt from the motor. the center seems to wear out and the pulley gets a bit cocked on the mounting bolt. try putting a little oil (no zert on this pulley, ??) on the center bolt of the pulley and see if that helps.

eaglejrl
07-28-2007, 11:21 PM
I had a cub cadet z-force 44. The spindles are prone to going out prematurely. I had less than 200 hours on mine and replaced all three spindles about 4 times. When they start to go out, it could be described as a hum - but eventually turns into a squeal. It could be the idler itself - I had to replace one of those also.
I had problem after problem with mine - I had to sell it and buy a commercial grade mower. You might want to pay close attention while it is still under waranty.

newz7151
07-28-2007, 11:54 PM
I had a cub cadet z-force 44. The spindles are prone to going out prematurely. I had less than 200 hours on mine and replaced all three spindles about 4 times. When they start to go out, it could be described as a hum - but eventually turns into a squeal. It could be the idler itself - I had to replace one of those also.
I had problem after problem with mine - I had to sell it and buy a commercial grade mower. You might want to pay close attention while it is still under waranty.

It should also be noted (again) that the Z-force line is only covered for one year/150 hours for commercial use and 3 years/150 hours for residential use.

Big Bad Bob
07-29-2007, 12:54 AM
I had a cub cadet z-force 44. The spindles are prone to going out prematurely. I had less than 200 hours on mine and replaced all three spindles about 4 times. When they start to go out, it could be described as a hum - but eventually turns into a squeal. It could be the idler itself - I had to replace one of those also.
I had problem after problem with mine - I had to sell it and buy a commercial grade mower. You might want to pay close attention while it is still under waranty.

a lot of that is caused by simply not tightening the blade nuts to the proper torque.
500 hours, commercially and the only problem i've had is the main drive pulley. 50.00 and that was solved.
for me it is a great machine to use when the ground is wet because it is so light. i wouldn't use it as a front line machine but it does have it's niche. maybe i've just been lucky but i've taken great pains to maintain it properly.
do not confuse it with the rzt though. my opinion is the rzt looks like it is built too cheaply to even be a reliable homeowners machine. my opinion only as i've never used an rzt.

newz7151
07-29-2007, 10:59 AM
my opinion is the rzt looks like it is built too cheaply to even be a reliable homeowners machine. my opinion only as i've never used an rzt.

Which is obviously shared by MTD as they only provide a 3 year/120 hour warranty on this, their "premium brand" mower. I mean, what's that say to the consumer.. "well, if you get 120 hours of use out of it, you've gotten what we've expected it to stand up for". Really that's what, maybe a year and a half of cutting on a 2 acre residential lot?

Mowingman
07-29-2007, 12:04 PM
I am a Cub dealer. I would bet, from your description of the sound, that you have a spindle bearing going out. These mowers eat deck pulleys, spindles and belts on a regular basis. If used only for very light duty mowing, they seem to work ok. Any heavy mowing at all, and these various deck components go to pieces.

crush
08-05-2007, 12:58 PM
Thanks guys for all the positive feedback. This is a great forum for multiple experiences on a specific topic. To update everyone, I did have another dealer look at the mower; they felt that this noise was normal as well. Answer was it's the blades chopping air under the deck. My gut is still telling me that it's not the answer, especiaaly since the noise didn't start until the idle pully and sping broke. I would feel different if the noise was there from the beginning, but then again maybe it's a brake-in issue? No one could confirm that either.

I think I'm going to take newz7151's advice, however, and monitor closely for the next year, and move on to a commercial grade mower after that. I do like the fact that it's about 50% lighter than a full commercial grade. However, I will try my best to avoid cutting in wet situations.