This site uses cookies to maintain login information on FarmallCub.Com. Click the X in the banner upper right corner to close this notice. For more information on our privacy policy, visit this link:
Privacy Policy

NEW REGISTERED MEMBERS: Be sure to check your SPAM/JUNK folders for the activation email.

Model 50 snowthrower breaking shearpins

IH CUB Lo-Boy Series - 154, 184, 185 Forum -- Questions and answers to all of your Lo-Boy related issues.
Forum rules
Notice: For sale and wanted posts are not allowed in this forum. Please use our free classifieds or one of our site sponsors for your tractor and parts needs.
outdoors4evr
10+ Years
10+ Years
Posts: 2784
Joined: Tue Jul 22, 2008 12:44 pm
Zip Code: 48370
Tractors Owned: 184
Location: Oxford, MI

Model 50 snowthrower breaking shearpins

Postby outdoors4evr » Sat Dec 17, 2011 7:29 am

I have broken a pin twice in the rotor drive assembly and don't know why. Everything turns very easily and is loose.
Yesterday I had the tractor running about 1/2 throttle, turned on the PTO and it broke the pin through the small chain sprocket.
The pin is the 1/4" x 2" coiled spring (from the dealer) and this pin is taking the full torque of the PTO and transferring the force from the driveshaft to the sprocket. There isn't enough room to use a hardened steel bolt and nut. I took it all apart and there isn't a keyway or anything else engineered. I also noticed that the sprocket slides easily onto the shaft. Should this be a tight fit?

Has anyone else had difficulty with this?
184 w/ Creeper & 3-Point
IH 3160a Mower
IH Model 15 Tiller
IH-54 Blade

SPONSOR AD

Sponsor



Sponsor
 

User avatar
b52c130
10+ Years
10+ Years
Posts: 188
Joined: Wed Sep 03, 2008 4:35 pm
Zip Code: 07869
Location: Randolph, NJ

Re: Model 50 snowthrower breaking shearpins

Postby b52c130 » Sat Dec 17, 2011 8:46 am

Outdoors,
Because you have a 184, with an 'electric PTO Clutch', having that pin break while engaging that 18" to 24" x 56" long drum at 1/2 throttle would be considered 'normal'. Because of the instant 'wham' engagement of an electric clutch, you must throttle back to idle before trying to engage that type of 'rotating mass'. If you had a 'manual' PTO clutch, like the 154 or 185, you could 'feather in' the engagement - but not so with an electric clutch. As a point of 'good operator manners', no matter what type of clutch you have, you should always throttle back to the lowest throttle position available (that won't stall the engine) before engaging any clutch driven accessory. You wouldn't wind the engine on your truck up to half throttle and 'pop the clutch' to engage the transmission (unless you are 16 and don't have to pay for the new tires). - NJDale

Phazer
10+ Years
10+ Years
Posts: 134
Joined: Tue Aug 03, 2010 11:34 am
Zip Code: 46975

Re: Model 50 snowthrower breaking shearpins

Postby Phazer » Sat Dec 17, 2011 6:19 pm

Are you 100% sure the dealer sold you an OEM pin? Maybe they picked them up from an independent supplier to save a few bucks.

I know the driveshaft pins on a Cub Cadet can't be the standard hardware store brand.

Just sayin . .

outdoors4evr
10+ Years
10+ Years
Posts: 2784
Joined: Tue Jul 22, 2008 12:44 pm
Zip Code: 48370
Tractors Owned: 184
Location: Oxford, MI

Re: Model 50 snowthrower breaking shearpins

Postby outdoors4evr » Mon Dec 19, 2011 12:46 pm

Already learned the OEM vs. Aftermarket lesson. This is definitely the OEM (wound springsteel) not a cheap roll pin.
Wish I had a little more space. 1/16" more would allow for a hardened steel bolt and nut.

I am thinking about putting a bolt through it then welding a knob onto the other side of the bolt as a keeper. It would have to be cut off to replace, but it would probably withstand the heavy snowblowing better than the pin.
184 w/ Creeper & 3-Point
IH 3160a Mower
IH Model 15 Tiller
IH-54 Blade

User avatar
twotone
10+ Years
10+ Years
Posts: 1189
Joined: Sat May 14, 2011 6:09 pm
Zip Code: 15132
Tractors Owned: 53 F Cub
73 F Cub
53 Super A With Snow/Grader Blade
193 Plow With Colter And Jointer
144 Cultivators
22 Mower
Circle of Safety: Y
Location: Versailles,Pa.

Re: Model 50 snowthrower breaking shearpins

Postby twotone » Mon Dec 19, 2011 1:44 pm

I have a big bag of stainless steel roll pins that are very strong. I wouldn't use one if it is supposed shear when running through something bad in the snow.

Tom
Know Your Cub, And Your Cub Will Know You.

Tom

Phazer
10+ Years
10+ Years
Posts: 134
Joined: Tue Aug 03, 2010 11:34 am
Zip Code: 46975

Re: Model 50 snowthrower breaking shearpins

Postby Phazer » Mon Dec 19, 2011 6:58 pm

Bolts usually wear in two from the constant loading/unloading. I also found out the hard way that you can get too hard of a pin, (very brittle).

Hope you get it figured out.


Return to “Lo-Boy Series - 154, 184, 185”

Who is online

Users browsing this forum: No registered users and 3 guests