Bolt failure on Alternator mounting bracket - Polaris Brutus Forum
 
LinkBack Thread Tools
post #1 of 2 (permalink) Old 05-26-2017, 01:25 PM Thread Starter
Member
 
GhostRider's Avatar
 
Join Date: Oct 2016
Location: Tellico Plains, TN
Posts: 46
Bolt failure on Alternator mounting bracket

Yes we had a hardened bolt failure. A microstructure fracturing propagated by a natural thread root stress riser is the culprit. The shoulder length of the bolt failed to extend into the engine block counter bore which would have greatly reduced mounting face movement frequency. A cardinal design sin... Yes the bolt is what Polaris calls for and it was installed by the Dealer.

Having some left-handed carbide drill bits, I attempted to remove the broken bolt end. As you can see even stepping up the size of the bits would not disengage the broken end threads.

The dealer had to pull the engine in order to get the engine block on a machining center to perform a salvage proceedure?.

Might want to have a look at yours..
.
Attached Images
File Type: jpg IMG_20170514_092807_1495818041817.jpg (124.8 KB, 7 views)
File Type: jpg IMG_20170514_094252_1495818094452.jpg (75.1 KB, 7 views)
GhostRider is offline  
Sponsored Links
Advertisement
 
post #2 of 2 (permalink) Old 06-09-2017, 12:14 PM Thread Starter
Member
 
GhostRider's Avatar
 
Join Date: Oct 2016
Location: Tellico Plains, TN
Posts: 46
Update:
Polaris admits error, only after my Dealer fought them for two weeks. Service Manager Madison would not accept anything else. With all the bad stories about Dealers on here, looks like I am lucky to have Ritchie Brothers Polaris in Maryville, TN. All parts and labor covered, a longer shoulder bolt has been specified by Polaris.

If you have not checked to make sure that your Brutus has bolt shoulder contact in the counter bore, expect a failure there. It's easy to check, remove the bolt, verify that the bolt shoulder is longer than the through hole in the mounting bracket.

I will post the new bolt part number when I get it. I hope this post saves some of the members the headache I have been thru...
GhostRider is offline  
Reply

Quick Reply
Message:
Options

Register Now



In order to be able to post messages on the Polaris Brutus Forum forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.

Password:


Confirm Password:
Email Address
Please enter a valid email address for yourself.

Email Address:
OR

Log-in









Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.



Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page



Posting Rules  
You may post new threads
You may post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On

 
For the best viewing experience please update your browser to Google Chrome